./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9db88713350d7306821dd75614e70e6b858505d66168ef8348e173e7f0890ab2 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 17:22:46,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 17:22:46,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 17:22:46,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 17:22:46,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 17:22:46,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 17:22:46,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 17:22:46,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 17:22:46,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 17:22:46,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 17:22:46,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 17:22:46,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 17:22:46,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 17:22:46,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 17:22:46,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 17:22:46,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 17:22:46,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 17:22:46,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 17:22:46,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 17:22:46,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 17:22:46,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 17:22:46,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 17:22:46,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 17:22:46,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 17:22:46,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 17:22:46,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 17:22:46,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 17:22:46,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 17:22:46,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 17:22:46,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 17:22:46,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 17:22:46,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 17:22:46,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 17:22:46,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 17:22:46,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 17:22:46,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 17:22:46,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 17:22:46,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 17:22:46,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 17:22:46,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 17:22:46,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 17:22:46,519 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-15 17:22:46,541 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 17:22:46,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 17:22:46,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 17:22:46,542 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 17:22:46,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 17:22:46,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 17:22:46,543 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 17:22:46,543 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-15 17:22:46,543 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-15 17:22:46,543 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-15 17:22:46,544 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-15 17:22:46,544 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-15 17:22:46,544 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-15 17:22:46,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 17:22:46,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 17:22:46,545 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 17:22:46,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 17:22:46,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 17:22:46,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 17:22:46,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-15 17:22:46,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-15 17:22:46,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-15 17:22:46,546 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 17:22:46,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 17:22:46,546 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-15 17:22:46,546 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 17:22:46,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-15 17:22:46,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 17:22:46,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 17:22:46,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 17:22:46,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 17:22:46,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 17:22:46,548 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-15 17:22:46,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db88713350d7306821dd75614e70e6b858505d66168ef8348e173e7f0890ab2 [2021-12-15 17:22:46,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 17:22:46,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 17:22:46,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 17:22:46,774 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 17:22:46,774 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 17:22:46,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c [2021-12-15 17:22:46,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c631dbf3/a68d8f6a277e4fec904cbf36c530b499/FLAG9742e1365 [2021-12-15 17:22:47,194 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 17:22:47,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c [2021-12-15 17:22:47,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c631dbf3/a68d8f6a277e4fec904cbf36c530b499/FLAG9742e1365 [2021-12-15 17:22:47,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c631dbf3/a68d8f6a277e4fec904cbf36c530b499 [2021-12-15 17:22:47,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 17:22:47,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 17:22:47,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 17:22:47,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 17:22:47,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 17:22:47,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a5ea91e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47, skipping insertion in model container [2021-12-15 17:22:47,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 17:22:47,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 17:22:47,399 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c[9529,9542] [2021-12-15 17:22:47,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 17:22:47,406 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 17:22:47,442 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c[9529,9542] [2021-12-15 17:22:47,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 17:22:47,452 INFO L208 MainTranslator]: Completed translation [2021-12-15 17:22:47,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47 WrapperNode [2021-12-15 17:22:47,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 17:22:47,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 17:22:47,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 17:22:47,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 17:22:47,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,494 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 306 [2021-12-15 17:22:47,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 17:22:47,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 17:22:47,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 17:22:47,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 17:22:47,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 17:22:47,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 17:22:47,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 17:22:47,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 17:22:47,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-15 17:22:47,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 17:22:47,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-15 17:22:47,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-15 17:22:47,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 17:22:47,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 17:22:47,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 17:22:47,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 17:22:47,722 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 17:22:47,723 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 17:22:47,962 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 17:22:47,967 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 17:22:47,967 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 17:22:47,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:22:47 BoogieIcfgContainer [2021-12-15 17:22:47,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 17:22:47,970 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-15 17:22:47,970 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-15 17:22:47,973 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-15 17:22:47,973 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 17:22:47,974 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.12 05:22:47" (1/3) ... [2021-12-15 17:22:47,974 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@75064327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.12 05:22:47, skipping insertion in model container [2021-12-15 17:22:47,974 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 17:22:47,975 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47" (2/3) ... [2021-12-15 17:22:47,975 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@75064327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.12 05:22:47, skipping insertion in model container [2021-12-15 17:22:47,975 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 17:22:47,975 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:22:47" (3/3) ... [2021-12-15 17:22:47,976 INFO L388 chiAutomizerObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c [2021-12-15 17:22:48,009 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-15 17:22:48,009 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-15 17:22:48,009 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-15 17:22:48,009 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-15 17:22:48,009 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-15 17:22:48,010 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-15 17:22:48,010 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-15 17:22:48,010 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-15 17:22:48,030 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 101 states, 100 states have (on average 1.68) internal successors, (168), 100 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 17:22:48,045 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 67 [2021-12-15 17:22:48,045 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:22:48,045 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:22:48,050 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:22:48,050 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:22:48,050 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-15 17:22:48,051 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 101 states, 100 states have (on average 1.68) internal successors, (168), 100 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 17:22:48,055 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 67 [2021-12-15 17:22:48,055 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:22:48,055 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:22:48,056 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:22:48,056 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:22:48,061 INFO L791 eck$LassoCheckResult]: Stem: 86#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(49, 2);call #Ultimate.allocInit(12, 3);~nomsg~0 := -1;~r1~0 := 0;~p1~0 := 0;~p1_old~0 := 0;~p1_new~0 := 0;~id1~0 := 0;~st1~0 := 0;~send1~0 := 0;~mode1~0 := 0;~alive1~0 := 0;~p2~0 := 0;~p2_old~0 := 0;~p2_new~0 := 0;~id2~0 := 0;~st2~0 := 0;~send2~0 := 0;~mode2~0 := 0;~alive2~0 := 0;~p3~0 := 0;~p3_old~0 := 0;~p3_new~0 := 0;~id3~0 := 0;~st3~0 := 0;~send3~0 := 0;~mode3~0 := 0;~alive3~0 := 0;~p4~0 := 0;~p4_old~0 := 0;~p4_new~0 := 0;~id4~0 := 0;~st4~0 := 0;~send4~0 := 0;~mode4~0 := 0;~alive4~0 := 0; 21#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_#t~nondet17#1, main_#t~nondet18#1, main_#t~nondet19#1, main_#t~nondet20#1, main_#t~nondet21#1, main_#t~nondet22#1, main_#t~nondet23#1, main_#t~nondet24#1, main_#t~nondet25#1, main_#t~nondet26#1, main_#t~nondet27#1, main_#t~nondet28#1, main_#t~nondet29#1, main_#t~nondet30#1, main_#t~nondet31#1, main_#t~nondet32#1, main_#t~ret33#1, main_#t~ret34#1, main_~c1~0#1, main_~i2~0#1;havoc main_~c1~0#1;havoc main_~i2~0#1;main_~c1~0#1 := 0;~r1~0 := main_#t~nondet12#1;havoc main_#t~nondet12#1;~id1~0 := main_#t~nondet13#1;havoc main_#t~nondet13#1;~st1~0 := main_#t~nondet14#1;havoc main_#t~nondet14#1;~send1~0 := main_#t~nondet15#1;havoc main_#t~nondet15#1;~mode1~0 := main_#t~nondet16#1;havoc main_#t~nondet16#1;~alive1~0 := main_#t~nondet17#1;havoc main_#t~nondet17#1;~id2~0 := main_#t~nondet18#1;havoc main_#t~nondet18#1;~st2~0 := main_#t~nondet19#1;havoc main_#t~nondet19#1;~send2~0 := main_#t~nondet20#1;havoc main_#t~nondet20#1;~mode2~0 := main_#t~nondet21#1;havoc main_#t~nondet21#1;~alive2~0 := main_#t~nondet22#1;havoc main_#t~nondet22#1;~id3~0 := main_#t~nondet23#1;havoc main_#t~nondet23#1;~st3~0 := main_#t~nondet24#1;havoc main_#t~nondet24#1;~send3~0 := main_#t~nondet25#1;havoc main_#t~nondet25#1;~mode3~0 := main_#t~nondet26#1;havoc main_#t~nondet26#1;~alive3~0 := main_#t~nondet27#1;havoc main_#t~nondet27#1;~id4~0 := main_#t~nondet28#1;havoc main_#t~nondet28#1;~st4~0 := main_#t~nondet29#1;havoc main_#t~nondet29#1;~send4~0 := main_#t~nondet30#1;havoc main_#t~nondet30#1;~mode4~0 := main_#t~nondet31#1;havoc main_#t~nondet31#1;~alive4~0 := main_#t~nondet32#1;havoc main_#t~nondet32#1;assume { :begin_inline_init } true;havoc init_#res#1;havoc init_~tmp~0#1;havoc init_~tmp~0#1; 78#L209true assume !(0 == ~r1~0 % 256);init_~tmp~0#1 := 0; 100#L209-1true init_#res#1 := init_~tmp~0#1; 96#L306true main_#t~ret33#1 := init_#res#1;assume { :end_inline_init } true;main_~i2~0#1 := main_#t~ret33#1;havoc main_#t~ret33#1;assume { :begin_inline_assume_abort_if_not } true;assume_abort_if_not_#in~cond#1 := main_~i2~0#1;havoc assume_abort_if_not_~cond#1;assume_abort_if_not_~cond#1 := assume_abort_if_not_#in~cond#1; 23#L22true assume !(0 == assume_abort_if_not_~cond#1); 69#L21true assume { :end_inline_assume_abort_if_not } true;~p1_old~0 := ~nomsg~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~nomsg~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~nomsg~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~nomsg~0;~p4_new~0 := ~nomsg~0;main_~i2~0#1 := 0; 91#L368-2true [2021-12-15 17:22:48,062 INFO L793 eck$LassoCheckResult]: Loop: 91#L368-2true assume !false;assume { :begin_inline_node1 } true;havoc node1_#t~ite4#1, node1_#t~ite5#1, node1_~m1~0#1;havoc node1_~m1~0#1;node1_~m1~0#1 := ~nomsg~0; 87#L68true assume !(0 != ~mode1~0 % 256); 15#L91true assume !(0 != ~alive1~0 % 256); 85#L94true assume !(~send1~0 != ~id1~0); 77#L94-2true ~mode1~0 := 1; 45#L68-2true assume { :end_inline_node1 } true;assume { :begin_inline_node2 } true;havoc node2_#t~ite6#1, node2_#t~ite7#1, node2_~m2~0#1;havoc node2_~m2~0#1;node2_~m2~0#1 := ~nomsg~0; 14#L108true assume 0 != ~mode2~0 % 256;node2_~m2~0#1 := ~p1_old~0;~p1_old~0 := ~nomsg~0; 12#L111true assume !(node2_~m2~0#1 != ~nomsg~0); 81#L111-1true ~mode2~0 := 0; 64#L108-2true assume { :end_inline_node2 } true;assume { :begin_inline_node3 } true;havoc node3_#t~ite8#1, node3_#t~ite9#1, node3_~m3~0#1;havoc node3_~m3~0#1;node3_~m3~0#1 := ~nomsg~0; 72#L142true assume 0 != ~mode3~0 % 256;node3_~m3~0#1 := ~p2_old~0;~p2_old~0 := ~nomsg~0; 34#L145true assume !(node3_~m3~0#1 != ~nomsg~0); 41#L145-1true ~mode3~0 := 0; 66#L142-2true assume { :end_inline_node3 } true;assume { :begin_inline_node4 } true;havoc node4_#t~ite10#1, node4_#t~ite11#1, node4_~m4~0#1;havoc node4_~m4~0#1;node4_~m4~0#1 := ~nomsg~0; 24#L176true assume 0 != ~mode4~0 % 256;node4_~m4~0#1 := ~p3_old~0;~p3_old~0 := ~nomsg~0; 88#L179true assume !(node4_~m4~0#1 != ~nomsg~0); 50#L179-1true ~mode4~0 := 0; 95#L176-2true assume { :end_inline_node4 } true;~p1_old~0 := ~p1_new~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~p2_new~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~p3_new~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~p4_new~0;~p4_new~0 := ~nomsg~0;assume { :begin_inline_check } true;havoc check_#res#1;havoc check_~tmp~1#1;havoc check_~tmp~1#1; 79#L314true assume !(~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 <= 1);check_~tmp~1#1 := 0; 32#L314-1true check_#res#1 := check_~tmp~1#1; 17#L326true main_#t~ret34#1 := check_#res#1;assume { :end_inline_check } true;main_~c1~0#1 := main_#t~ret34#1;havoc main_#t~ret34#1;assume { :begin_inline_assert } true;assert_#in~arg#1 := (if 0 == main_~c1~0#1 then 0 else 1);havoc assert_~arg#1;assert_~arg#1 := assert_#in~arg#1; 9#L394true assume !(0 == assert_~arg#1 % 256); 11#L389true assume { :end_inline_assert } true; 91#L368-2true [2021-12-15 17:22:48,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:48,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1938506578, now seen corresponding path program 1 times [2021-12-15 17:22:48,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:48,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306867913] [2021-12-15 17:22:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:48,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:22:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 17:22:48,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:22:48,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306867913] [2021-12-15 17:22:48,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306867913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:22:48,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:22:48,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 17:22:48,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826363547] [2021-12-15 17:22:48,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:22:48,227 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-15 17:22:48,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:48,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1367128501, now seen corresponding path program 1 times [2021-12-15 17:22:48,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:48,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144612706] [2021-12-15 17:22:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:48,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:22:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 17:22:48,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:22:48,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144612706] [2021-12-15 17:22:48,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144612706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:22:48,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:22:48,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 17:22:48,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595134157] [2021-12-15 17:22:48,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:22:48,348 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-15 17:22:48,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 17:22:48,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 17:22:48,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 17:22:48,372 INFO L87 Difference]: Start difference. First operand has 101 states, 100 states have (on average 1.68) internal successors, (168), 100 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 17:22:48,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 17:22:48,445 INFO L93 Difference]: Finished difference Result 100 states and 163 transitions. [2021-12-15 17:22:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 17:22:48,452 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 163 transitions. [2021-12-15 17:22:48,460 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 66 [2021-12-15 17:22:48,463 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 96 states and 136 transitions. [2021-12-15 17:22:48,463 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 96 [2021-12-15 17:22:48,464 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 96 [2021-12-15 17:22:48,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 136 transitions. [2021-12-15 17:22:48,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-15 17:22:48,464 INFO L681 BuchiCegarLoop]: Abstraction has 96 states and 136 transitions. [2021-12-15 17:22:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states and 136 transitions. [2021-12-15 17:22:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-15 17:22:48,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 96 states have (on average 1.4166666666666667) internal successors, (136), 95 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 17:22:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 136 transitions. [2021-12-15 17:22:48,486 INFO L704 BuchiCegarLoop]: Abstraction has 96 states and 136 transitions. [2021-12-15 17:22:48,486 INFO L587 BuchiCegarLoop]: Abstraction has 96 states and 136 transitions. [2021-12-15 17:22:48,486 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-15 17:22:48,486 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 96 states and 136 transitions. [2021-12-15 17:22:48,488 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 66 [2021-12-15 17:22:48,488 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:22:48,488 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:22:48,492 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:22:48,492 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:22:48,495 INFO L791 eck$LassoCheckResult]: Stem: 306#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(49, 2);call #Ultimate.allocInit(12, 3);~nomsg~0 := -1;~r1~0 := 0;~p1~0 := 0;~p1_old~0 := 0;~p1_new~0 := 0;~id1~0 := 0;~st1~0 := 0;~send1~0 := 0;~mode1~0 := 0;~alive1~0 := 0;~p2~0 := 0;~p2_old~0 := 0;~p2_new~0 := 0;~id2~0 := 0;~st2~0 := 0;~send2~0 := 0;~mode2~0 := 0;~alive2~0 := 0;~p3~0 := 0;~p3_old~0 := 0;~p3_new~0 := 0;~id3~0 := 0;~st3~0 := 0;~send3~0 := 0;~mode3~0 := 0;~alive3~0 := 0;~p4~0 := 0;~p4_old~0 := 0;~p4_new~0 := 0;~id4~0 := 0;~st4~0 := 0;~send4~0 := 0;~mode4~0 := 0;~alive4~0 := 0; 292#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_#t~nondet17#1, main_#t~nondet18#1, main_#t~nondet19#1, main_#t~nondet20#1, main_#t~nondet21#1, main_#t~nondet22#1, main_#t~nondet23#1, main_#t~nondet24#1, main_#t~nondet25#1, main_#t~nondet26#1, main_#t~nondet27#1, main_#t~nondet28#1, main_#t~nondet29#1, main_#t~nondet30#1, main_#t~nondet31#1, main_#t~nondet32#1, main_#t~ret33#1, main_#t~ret34#1, main_~c1~0#1, main_~i2~0#1;havoc main_~c1~0#1;havoc main_~i2~0#1;main_~c1~0#1 := 0;~r1~0 := main_#t~nondet12#1;havoc main_#t~nondet12#1;~id1~0 := main_#t~nondet13#1;havoc main_#t~nondet13#1;~st1~0 := main_#t~nondet14#1;havoc main_#t~nondet14#1;~send1~0 := main_#t~nondet15#1;havoc main_#t~nondet15#1;~mode1~0 := main_#t~nondet16#1;havoc main_#t~nondet16#1;~alive1~0 := main_#t~nondet17#1;havoc main_#t~nondet17#1;~id2~0 := main_#t~nondet18#1;havoc main_#t~nondet18#1;~st2~0 := main_#t~nondet19#1;havoc main_#t~nondet19#1;~send2~0 := main_#t~nondet20#1;havoc main_#t~nondet20#1;~mode2~0 := main_#t~nondet21#1;havoc main_#t~nondet21#1;~alive2~0 := main_#t~nondet22#1;havoc main_#t~nondet22#1;~id3~0 := main_#t~nondet23#1;havoc main_#t~nondet23#1;~st3~0 := main_#t~nondet24#1;havoc main_#t~nondet24#1;~send3~0 := main_#t~nondet25#1;havoc main_#t~nondet25#1;~mode3~0 := main_#t~nondet26#1;havoc main_#t~nondet26#1;~alive3~0 := main_#t~nondet27#1;havoc main_#t~nondet27#1;~id4~0 := main_#t~nondet28#1;havoc main_#t~nondet28#1;~st4~0 := main_#t~nondet29#1;havoc main_#t~nondet29#1;~send4~0 := main_#t~nondet30#1;havoc main_#t~nondet30#1;~mode4~0 := main_#t~nondet31#1;havoc main_#t~nondet31#1;~alive4~0 := main_#t~nondet32#1;havoc main_#t~nondet32#1;assume { :begin_inline_init } true;havoc init_#res#1;havoc init_~tmp~0#1;havoc init_~tmp~0#1; 293#L209 assume 0 == ~r1~0 % 256; 238#L210 assume ~alive1~0 % 256 + ~alive2~0 % 256 + ~alive3~0 % 256 + ~alive4~0 % 256 >= 1; 239#L211 assume ~id1~0 >= 0; 224#L212 assume 0 == ~st1~0; 225#L213 assume ~send1~0 == ~id1~0; 309#L214 assume 0 == ~mode1~0 % 256; 310#L215 assume ~id2~0 >= 0; 290#L216 assume 0 == ~st2~0; 271#L217 assume ~send2~0 == ~id2~0; 272#L218 assume 0 == ~mode2~0 % 256; 294#L219 assume ~id3~0 >= 0; 313#L220 assume 0 == ~st3~0; 258#L221 assume ~send3~0 == ~id3~0; 256#L222 assume 0 == ~mode3~0 % 256; 257#L223 assume ~id4~0 >= 0; 243#L224 assume 0 == ~st4~0; 244#L225 assume ~send4~0 == ~id4~0; 241#L226 assume 0 == ~mode4~0 % 256; 242#L227 assume ~id1~0 != ~id2~0; 259#L228 assume ~id1~0 != ~id3~0; 260#L229 assume ~id1~0 != ~id4~0; 226#L230 assume ~id2~0 != ~id3~0; 227#L231 assume ~id2~0 != ~id4~0; 249#L232 assume ~id3~0 != ~id4~0;init_~tmp~0#1 := 1; 314#L209-1 init_#res#1 := init_~tmp~0#1; 311#L306 main_#t~ret33#1 := init_#res#1;assume { :end_inline_init } true;main_~i2~0#1 := main_#t~ret33#1;havoc main_#t~ret33#1;assume { :begin_inline_assume_abort_if_not } true;assume_abort_if_not_#in~cond#1 := main_~i2~0#1;havoc assume_abort_if_not_~cond#1;assume_abort_if_not_~cond#1 := assume_abort_if_not_#in~cond#1; 298#L22 assume !(0 == assume_abort_if_not_~cond#1); 284#L21 assume { :end_inline_assume_abort_if_not } true;~p1_old~0 := ~nomsg~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~nomsg~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~nomsg~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~nomsg~0;~p4_new~0 := ~nomsg~0;main_~i2~0#1 := 0; 254#L368-2 [2021-12-15 17:22:48,496 INFO L793 eck$LassoCheckResult]: Loop: 254#L368-2 assume !false;assume { :begin_inline_node1 } true;havoc node1_#t~ite4#1, node1_#t~ite5#1, node1_~m1~0#1;havoc node1_~m1~0#1;node1_~m1~0#1 := ~nomsg~0; 308#L68 assume !(0 != ~mode1~0 % 256); 273#L91 assume !(0 != ~alive1~0 % 256); 274#L94 assume !(~send1~0 != ~id1~0); 286#L94-2 ~mode1~0 := 1; 228#L68-2 assume { :end_inline_node1 } true;assume { :begin_inline_node2 } true;havoc node2_#t~ite6#1, node2_#t~ite7#1, node2_~m2~0#1;havoc node2_~m2~0#1;node2_~m2~0#1 := ~nomsg~0; 229#L108 assume 0 != ~mode2~0 % 256;node2_~m2~0#1 := ~p1_old~0;~p1_old~0 := ~nomsg~0; 268#L111 assume !(node2_~m2~0#1 != ~nomsg~0); 270#L111-1 ~mode2~0 := 0; 276#L108-2 assume { :end_inline_node2 } true;assume { :begin_inline_node3 } true;havoc node3_#t~ite8#1, node3_#t~ite9#1, node3_~m3~0#1;havoc node3_~m3~0#1;node3_~m3~0#1 := ~nomsg~0; 277#L142 assume 0 != ~mode3~0 % 256;node3_~m3~0#1 := ~p2_old~0;~p2_old~0 := ~nomsg~0; 287#L145 assume !(node3_~m3~0#1 != ~nomsg~0); 264#L145-1 ~mode3~0 := 0; 278#L142-2 assume { :end_inline_node3 } true;assume { :begin_inline_node4 } true;havoc node4_#t~ite10#1, node4_#t~ite11#1, node4_~m4~0#1;havoc node4_~m4~0#1;node4_~m4~0#1 := ~nomsg~0; 279#L176 assume 0 != ~mode4~0 % 256;node4_~m4~0#1 := ~p3_old~0;~p3_old~0 := ~nomsg~0; 302#L179 assume !(node4_~m4~0#1 != ~nomsg~0); 220#L179-1 ~mode4~0 := 0; 240#L176-2 assume { :end_inline_node4 } true;~p1_old~0 := ~p1_new~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~p2_new~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~p3_new~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~p4_new~0;~p4_new~0 := ~nomsg~0;assume { :begin_inline_check } true;havoc check_#res#1;havoc check_~tmp~1#1;havoc check_~tmp~1#1; 295#L314 assume !(~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 <= 1);check_~tmp~1#1 := 0; 296#L314-1 check_#res#1 := check_~tmp~1#1; 280#L326 main_#t~ret34#1 := check_#res#1;assume { :end_inline_check } true;main_~c1~0#1 := main_#t~ret34#1;havoc main_#t~ret34#1;assume { :begin_inline_assert } true;assert_#in~arg#1 := (if 0 == main_~c1~0#1 then 0 else 1);havoc assert_~arg#1;assert_~arg#1 := assert_#in~arg#1; 250#L394 assume !(0 == assert_~arg#1 % 256); 251#L389 assume { :end_inline_assert } true; 254#L368-2 [2021-12-15 17:22:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:48,496 INFO L85 PathProgramCache]: Analyzing trace with hash -805895157, now seen corresponding path program 1 times [2021-12-15 17:22:48,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:48,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999610327] [2021-12-15 17:22:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:48,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:22:48,527 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 17:22:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:22:48,593 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 17:22:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:48,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1367128501, now seen corresponding path program 2 times [2021-12-15 17:22:48,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:48,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833203500] [2021-12-15 17:22:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:48,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:22:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 17:22:48,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:22:48,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833203500] [2021-12-15 17:22:48,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833203500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:22:48,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:22:48,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 17:22:48,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919701242] [2021-12-15 17:22:48,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:22:48,649 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-15 17:22:48,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 17:22:48,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 17:22:48,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 17:22:48,650 INFO L87 Difference]: Start difference. First operand 96 states and 136 transitions. cyclomatic complexity: 41 Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 17:22:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 17:22:48,694 INFO L93 Difference]: Finished difference Result 99 states and 138 transitions. [2021-12-15 17:22:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 17:22:48,695 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 99 states and 138 transitions. [2021-12-15 17:22:48,696 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 66 [2021-12-15 17:22:48,697 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 99 states to 96 states and 134 transitions. [2021-12-15 17:22:48,697 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 96 [2021-12-15 17:22:48,697 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 96 [2021-12-15 17:22:48,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 134 transitions. [2021-12-15 17:22:48,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-15 17:22:48,697 INFO L681 BuchiCegarLoop]: Abstraction has 96 states and 134 transitions. [2021-12-15 17:22:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states and 134 transitions. [2021-12-15 17:22:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-15 17:22:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 96 states have (on average 1.3958333333333333) internal successors, (134), 95 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 17:22:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 134 transitions. [2021-12-15 17:22:48,701 INFO L704 BuchiCegarLoop]: Abstraction has 96 states and 134 transitions. [2021-12-15 17:22:48,701 INFO L587 BuchiCegarLoop]: Abstraction has 96 states and 134 transitions. [2021-12-15 17:22:48,701 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-15 17:22:48,701 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 96 states and 134 transitions. [2021-12-15 17:22:48,701 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 66 [2021-12-15 17:22:48,701 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:22:48,701 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:22:48,702 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:22:48,702 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] [2021-12-15 17:22:48,702 INFO L791 eck$LassoCheckResult]: Stem: 513#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(49, 2);call #Ultimate.allocInit(12, 3);~nomsg~0 := -1;~r1~0 := 0;~p1~0 := 0;~p1_old~0 := 0;~p1_new~0 := 0;~id1~0 := 0;~st1~0 := 0;~send1~0 := 0;~mode1~0 := 0;~alive1~0 := 0;~p2~0 := 0;~p2_old~0 := 0;~p2_new~0 := 0;~id2~0 := 0;~st2~0 := 0;~send2~0 := 0;~mode2~0 := 0;~alive2~0 := 0;~p3~0 := 0;~p3_old~0 := 0;~p3_new~0 := 0;~id3~0 := 0;~st3~0 := 0;~send3~0 := 0;~mode3~0 := 0;~alive3~0 := 0;~p4~0 := 0;~p4_old~0 := 0;~p4_new~0 := 0;~id4~0 := 0;~st4~0 := 0;~send4~0 := 0;~mode4~0 := 0;~alive4~0 := 0; 499#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_#t~nondet17#1, main_#t~nondet18#1, main_#t~nondet19#1, main_#t~nondet20#1, main_#t~nondet21#1, main_#t~nondet22#1, main_#t~nondet23#1, main_#t~nondet24#1, main_#t~nondet25#1, main_#t~nondet26#1, main_#t~nondet27#1, main_#t~nondet28#1, main_#t~nondet29#1, main_#t~nondet30#1, main_#t~nondet31#1, main_#t~nondet32#1, main_#t~ret33#1, main_#t~ret34#1, main_~c1~0#1, main_~i2~0#1;havoc main_~c1~0#1;havoc main_~i2~0#1;main_~c1~0#1 := 0;~r1~0 := main_#t~nondet12#1;havoc main_#t~nondet12#1;~id1~0 := main_#t~nondet13#1;havoc main_#t~nondet13#1;~st1~0 := main_#t~nondet14#1;havoc main_#t~nondet14#1;~send1~0 := main_#t~nondet15#1;havoc main_#t~nondet15#1;~mode1~0 := main_#t~nondet16#1;havoc main_#t~nondet16#1;~alive1~0 := main_#t~nondet17#1;havoc main_#t~nondet17#1;~id2~0 := main_#t~nondet18#1;havoc main_#t~nondet18#1;~st2~0 := main_#t~nondet19#1;havoc main_#t~nondet19#1;~send2~0 := main_#t~nondet20#1;havoc main_#t~nondet20#1;~mode2~0 := main_#t~nondet21#1;havoc main_#t~nondet21#1;~alive2~0 := main_#t~nondet22#1;havoc main_#t~nondet22#1;~id3~0 := main_#t~nondet23#1;havoc main_#t~nondet23#1;~st3~0 := main_#t~nondet24#1;havoc main_#t~nondet24#1;~send3~0 := main_#t~nondet25#1;havoc main_#t~nondet25#1;~mode3~0 := main_#t~nondet26#1;havoc main_#t~nondet26#1;~alive3~0 := main_#t~nondet27#1;havoc main_#t~nondet27#1;~id4~0 := main_#t~nondet28#1;havoc main_#t~nondet28#1;~st4~0 := main_#t~nondet29#1;havoc main_#t~nondet29#1;~send4~0 := main_#t~nondet30#1;havoc main_#t~nondet30#1;~mode4~0 := main_#t~nondet31#1;havoc main_#t~nondet31#1;~alive4~0 := main_#t~nondet32#1;havoc main_#t~nondet32#1;assume { :begin_inline_init } true;havoc init_#res#1;havoc init_~tmp~0#1;havoc init_~tmp~0#1; 500#L209 assume 0 == ~r1~0 % 256; 442#L210 assume ~alive1~0 % 256 + ~alive2~0 % 256 + ~alive3~0 % 256 + ~alive4~0 % 256 >= 1; 443#L211 assume ~id1~0 >= 0; 431#L212 assume 0 == ~st1~0; 432#L213 assume ~send1~0 == ~id1~0; 516#L214 assume 0 == ~mode1~0 % 256; 517#L215 assume ~id2~0 >= 0; 498#L216 assume 0 == ~st2~0; 478#L217 assume ~send2~0 == ~id2~0; 479#L218 assume 0 == ~mode2~0 % 256; 501#L219 assume ~id3~0 >= 0; 520#L220 assume 0 == ~st3~0; 465#L221 assume ~send3~0 == ~id3~0; 463#L222 assume 0 == ~mode3~0 % 256; 464#L223 assume ~id4~0 >= 0; 452#L224 assume 0 == ~st4~0; 453#L225 assume ~send4~0 == ~id4~0; 448#L226 assume 0 == ~mode4~0 % 256; 449#L227 assume ~id1~0 != ~id2~0; 466#L228 assume ~id1~0 != ~id3~0; 467#L229 assume ~id1~0 != ~id4~0; 438#L230 assume ~id2~0 != ~id3~0; 439#L231 assume ~id2~0 != ~id4~0; 456#L232 assume ~id3~0 != ~id4~0;init_~tmp~0#1 := 1; 521#L209-1 init_#res#1 := init_~tmp~0#1; 518#L306 main_#t~ret33#1 := init_#res#1;assume { :end_inline_init } true;main_~i2~0#1 := main_#t~ret33#1;havoc main_#t~ret33#1;assume { :begin_inline_assume_abort_if_not } true;assume_abort_if_not_#in~cond#1 := main_~i2~0#1;havoc assume_abort_if_not_~cond#1;assume_abort_if_not_~cond#1 := assume_abort_if_not_#in~cond#1; 504#L22 assume !(0 == assume_abort_if_not_~cond#1); 491#L21 assume { :end_inline_assume_abort_if_not } true;~p1_old~0 := ~nomsg~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~nomsg~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~nomsg~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~nomsg~0;~p4_new~0 := ~nomsg~0;main_~i2~0#1 := 0; 461#L368-2 [2021-12-15 17:22:48,702 INFO L793 eck$LassoCheckResult]: Loop: 461#L368-2 assume !false;assume { :begin_inline_node1 } true;havoc node1_#t~ite4#1, node1_#t~ite5#1, node1_~m1~0#1;havoc node1_~m1~0#1;node1_~m1~0#1 := ~nomsg~0; 515#L68 assume !(0 != ~mode1~0 % 256); 480#L91 assume !(0 != ~alive1~0 % 256); 481#L94 assume !(~send1~0 != ~id1~0); 494#L94-2 ~mode1~0 := 1; 440#L68-2 assume { :end_inline_node1 } true;assume { :begin_inline_node2 } true;havoc node2_#t~ite6#1, node2_#t~ite7#1, node2_~m2~0#1;havoc node2_~m2~0#1;node2_~m2~0#1 := ~nomsg~0; 441#L108 assume 0 != ~mode2~0 % 256;node2_~m2~0#1 := ~p1_old~0;~p1_old~0 := ~nomsg~0; 475#L111 assume !(node2_~m2~0#1 != ~nomsg~0); 477#L111-1 ~mode2~0 := 0; 483#L108-2 assume { :end_inline_node2 } true;assume { :begin_inline_node3 } true;havoc node3_#t~ite8#1, node3_#t~ite9#1, node3_~m3~0#1;havoc node3_~m3~0#1;node3_~m3~0#1 := ~nomsg~0; 484#L142 assume 0 != ~mode3~0 % 256;node3_~m3~0#1 := ~p2_old~0;~p2_old~0 := ~nomsg~0; 493#L145 assume !(node3_~m3~0#1 != ~nomsg~0); 471#L145-1 ~mode3~0 := 0; 485#L142-2 assume { :end_inline_node3 } true;assume { :begin_inline_node4 } true;havoc node4_#t~ite10#1, node4_#t~ite11#1, node4_~m4~0#1;havoc node4_~m4~0#1;node4_~m4~0#1 := ~nomsg~0; 486#L176 assume 0 != ~mode4~0 % 256;node4_~m4~0#1 := ~p3_old~0;~p3_old~0 := ~nomsg~0; 507#L179 assume !(node4_~m4~0#1 != ~nomsg~0); 427#L179-1 ~mode4~0 := 0; 447#L176-2 assume { :end_inline_node4 } true;~p1_old~0 := ~p1_new~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~p2_new~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~p3_new~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~p4_new~0;~p4_new~0 := ~nomsg~0;assume { :begin_inline_check } true;havoc check_#res#1;havoc check_~tmp~1#1;havoc check_~tmp~1#1; 502#L314 assume ~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 <= 1; 503#L315 assume ~r1~0 % 256 < 4;check_~tmp~1#1 := 1; 508#L314-1 check_#res#1 := check_~tmp~1#1; 487#L326 main_#t~ret34#1 := check_#res#1;assume { :end_inline_check } true;main_~c1~0#1 := main_#t~ret34#1;havoc main_#t~ret34#1;assume { :begin_inline_assert } true;assert_#in~arg#1 := (if 0 == main_~c1~0#1 then 0 else 1);havoc assert_~arg#1;assert_~arg#1 := assert_#in~arg#1; 457#L394 assume !(0 == assert_~arg#1 % 256); 458#L389 assume { :end_inline_assert } true; 461#L368-2 [2021-12-15 17:22:48,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:48,703 INFO L85 PathProgramCache]: Analyzing trace with hash -805895157, now seen corresponding path program 2 times [2021-12-15 17:22:48,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:48,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135260439] [2021-12-15 17:22:48,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:48,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:22:48,717 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 17:22:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:22:48,736 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 17:22:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:48,736 INFO L85 PathProgramCache]: Analyzing trace with hash -952016582, now seen corresponding path program 1 times [2021-12-15 17:22:48,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:48,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655768738] [2021-12-15 17:22:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:48,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:22:48,753 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 17:22:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:22:48,761 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 17:22:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:48,762 INFO L85 PathProgramCache]: Analyzing trace with hash -850434236, now seen corresponding path program 1 times [2021-12-15 17:22:48,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:48,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051168528] [2021-12-15 17:22:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:48,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:22:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 17:22:48,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:22:48,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051168528] [2021-12-15 17:22:48,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051168528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:22:48,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:22:48,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 17:22:48,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984542595] [2021-12-15 17:22:48,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:22:49,293 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.getTrivialTransFormula(TransFormulaBuilder.java:285) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck.synthesize(LassoCheck.java:548) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.checkLoopTermination(LassoCheck.java:944) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.(LassoCheck.java:834) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck.(LassoCheck.java:252) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiCegarLoop.iterate(BuchiCegarLoop.java:457) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.doTerminationAnalysis(BuchiAutomizerObserver.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.finish(BuchiAutomizerObserver.java:397) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 17:22:49,308 INFO L158 Benchmark]: Toolchain (without parser) took 2095.05ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 48.6MB in the beginning and 66.6MB in the end (delta: -18.0MB). Peak memory consumption was 37.3MB. Max. memory is 16.1GB. [2021-12-15 17:22:49,309 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory was 65.5MB in the beginning and 65.4MB in the end (delta: 80.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 17:22:49,314 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.04ms. Allocated memory is still 88.1MB. Free memory was 48.4MB in the beginning and 63.0MB in the end (delta: -14.5MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2021-12-15 17:22:49,315 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.62ms. Allocated memory is still 88.1MB. Free memory was 62.9MB in the beginning and 60.4MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 17:22:49,315 INFO L158 Benchmark]: Boogie Preprocessor took 20.67ms. Allocated memory is still 88.1MB. Free memory was 60.4MB in the beginning and 58.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 17:22:49,315 INFO L158 Benchmark]: RCFGBuilder took 452.75ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 58.3MB in the beginning and 70.5MB in the end (delta: -12.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-15 17:22:49,316 INFO L158 Benchmark]: BuchiAutomizer took 1336.43ms. Allocated memory is still 107.0MB. Free memory was 70.5MB in the beginning and 66.6MB in the end (delta: 3.9MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. [2021-12-15 17:22:49,321 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory was 65.5MB in the beginning and 65.4MB in the end (delta: 80.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 240.04ms. Allocated memory is still 88.1MB. Free memory was 48.4MB in the beginning and 63.0MB in the end (delta: -14.5MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.62ms. Allocated memory is still 88.1MB. Free memory was 62.9MB in the beginning and 60.4MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.67ms. Allocated memory is still 88.1MB. Free memory was 60.4MB in the beginning and 58.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 452.75ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 58.3MB in the beginning and 70.5MB in the end (delta: -12.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 1336.43ms. Allocated memory is still 107.0MB. Free memory was 70.5MB in the beginning and 66.6MB in the end (delta: 3.9MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 17:22:49,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis No suitable file found in config dir /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config using search string *Termination*32bit*_Bitvector*.epf No suitable settings file found using Termination*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable