./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.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 ac0640f0fcc4a5f0ffb56b20f1dcc3bfae303b44 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 16:59:18,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 16:59:18,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 16:59:18,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 16:59:18,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 16:59:18,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 16:59:18,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 16:59:18,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 16:59:18,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 16:59:18,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 16:59:18,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 16:59:18,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 16:59:18,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 16:59:18,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 16:59:18,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 16:59:18,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 16:59:18,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 16:59:18,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 16:59:18,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 16:59:18,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 16:59:18,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 16:59:18,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 16:59:18,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 16:59:18,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 16:59:18,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 16:59:18,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 16:59:18,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 16:59:18,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 16:59:18,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 16:59:18,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 16:59:18,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 16:59:18,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 16:59:18,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 16:59:18,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 16:59:18,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 16:59:18,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 16:59:18,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 16:59:18,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 16:59:18,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 16:59:18,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 16:59:18,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 16:59:18,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-08-27 16:59:19,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 16:59:19,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 16:59:19,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 16:59:19,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 16:59:19,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 16:59:19,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 16:59:19,007 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 16:59:19,007 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 16:59:19,007 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 16:59:19,008 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 16:59:19,008 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 16:59:19,008 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 16:59:19,008 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 16:59:19,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 16:59:19,008 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 16:59:19,009 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 16:59:19,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 16:59:19,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 16:59:19,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 16:59:19,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 16:59:19,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 16:59:19,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 16:59:19,010 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 16:59:19,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 16:59:19,010 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 16:59:19,010 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 16:59:19,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 16:59:19,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 16:59:19,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 16:59:19,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 16:59:19,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 16:59:19,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 16:59:19,012 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 16:59:19,012 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac0640f0fcc4a5f0ffb56b20f1dcc3bfae303b44 [2021-08-27 16:59:19,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 16:59:19,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 16:59:19,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 16:59:19,317 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 16:59:19,318 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 16:59:19,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c [2021-08-27 16:59:19,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aefcb71f/c579013007514a168af5242be54b64bc/FLAG4307b3cc3 [2021-08-27 16:59:19,813 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 16:59:19,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c [2021-08-27 16:59:19,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aefcb71f/c579013007514a168af5242be54b64bc/FLAG4307b3cc3 [2021-08-27 16:59:19,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aefcb71f/c579013007514a168af5242be54b64bc [2021-08-27 16:59:19,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 16:59:19,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 16:59:19,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 16:59:19,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 16:59:19,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 16:59:19,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:59:19" (1/1) ... [2021-08-27 16:59:19,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d01b43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:19, skipping insertion in model container [2021-08-27 16:59:19,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:59:19" (1/1) ... [2021-08-27 16:59:19,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 16:59:19,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 16:59:19,963 WARN L228 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.4.ufo.BOUNDED-8.pals.c[8294,8307] [2021-08-27 16:59:19,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 16:59:19,970 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 16:59:20,040 WARN L228 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.4.ufo.BOUNDED-8.pals.c[8294,8307] [2021-08-27 16:59:20,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 16:59:20,068 INFO L208 MainTranslator]: Completed translation [2021-08-27 16:59:20,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:20 WrapperNode [2021-08-27 16:59:20,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 16:59:20,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 16:59:20,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 16:59:20,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 16:59:20,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:20" (1/1) ... [2021-08-27 16:59:20,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:20" (1/1) ... [2021-08-27 16:59:20,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 16:59:20,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 16:59:20,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 16:59:20,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 16:59:20,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:20" (1/1) ... [2021-08-27 16:59:20,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:20" (1/1) ... [2021-08-27 16:59:20,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:20" (1/1) ... [2021-08-27 16:59:20,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:20" (1/1) ... [2021-08-27 16:59:20,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:20" (1/1) ... [2021-08-27 16:59:20,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:20" (1/1) ... [2021-08-27 16:59:20,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:20" (1/1) ... [2021-08-27 16:59:20,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 16:59:20,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 16:59:20,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 16:59:20,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 16:59:20,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:20" (1/1) ... [2021-08-27 16:59:20,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:59:20,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:59:20,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:59:20,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-08-27 16:59:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 16:59:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 16:59:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 16:59:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 16:59:20,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 16:59:20,599 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-08-27 16:59:20,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:59:20 BoogieIcfgContainer [2021-08-27 16:59:20,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 16:59:20,601 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 16:59:20,601 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 16:59:20,610 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 16:59:20,610 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 16:59:20,610 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 04:59:19" (1/3) ... [2021-08-27 16:59:20,611 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5f9605e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 04:59:20, skipping insertion in model container [2021-08-27 16:59:20,611 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 16:59:20,611 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:59:20" (2/3) ... [2021-08-27 16:59:20,611 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5f9605e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 04:59:20, skipping insertion in model container [2021-08-27 16:59:20,611 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 16:59:20,611 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:59:20" (3/3) ... [2021-08-27 16:59:20,612 INFO L389 chiAutomizerObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c [2021-08-27 16:59:20,671 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 16:59:20,671 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 16:59:20,671 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 16:59:20,672 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 16:59:20,672 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 16:59:20,672 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 16:59:20,672 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 16:59:20,672 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 16:59:20,695 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 76 states, 75 states have (on average 1.6933333333333334) internal successors, (127), 75 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:59:20,716 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 43 [2021-08-27 16:59:20,716 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:59:20,717 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:59:20,726 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 16:59:20,726 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] [2021-08-27 16:59:20,726 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 16:59:20,728 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 76 states, 75 states have (on average 1.6933333333333334) internal successors, (127), 75 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:59:20,737 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 43 [2021-08-27 16:59:20,737 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:59:20,737 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:59:20,739 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 16:59:20,739 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] [2021-08-27 16:59:20,744 INFO L791 eck$LassoCheckResult]: Stem: 54#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(32);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12);~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;~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]; 40#L-1true havoc main_#res;havoc main_#t~nondet11, main_#t~nondet12, main_#t~nondet13, main_#t~nondet14, main_#t~nondet15, main_#t~nondet16, main_#t~nondet17, main_#t~nondet18, main_#t~nondet19, main_#t~nondet20, main_#t~nondet21, main_#t~nondet22, main_#t~nondet23, main_#t~nondet24, main_#t~nondet25, main_#t~nondet26, main_#t~nondet27, main_#t~ret28, main_#t~ret29, main_#t~post30, main_~c1~0, main_~i2~0;havoc main_~c1~0;havoc main_~i2~0;main_~c1~0 := 0;~r1~0 := main_#t~nondet11;havoc main_#t~nondet11;~id1~0 := main_#t~nondet12;havoc main_#t~nondet12;~st1~0 := main_#t~nondet13;havoc main_#t~nondet13;~send1~0 := main_#t~nondet14;havoc main_#t~nondet14;~mode1~0 := main_#t~nondet15;havoc main_#t~nondet15;~id2~0 := main_#t~nondet16;havoc main_#t~nondet16;~st2~0 := main_#t~nondet17;havoc main_#t~nondet17;~send2~0 := main_#t~nondet18;havoc main_#t~nondet18;~mode2~0 := main_#t~nondet19;havoc main_#t~nondet19;~id3~0 := main_#t~nondet20;havoc main_#t~nondet20;~st3~0 := main_#t~nondet21;havoc main_#t~nondet21;~send3~0 := main_#t~nondet22;havoc main_#t~nondet22;~mode3~0 := main_#t~nondet23;havoc main_#t~nondet23;~id4~0 := main_#t~nondet24;havoc main_#t~nondet24;~st4~0 := main_#t~nondet25;havoc main_#t~nondet25;~send4~0 := main_#t~nondet26;havoc main_#t~nondet26;~mode4~0 := main_#t~nondet27;havoc main_#t~nondet27;havoc init_#res;havoc init_~tmp~0;havoc init_~tmp~0; 35#L162true assume !(0 == ~r1~0);init_~tmp~0 := 0; 48#L162-1true init_#res := init_~tmp~0; 16#L255true main_#t~ret28 := init_#res;main_~i2~0 := main_#t~ret28;havoc main_#t~ret28; 51#L311true assume !(0 == main_~i2~0); 33#L311-2true ~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 := 0; 13#L321-2true [2021-08-27 16:59:20,749 INFO L793 eck$LassoCheckResult]: Loop: 13#L321-2true assume !!(main_~i2~0 < 8);havoc node1_#t~ite7, node1_~m1~0;havoc node1_~m1~0;node1_~m1~0 := ~nomsg~0; 5#L61true assume !(0 != ~mode1~0 % 256); 72#L75true assume ~send1~0 != ~nomsg~0 && ~p1_new~0 == ~nomsg~0;node1_#t~ite7 := ~send1~0; 52#L75-2true ~p1_new~0 := (if node1_#t~ite7 % 256 <= 127 then node1_#t~ite7 % 256 else node1_#t~ite7 % 256 - 256);havoc node1_#t~ite7;~mode1~0 := 1; 49#L61-2true havoc node2_#t~ite8, node2_~m2~0;havoc node2_~m2~0;node2_~m2~0 := ~nomsg~0; 61#L87true assume 0 != ~mode2~0 % 256;node2_~m2~0 := ~p1_old~0;~p1_old~0 := ~nomsg~0; 60#L90true assume !(node2_~m2~0 != ~nomsg~0); 24#L90-1true ~mode2~0 := 0; 7#L87-2true havoc node3_#t~ite9, node3_~m3~0;havoc node3_~m3~0;node3_~m3~0 := ~nomsg~0; 57#L112true assume !(0 != ~mode3~0 % 256); 18#L125true assume ~send3~0 != ~nomsg~0 && ~p3_new~0 == ~nomsg~0;node3_#t~ite9 := ~send3~0; 10#L125-2true ~p3_new~0 := (if node3_#t~ite9 % 256 <= 127 then node3_#t~ite9 % 256 else node3_#t~ite9 % 256 - 256);havoc node3_#t~ite9;~mode3~0 := 1; 67#L112-2true havoc node4_#t~ite10, node4_~m4~0;havoc node4_~m4~0;node4_~m4~0 := ~nomsg~0; 73#L137true assume !(0 != ~mode4~0 % 256); 34#L150true assume ~send4~0 != ~nomsg~0 && ~p4_new~0 == ~nomsg~0;node4_#t~ite10 := ~send4~0; 19#L150-2true ~p4_new~0 := (if node4_#t~ite10 % 256 <= 127 then node4_#t~ite10 % 256 else node4_#t~ite10 % 256 - 256);havoc node4_#t~ite10;~mode4~0 := 1; 50#L137-2true ~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;havoc check_#res;havoc check_~tmp~1;havoc check_~tmp~1; 69#L263true assume !(~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 <= 1);check_~tmp~1 := 0; 75#L263-1true check_#res := check_~tmp~1; 31#L283true main_#t~ret29 := check_#res;main_~c1~0 := main_#t~ret29;havoc main_#t~ret29;assert_#in~arg := (if 0 == main_~c1~0 then 0 else 1);havoc assert_~arg;assert_~arg := assert_#in~arg; 46#L348true assume !(0 == assert_~arg % 256); 26#L343true main_#t~post30 := main_~i2~0;main_~i2~0 := 1 + main_#t~post30;havoc main_#t~post30; 13#L321-2true [2021-08-27 16:59:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:59:20,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1932780748, now seen corresponding path program 1 times [2021-08-27 16:59:20,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:59:20,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97262415] [2021-08-27 16:59:20,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:59:20,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:59:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:59:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:59:20,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:59:20,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97262415] [2021-08-27 16:59:20,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97262415] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 16:59:20,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 16:59:20,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 16:59:20,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543383348] [2021-08-27 16:59:20,997 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 16:59:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:59:21,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1227460585, now seen corresponding path program 1 times [2021-08-27 16:59:21,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:59:21,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411249465] [2021-08-27 16:59:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:59:21,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:59:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:59:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:59:21,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:59:21,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411249465] [2021-08-27 16:59:21,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411249465] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 16:59:21,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 16:59:21,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 16:59:21,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600323966] [2021-08-27 16:59:21,167 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 16:59:21,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:59:21,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 16:59:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 16:59:21,183 INFO L87 Difference]: Start difference. First operand has 76 states, 75 states have (on average 1.6933333333333334) internal successors, (127), 75 states have internal predecessors, (127), 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) [2021-08-27 16:59:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:59:21,264 INFO L93 Difference]: Finished difference Result 122 states and 194 transitions. [2021-08-27 16:59:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 16:59:21,265 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 122 states and 194 transitions. [2021-08-27 16:59:21,268 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 42 [2021-08-27 16:59:21,270 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 122 states to 113 states and 163 transitions. [2021-08-27 16:59:21,271 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 113 [2021-08-27 16:59:21,271 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 113 [2021-08-27 16:59:21,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 163 transitions. [2021-08-27 16:59:21,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 16:59:21,273 INFO L681 BuchiCegarLoop]: Abstraction has 113 states and 163 transitions. [2021-08-27 16:59:21,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 163 transitions. [2021-08-27 16:59:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 71. [2021-08-27 16:59:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 71 states have (on average 1.352112676056338) internal successors, (96), 70 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:59:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-08-27 16:59:21,291 INFO L704 BuchiCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-08-27 16:59:21,291 INFO L587 BuchiCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-08-27 16:59:21,291 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 16:59:21,291 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 71 states and 96 transitions. [2021-08-27 16:59:21,292 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 42 [2021-08-27 16:59:21,292 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:59:21,292 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:59:21,293 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] [2021-08-27 16:59:21,293 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] [2021-08-27 16:59:21,293 INFO L791 eck$LassoCheckResult]: Stem: 278#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(32);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12);~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;~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]; 268#L-1 havoc main_#res;havoc main_#t~nondet11, main_#t~nondet12, main_#t~nondet13, main_#t~nondet14, main_#t~nondet15, main_#t~nondet16, main_#t~nondet17, main_#t~nondet18, main_#t~nondet19, main_#t~nondet20, main_#t~nondet21, main_#t~nondet22, main_#t~nondet23, main_#t~nondet24, main_#t~nondet25, main_#t~nondet26, main_#t~nondet27, main_#t~ret28, main_#t~ret29, main_#t~post30, main_~c1~0, main_~i2~0;havoc main_~c1~0;havoc main_~i2~0;main_~c1~0 := 0;~r1~0 := main_#t~nondet11;havoc main_#t~nondet11;~id1~0 := main_#t~nondet12;havoc main_#t~nondet12;~st1~0 := main_#t~nondet13;havoc main_#t~nondet13;~send1~0 := main_#t~nondet14;havoc main_#t~nondet14;~mode1~0 := main_#t~nondet15;havoc main_#t~nondet15;~id2~0 := main_#t~nondet16;havoc main_#t~nondet16;~st2~0 := main_#t~nondet17;havoc main_#t~nondet17;~send2~0 := main_#t~nondet18;havoc main_#t~nondet18;~mode2~0 := main_#t~nondet19;havoc main_#t~nondet19;~id3~0 := main_#t~nondet20;havoc main_#t~nondet20;~st3~0 := main_#t~nondet21;havoc main_#t~nondet21;~send3~0 := main_#t~nondet22;havoc main_#t~nondet22;~mode3~0 := main_#t~nondet23;havoc main_#t~nondet23;~id4~0 := main_#t~nondet24;havoc main_#t~nondet24;~st4~0 := main_#t~nondet25;havoc main_#t~nondet25;~send4~0 := main_#t~nondet26;havoc main_#t~nondet26;~mode4~0 := main_#t~nondet27;havoc main_#t~nondet27;havoc init_#res;havoc init_~tmp~0;havoc init_~tmp~0; 264#L162 assume 0 == ~r1~0; 265#L163 assume ~id1~0 >= 0; 240#L164 assume 0 == ~st1~0; 231#L165 assume ~send1~0 == ~id1~0; 232#L166 assume 0 == ~mode1~0 % 256; 244#L167 assume ~id2~0 >= 0; 225#L168 assume 0 == ~st2~0; 226#L169 assume ~send2~0 == ~id2~0; 285#L170 assume 0 == ~mode2~0 % 256; 271#L171 assume ~id3~0 >= 0; 269#L172 assume 0 == ~st3~0; 270#L173 assume ~send3~0 == ~id3~0; 282#L174 assume 0 == ~mode3~0 % 256; 218#L175 assume ~id4~0 >= 0; 219#L176 assume 0 == ~st4~0; 272#L177 assume ~send4~0 == ~id4~0; 260#L178 assume 0 == ~mode4~0 % 256; 261#L179 assume ~id1~0 != ~id2~0; 216#L180 assume ~id1~0 != ~id3~0; 217#L181 assume ~id1~0 != ~id4~0; 253#L182 assume ~id2~0 != ~id3~0; 254#L183 assume ~id2~0 != ~id4~0; 236#L184 assume ~id3~0 != ~id4~0;init_~tmp~0 := 1; 237#L162-1 init_#res := init_~tmp~0; 238#L255 main_#t~ret28 := init_#res;main_~i2~0 := main_#t~ret28;havoc main_#t~ret28; 239#L311 assume !(0 == main_~i2~0); 262#L311-2 ~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 := 0; 233#L321-2 [2021-08-27 16:59:21,294 INFO L793 eck$LassoCheckResult]: Loop: 233#L321-2 assume !!(main_~i2~0 < 8);havoc node1_#t~ite7, node1_~m1~0;havoc node1_~m1~0;node1_~m1~0 := ~nomsg~0; 220#L61 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 := ~p4_old~0;~p4_old~0 := ~nomsg~0; 221#L65 assume !(node1_~m1~0 != ~nomsg~0); 235#L65-1 ~mode1~0 := 0; 274#L61-2 havoc node2_#t~ite8, node2_~m2~0;havoc node2_~m2~0;node2_~m2~0 := ~nomsg~0; 275#L87 assume 0 != ~mode2~0 % 256;node2_~m2~0 := ~p1_old~0;~p1_old~0 := ~nomsg~0; 280#L90 assume !(node2_~m2~0 != ~nomsg~0); 248#L90-1 ~mode2~0 := 0; 223#L87-2 havoc node3_#t~ite9, node3_~m3~0;havoc node3_~m3~0;node3_~m3~0 := ~nomsg~0; 224#L112 assume !(0 != ~mode3~0 % 256); 241#L125 assume ~send3~0 != ~nomsg~0 && ~p3_new~0 == ~nomsg~0;node3_#t~ite9 := ~send3~0; 229#L125-2 ~p3_new~0 := (if node3_#t~ite9 % 256 <= 127 then node3_#t~ite9 % 256 else node3_#t~ite9 % 256 - 256);havoc node3_#t~ite9;~mode3~0 := 1; 230#L112-2 havoc node4_#t~ite10, node4_~m4~0;havoc node4_~m4~0;node4_~m4~0 := ~nomsg~0; 284#L137 assume !(0 != ~mode4~0 % 256); 263#L150 assume ~send4~0 != ~nomsg~0 && ~p4_new~0 == ~nomsg~0;node4_#t~ite10 := ~send4~0; 242#L150-2 ~p4_new~0 := (if node4_#t~ite10 % 256 <= 127 then node4_#t~ite10 % 256 else node4_#t~ite10 % 256 - 256);havoc node4_#t~ite10;~mode4~0 := 1; 243#L137-2 ~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;havoc check_#res;havoc check_~tmp~1;havoc check_~tmp~1; 276#L263 assume !(~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 <= 1);check_~tmp~1 := 0; 246#L263-1 check_#res := check_~tmp~1; 258#L283 main_#t~ret29 := check_#res;main_~c1~0 := main_#t~ret29;havoc main_#t~ret29;assert_#in~arg := (if 0 == main_~c1~0 then 0 else 1);havoc assert_~arg;assert_~arg := assert_#in~arg; 259#L348 assume !(0 == assert_~arg % 256); 251#L343 main_#t~post30 := main_~i2~0;main_~i2~0 := 1 + main_#t~post30;havoc main_#t~post30; 233#L321-2 [2021-08-27 16:59:21,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:59:21,295 INFO L82 PathProgramCache]: Analyzing trace with hash -24004505, now seen corresponding path program 1 times [2021-08-27 16:59:21,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:59:21,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680884367] [2021-08-27 16:59:21,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:59:21,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:59:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:59:21,326 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:59:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:59:21,361 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:59:21,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:59:21,362 INFO L82 PathProgramCache]: Analyzing trace with hash 712570273, now seen corresponding path program 1 times [2021-08-27 16:59:21,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:59:21,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061055432] [2021-08-27 16:59:21,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:59:21,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:59:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:59:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:59:21,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:59:21,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061055432] [2021-08-27 16:59:21,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061055432] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 16:59:21,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 16:59:21,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 16:59:21,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276942357] [2021-08-27 16:59:21,473 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 16:59:21,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:59:21,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 16:59:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 16:59:21,474 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. cyclomatic complexity: 26 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) [2021-08-27 16:59:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:59:21,505 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2021-08-27 16:59:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 16:59:21,505 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 74 states and 98 transitions. [2021-08-27 16:59:21,506 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 42 [2021-08-27 16:59:21,507 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 74 states to 71 states and 93 transitions. [2021-08-27 16:59:21,507 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 71 [2021-08-27 16:59:21,507 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 71 [2021-08-27 16:59:21,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 93 transitions. [2021-08-27 16:59:21,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 16:59:21,508 INFO L681 BuchiCegarLoop]: Abstraction has 71 states and 93 transitions. [2021-08-27 16:59:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states and 93 transitions. [2021-08-27 16:59:21,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-27 16:59:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 71 states have (on average 1.3098591549295775) internal successors, (93), 70 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:59:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2021-08-27 16:59:21,511 INFO L704 BuchiCegarLoop]: Abstraction has 71 states and 93 transitions. [2021-08-27 16:59:21,511 INFO L587 BuchiCegarLoop]: Abstraction has 71 states and 93 transitions. [2021-08-27 16:59:21,511 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 16:59:21,511 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 71 states and 93 transitions. [2021-08-27 16:59:21,512 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 42 [2021-08-27 16:59:21,512 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:59:21,512 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:59:21,513 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] [2021-08-27 16:59:21,513 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] [2021-08-27 16:59:21,513 INFO L791 eck$LassoCheckResult]: Stem: 435#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(32);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12);~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;~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]; 425#L-1 havoc main_#res;havoc main_#t~nondet11, main_#t~nondet12, main_#t~nondet13, main_#t~nondet14, main_#t~nondet15, main_#t~nondet16, main_#t~nondet17, main_#t~nondet18, main_#t~nondet19, main_#t~nondet20, main_#t~nondet21, main_#t~nondet22, main_#t~nondet23, main_#t~nondet24, main_#t~nondet25, main_#t~nondet26, main_#t~nondet27, main_#t~ret28, main_#t~ret29, main_#t~post30, main_~c1~0, main_~i2~0;havoc main_~c1~0;havoc main_~i2~0;main_~c1~0 := 0;~r1~0 := main_#t~nondet11;havoc main_#t~nondet11;~id1~0 := main_#t~nondet12;havoc main_#t~nondet12;~st1~0 := main_#t~nondet13;havoc main_#t~nondet13;~send1~0 := main_#t~nondet14;havoc main_#t~nondet14;~mode1~0 := main_#t~nondet15;havoc main_#t~nondet15;~id2~0 := main_#t~nondet16;havoc main_#t~nondet16;~st2~0 := main_#t~nondet17;havoc main_#t~nondet17;~send2~0 := main_#t~nondet18;havoc main_#t~nondet18;~mode2~0 := main_#t~nondet19;havoc main_#t~nondet19;~id3~0 := main_#t~nondet20;havoc main_#t~nondet20;~st3~0 := main_#t~nondet21;havoc main_#t~nondet21;~send3~0 := main_#t~nondet22;havoc main_#t~nondet22;~mode3~0 := main_#t~nondet23;havoc main_#t~nondet23;~id4~0 := main_#t~nondet24;havoc main_#t~nondet24;~st4~0 := main_#t~nondet25;havoc main_#t~nondet25;~send4~0 := main_#t~nondet26;havoc main_#t~nondet26;~mode4~0 := main_#t~nondet27;havoc main_#t~nondet27;havoc init_#res;havoc init_~tmp~0;havoc init_~tmp~0; 421#L162 assume 0 == ~r1~0; 422#L163 assume ~id1~0 >= 0; 397#L164 assume 0 == ~st1~0; 388#L165 assume ~send1~0 == ~id1~0; 389#L166 assume 0 == ~mode1~0 % 256; 401#L167 assume ~id2~0 >= 0; 382#L168 assume 0 == ~st2~0; 383#L169 assume ~send2~0 == ~id2~0; 442#L170 assume 0 == ~mode2~0 % 256; 428#L171 assume ~id3~0 >= 0; 426#L172 assume 0 == ~st3~0; 427#L173 assume ~send3~0 == ~id3~0; 439#L174 assume 0 == ~mode3~0 % 256; 375#L175 assume ~id4~0 >= 0; 376#L176 assume 0 == ~st4~0; 429#L177 assume ~send4~0 == ~id4~0; 417#L178 assume 0 == ~mode4~0 % 256; 418#L179 assume ~id1~0 != ~id2~0; 373#L180 assume ~id1~0 != ~id3~0; 374#L181 assume ~id1~0 != ~id4~0; 410#L182 assume ~id2~0 != ~id3~0; 411#L183 assume ~id2~0 != ~id4~0; 393#L184 assume ~id3~0 != ~id4~0;init_~tmp~0 := 1; 394#L162-1 init_#res := init_~tmp~0; 395#L255 main_#t~ret28 := init_#res;main_~i2~0 := main_#t~ret28;havoc main_#t~ret28; 396#L311 assume !(0 == main_~i2~0); 419#L311-2 ~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 := 0; 390#L321-2 [2021-08-27 16:59:21,513 INFO L793 eck$LassoCheckResult]: Loop: 390#L321-2 assume !!(main_~i2~0 < 8);havoc node1_#t~ite7, node1_~m1~0;havoc node1_~m1~0;node1_~m1~0 := ~nomsg~0; 377#L61 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 := ~p4_old~0;~p4_old~0 := ~nomsg~0; 378#L65 assume !(node1_~m1~0 != ~nomsg~0); 392#L65-1 ~mode1~0 := 0; 431#L61-2 havoc node2_#t~ite8, node2_~m2~0;havoc node2_~m2~0;node2_~m2~0 := ~nomsg~0; 432#L87 assume 0 != ~mode2~0 % 256;node2_~m2~0 := ~p1_old~0;~p1_old~0 := ~nomsg~0; 437#L90 assume !(node2_~m2~0 != ~nomsg~0); 405#L90-1 ~mode2~0 := 0; 380#L87-2 havoc node3_#t~ite9, node3_~m3~0;havoc node3_~m3~0;node3_~m3~0 := ~nomsg~0; 381#L112 assume 0 != ~mode3~0 % 256;node3_~m3~0 := ~p2_old~0;~p2_old~0 := ~nomsg~0; 436#L115 assume !(node3_~m3~0 != ~nomsg~0); 413#L115-1 ~mode3~0 := 0; 387#L112-2 havoc node4_#t~ite10, node4_~m4~0;havoc node4_~m4~0;node4_~m4~0 := ~nomsg~0; 441#L137 assume !(0 != ~mode4~0 % 256); 420#L150 assume ~send4~0 != ~nomsg~0 && ~p4_new~0 == ~nomsg~0;node4_#t~ite10 := ~send4~0; 399#L150-2 ~p4_new~0 := (if node4_#t~ite10 % 256 <= 127 then node4_#t~ite10 % 256 else node4_#t~ite10 % 256 - 256);havoc node4_#t~ite10;~mode4~0 := 1; 400#L137-2 ~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;havoc check_#res;havoc check_~tmp~1;havoc check_~tmp~1; 433#L263 assume ~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 <= 1; 443#L264 assume ~r1~0 >= 4; 402#L268 assume ~r1~0 < 4;check_~tmp~1 := 1; 403#L263-1 check_#res := check_~tmp~1; 415#L283 main_#t~ret29 := check_#res;main_~c1~0 := main_#t~ret29;havoc main_#t~ret29;assert_#in~arg := (if 0 == main_~c1~0 then 0 else 1);havoc assert_~arg;assert_~arg := assert_#in~arg; 416#L348 assume !(0 == assert_~arg % 256); 408#L343 main_#t~post30 := main_~i2~0;main_~i2~0 := 1 + main_#t~post30;havoc main_#t~post30; 390#L321-2 [2021-08-27 16:59:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:59:21,514 INFO L82 PathProgramCache]: Analyzing trace with hash -24004505, now seen corresponding path program 2 times [2021-08-27 16:59:21,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:59:21,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083502208] [2021-08-27 16:59:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:59:21,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:59:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:59:21,527 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:59:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:59:21,542 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:59:21,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:59:21,543 INFO L82 PathProgramCache]: Analyzing trace with hash -2032251205, now seen corresponding path program 1 times [2021-08-27 16:59:21,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:59:21,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121997375] [2021-08-27 16:59:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:59:21,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:59:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:59:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:59:21,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:59:21,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121997375] [2021-08-27 16:59:21,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121997375] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 16:59:21,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 16:59:21,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 16:59:21,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790175162] [2021-08-27 16:59:21,563 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 16:59:21,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:59:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 16:59:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 16:59:21,564 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. cyclomatic complexity: 23 Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:59:21,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:59:21,578 INFO L93 Difference]: Finished difference Result 107 states and 146 transitions. [2021-08-27 16:59:21,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 16:59:21,579 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 107 states and 146 transitions. [2021-08-27 16:59:21,580 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 78 [2021-08-27 16:59:21,580 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 107 states to 107 states and 146 transitions. [2021-08-27 16:59:21,581 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 107 [2021-08-27 16:59:21,581 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 107 [2021-08-27 16:59:21,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 146 transitions. [2021-08-27 16:59:21,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 16:59:21,582 INFO L681 BuchiCegarLoop]: Abstraction has 107 states and 146 transitions. [2021-08-27 16:59:21,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 146 transitions. [2021-08-27 16:59:21,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-08-27 16:59:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 107 states have (on average 1.3644859813084111) internal successors, (146), 106 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:59:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 146 transitions. [2021-08-27 16:59:21,586 INFO L704 BuchiCegarLoop]: Abstraction has 107 states and 146 transitions. [2021-08-27 16:59:21,586 INFO L587 BuchiCegarLoop]: Abstraction has 107 states and 146 transitions. [2021-08-27 16:59:21,586 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 16:59:21,586 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 107 states and 146 transitions. [2021-08-27 16:59:21,586 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 78 [2021-08-27 16:59:21,587 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:59:21,587 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:59:21,587 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] [2021-08-27 16:59:21,587 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] [2021-08-27 16:59:21,588 INFO L791 eck$LassoCheckResult]: Stem: 621#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(32);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12);~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;~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]; 610#L-1 havoc main_#res;havoc main_#t~nondet11, main_#t~nondet12, main_#t~nondet13, main_#t~nondet14, main_#t~nondet15, main_#t~nondet16, main_#t~nondet17, main_#t~nondet18, main_#t~nondet19, main_#t~nondet20, main_#t~nondet21, main_#t~nondet22, main_#t~nondet23, main_#t~nondet24, main_#t~nondet25, main_#t~nondet26, main_#t~nondet27, main_#t~ret28, main_#t~ret29, main_#t~post30, main_~c1~0, main_~i2~0;havoc main_~c1~0;havoc main_~i2~0;main_~c1~0 := 0;~r1~0 := main_#t~nondet11;havoc main_#t~nondet11;~id1~0 := main_#t~nondet12;havoc main_#t~nondet12;~st1~0 := main_#t~nondet13;havoc main_#t~nondet13;~send1~0 := main_#t~nondet14;havoc main_#t~nondet14;~mode1~0 := main_#t~nondet15;havoc main_#t~nondet15;~id2~0 := main_#t~nondet16;havoc main_#t~nondet16;~st2~0 := main_#t~nondet17;havoc main_#t~nondet17;~send2~0 := main_#t~nondet18;havoc main_#t~nondet18;~mode2~0 := main_#t~nondet19;havoc main_#t~nondet19;~id3~0 := main_#t~nondet20;havoc main_#t~nondet20;~st3~0 := main_#t~nondet21;havoc main_#t~nondet21;~send3~0 := main_#t~nondet22;havoc main_#t~nondet22;~mode3~0 := main_#t~nondet23;havoc main_#t~nondet23;~id4~0 := main_#t~nondet24;havoc main_#t~nondet24;~st4~0 := main_#t~nondet25;havoc main_#t~nondet25;~send4~0 := main_#t~nondet26;havoc main_#t~nondet26;~mode4~0 := main_#t~nondet27;havoc main_#t~nondet27;havoc init_#res;havoc init_~tmp~0;havoc init_~tmp~0; 606#L162 assume 0 == ~r1~0; 607#L163 assume ~id1~0 >= 0; 581#L164 assume 0 == ~st1~0; 572#L165 assume ~send1~0 == ~id1~0; 573#L166 assume 0 == ~mode1~0 % 256; 585#L167 assume ~id2~0 >= 0; 566#L168 assume 0 == ~st2~0; 567#L169 assume ~send2~0 == ~id2~0; 630#L170 assume 0 == ~mode2~0 % 256; 613#L171 assume ~id3~0 >= 0; 611#L172 assume 0 == ~st3~0; 612#L173 assume ~send3~0 == ~id3~0; 627#L174 assume 0 == ~mode3~0 % 256; 562#L175 assume ~id4~0 >= 0; 563#L176 assume 0 == ~st4~0; 615#L177 assume ~send4~0 == ~id4~0; 601#L178 assume 0 == ~mode4~0 % 256; 602#L179 assume ~id1~0 != ~id2~0; 557#L180 assume ~id1~0 != ~id3~0; 558#L181 assume ~id1~0 != ~id4~0; 594#L182 assume ~id2~0 != ~id3~0; 600#L183 assume ~id2~0 != ~id4~0; 577#L184 assume ~id3~0 != ~id4~0;init_~tmp~0 := 1; 578#L162-1 init_#res := init_~tmp~0; 579#L255 main_#t~ret28 := init_#res;main_~i2~0 := main_#t~ret28;havoc main_#t~ret28; 580#L311 assume !(0 == main_~i2~0); 604#L311-2 ~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 := 0; 605#L321-2 [2021-08-27 16:59:21,588 INFO L793 eck$LassoCheckResult]: Loop: 605#L321-2 assume !!(main_~i2~0 < 8);havoc node1_#t~ite7, node1_~m1~0;havoc node1_~m1~0;node1_~m1~0 := ~nomsg~0; 659#L61 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 := ~p4_old~0;~p4_old~0 := ~nomsg~0; 560#L65 assume !(node1_~m1~0 != ~nomsg~0); 576#L65-1 ~mode1~0 := 0; 624#L61-2 havoc node2_#t~ite8, node2_~m2~0;havoc node2_~m2~0;node2_~m2~0 := ~nomsg~0; 656#L87 assume !(0 != ~mode2~0 % 256); 652#L100 assume ~send2~0 != ~nomsg~0 && ~p2_new~0 == ~nomsg~0;node2_#t~ite8 := ~send2~0; 651#L100-2 ~p2_new~0 := (if node2_#t~ite8 % 256 <= 127 then node2_#t~ite8 % 256 else node2_#t~ite8 % 256 - 256);havoc node2_#t~ite8;~mode2~0 := 1; 649#L87-2 havoc node3_#t~ite9, node3_~m3~0;havoc node3_~m3~0;node3_~m3~0 := ~nomsg~0; 648#L112 assume 0 != ~mode3~0 % 256;node3_~m3~0 := ~p2_old~0;~p2_old~0 := ~nomsg~0; 645#L115 assume !(node3_~m3~0 != ~nomsg~0); 642#L115-1 ~mode3~0 := 0; 641#L112-2 havoc node4_#t~ite10, node4_~m4~0;havoc node4_~m4~0;node4_~m4~0 := ~nomsg~0; 640#L137 assume !(0 != ~mode4~0 % 256); 636#L150 assume ~send4~0 != ~nomsg~0 && ~p4_new~0 == ~nomsg~0;node4_#t~ite10 := ~send4~0; 634#L150-2 ~p4_new~0 := (if node4_#t~ite10 % 256 <= 127 then node4_#t~ite10 % 256 else node4_#t~ite10 % 256 - 256);havoc node4_#t~ite10;~mode4~0 := 1; 633#L137-2 ~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;havoc check_#res;havoc check_~tmp~1;havoc check_~tmp~1; 632#L263 assume ~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 <= 1; 631#L264 assume !(~r1~0 >= 4); 592#L267 assume 0 == ~st1~0 + ~st2~0 + ~st3~0 + ~st4~0; 593#L268 assume ~r1~0 < 4;check_~tmp~1 := 1; 663#L263-1 check_#res := check_~tmp~1; 662#L283 main_#t~ret29 := check_#res;main_~c1~0 := main_#t~ret29;havoc main_#t~ret29;assert_#in~arg := (if 0 == main_~c1~0 then 0 else 1);havoc assert_~arg;assert_~arg := assert_#in~arg; 661#L348 assume !(0 == assert_~arg % 256); 660#L343 main_#t~post30 := main_~i2~0;main_~i2~0 := 1 + main_#t~post30;havoc main_#t~post30; 605#L321-2 [2021-08-27 16:59:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:59:21,588 INFO L82 PathProgramCache]: Analyzing trace with hash -24004505, now seen corresponding path program 3 times [2021-08-27 16:59:21,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:59:21,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603773467] [2021-08-27 16:59:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:59:21,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:59:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:59:21,613 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:59:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:59:21,630 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:59:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:59:21,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1484691695, now seen corresponding path program 1 times [2021-08-27 16:59:21,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:59:21,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627289649] [2021-08-27 16:59:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:59:21,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:59:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:59:21,638 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:59:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:59:21,647 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:59:21,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:59:21,648 INFO L82 PathProgramCache]: Analyzing trace with hash 526581577, now seen corresponding path program 1 times [2021-08-27 16:59:21,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:59:21,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48633429] [2021-08-27 16:59:21,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:59:21,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:59:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:59:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:59:21,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:59:21,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48633429] [2021-08-27 16:59:21,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48633429] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 16:59:21,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 16:59:21,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 16:59:21,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197153462] [2021-08-27 16:59:22,512 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:59:22,513 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:59:22,513 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:59:22,513 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:59:22,513 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:59:22,513 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:59:22,513 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:59:22,513 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:59:22,514 INFO L133 ssoRankerPreferences]: Filename of dumped script: pals_lcr.4.ufo.BOUNDED-8.pals.c_Iteration4_Loop [2021-08-27 16:59:22,514 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:59:22,514 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:59:22,531 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,539 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,578 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,598 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,604 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,609 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:22,731 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:23,075 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-08-27 16:59:26,813 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:59:26,813 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:59:26,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:59:26,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:59:26,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:59:26,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-08-27 16:59:26,852 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:59:26,852 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:59:26,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-08-27 16:59:26,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:59:26,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:59:26,881 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:59:26,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-08-27 16:59:26,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:59:26,883 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:59:26,910 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:59:26,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-08-27 16:59:26,916 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:59:26,916 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:59:26,916 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:59:26,916 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:59:26,916 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:59:26,916 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:59:26,916 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:59:26,916 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:59:26,916 INFO L133 ssoRankerPreferences]: Filename of dumped script: pals_lcr.4.ufo.BOUNDED-8.pals.c_Iteration4_Loop [2021-08-27 16:59:26,916 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:59:26,916 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:59:26,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,940 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,943 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,947 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,957 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,961 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,964 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,970 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:26,973 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:27,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:27,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:27,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:27,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:27,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:27,180 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:27,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:27,184 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:59:27,452 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-08-27 16:59:31,115 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:59:31,119 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:59:31,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:59:31,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:59:31,122 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:59:31,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-08-27 16:59:31,127 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:59:31,134 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:59:31,134 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:59:31,135 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:59:31,135 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:59:31,135 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:59:31,137 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:59:31,137 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:59:31,154 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:59:31,178 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 16:59:31,178 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 16:59:31,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:59:31,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:59:31,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:59:31,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-08-27 16:59:31,182 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:59:31,182 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:59:31,183 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:59:31,183 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i2~0) = -2*ULTIMATE.start_main_~i2~0 + 15 Supporting invariants [] [2021-08-27 16:59:31,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-08-27 16:59:31,202 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:59:31,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:59:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:59:31,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 16:59:31,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:59:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:59:31,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 16:59:31,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:59:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:59:31,568 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-27 16:59:31,569 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 107 states and 146 transitions. cyclomatic complexity: 40 Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:59:31,611 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 107 states and 146 transitions. cyclomatic complexity: 40. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 184 states and 263 transitions. Complement of second has 4 states. [2021-08-27 16:59:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 16:59:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:59:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2021-08-27 16:59:31,617 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 93 transitions. Stem has 29 letters. Loop has 25 letters. [2021-08-27 16:59:31,618 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:59:31,619 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 93 transitions. Stem has 54 letters. Loop has 25 letters. [2021-08-27 16:59:31,620 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:59:31,620 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 93 transitions. Stem has 29 letters. Loop has 50 letters. [2021-08-27 16:59:31,622 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:59:31,624 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 184 states and 263 transitions. [2021-08-27 16:59:31,627 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 16:59:31,627 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 184 states to 0 states and 0 transitions. [2021-08-27 16:59:31,627 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 16:59:31,627 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 16:59:31,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 16:59:31,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 16:59:31,628 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:59:31,628 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:59:31,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:59:31,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 16:59:31,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 16:59:31,629 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:59:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:59:31,629 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-08-27 16:59:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-27 16:59:31,629 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-08-27 16:59:31,629 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 16:59:31,629 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 16:59:31,630 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 16:59:31,630 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 16:59:31,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 16:59:31,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 16:59:31,630 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:59:31,630 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:59:31,630 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:59:31,630 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-27 16:59:31,630 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 16:59:31,630 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 16:59:31,630 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 16:59:31,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 04:59:31 BoogieIcfgContainer [2021-08-27 16:59:31,634 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 16:59:31,635 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 16:59:31,635 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 16:59:31,635 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 16:59:31,635 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:59:20" (3/4) ... [2021-08-27 16:59:31,637 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 16:59:31,637 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 16:59:31,639 INFO L168 Benchmark]: Toolchain (without parser) took 11800.33 ms. Allocated memory was 71.3 MB in the beginning and 287.3 MB in the end (delta: 216.0 MB). Free memory was 53.3 MB in the beginning and 172.2 MB in the end (delta: -118.9 MB). Peak memory consumption was 96.5 MB. Max. memory is 16.1 GB. [2021-08-27 16:59:31,639 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 71.3 MB. Free memory was 53.4 MB in the beginning and 53.4 MB in the end (delta: 41.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 16:59:31,640 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.34 ms. Allocated memory is still 71.3 MB. Free memory was 53.1 MB in the beginning and 52.9 MB in the end (delta: 246.9 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 16:59:31,640 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.56 ms. Allocated memory is still 71.3 MB. Free memory was 52.9 MB in the beginning and 50.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 16:59:31,643 INFO L168 Benchmark]: Boogie Preprocessor took 44.26 ms. Allocated memory is still 71.3 MB. Free memory was 50.7 MB in the beginning and 48.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 16:59:31,644 INFO L168 Benchmark]: RCFGBuilder took 442.80 ms. Allocated memory was 71.3 MB in the beginning and 94.4 MB in the end (delta: 23.1 MB). Free memory was 48.9 MB in the beginning and 61.0 MB in the end (delta: -12.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-08-27 16:59:31,644 INFO L168 Benchmark]: BuchiAutomizer took 11033.14 ms. Allocated memory was 94.4 MB in the beginning and 287.3 MB in the end (delta: 192.9 MB). Free memory was 61.0 MB in the beginning and 172.2 MB in the end (delta: -111.1 MB). Peak memory consumption was 80.6 MB. Max. memory is 16.1 GB. [2021-08-27 16:59:31,644 INFO L168 Benchmark]: Witness Printer took 2.39 ms. Allocated memory is still 287.3 MB. Free memory is still 172.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 16:59:31,646 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 71.3 MB. Free memory was 53.4 MB in the beginning and 53.4 MB in the end (delta: 41.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 230.34 ms. Allocated memory is still 71.3 MB. Free memory was 53.1 MB in the beginning and 52.9 MB in the end (delta: 246.9 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.56 ms. Allocated memory is still 71.3 MB. Free memory was 52.9 MB in the beginning and 50.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.26 ms. Allocated memory is still 71.3 MB. Free memory was 50.7 MB in the beginning and 48.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 442.80 ms. Allocated memory was 71.3 MB in the beginning and 94.4 MB in the end (delta: 23.1 MB). Free memory was 48.9 MB in the beginning and 61.0 MB in the end (delta: -12.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 11033.14 ms. Allocated memory was 94.4 MB in the beginning and 287.3 MB in the end (delta: 192.9 MB). Free memory was 61.0 MB in the beginning and 172.2 MB in the end (delta: -111.1 MB). Peak memory consumption was 80.6 MB. Max. memory is 16.1 GB. * Witness Printer took 2.39 ms. Allocated memory is still 287.3 MB. Free memory is still 172.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (4 trivial, 1 deterministic, 0 nondeterministic). One deterministic module has affine ranking function 15 + -2 * i2 and consists of 3 locations. 4 modules have a trivial ranking function, the largest among these consists of 5 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.9s and 5 iterations. TraceHistogramMax:1. Analysis of lassos took 10.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 5. Minimization of nondet autom 0. Automata minimization 16.3ms AutomataMinimizationTime, 3 MinimizatonAttempts, 42 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 107 states and ocurred in iteration 3. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 443 SDtfs, 278 SDslu, 752 SDs, 0 SdLazy, 46 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45.2ms Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT0 conc0 concLT1 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital194 mio100 ax124 hnf106 lsp57 ukn67 mio100 lsp100 div162 bol100 ite100 ukn100 eq171 hnf69 smp100 dnf5114 smp24 tf100 neg98 sie104 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 63ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 16:59:31,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-27 16:59:31,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...