./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/13-privatized_29-multiple-protecting2-vesal_true.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/13-privatized_29-multiple-protecting2-vesal_true.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a900e47bcb0579a731ecfed3c71b01054e5f0917c7f65049265d17494d326436 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 22:27:50,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 22:27:50,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 22:27:50,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 22:27:50,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 22:27:50,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 22:27:50,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 22:27:50,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 22:27:50,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 22:27:50,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 22:27:50,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 22:27:50,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 22:27:50,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 22:27:50,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 22:27:50,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 22:27:50,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 22:27:50,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 22:27:50,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 22:27:50,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 22:27:50,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 22:27:50,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 22:27:50,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 22:27:50,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 22:27:50,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 22:27:50,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 22:27:50,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 22:27:50,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 22:27:50,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 22:27:50,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 22:27:50,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 22:27:50,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 22:27:50,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 22:27:50,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 22:27:50,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 22:27:50,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 22:27:50,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 22:27:50,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 22:27:50,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 22:27:50,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 22:27:50,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 22:27:50,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 22:27:50,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 22:27:50,720 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 22:27:50,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 22:27:50,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 22:27:50,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 22:27:50,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 22:27:50,722 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 22:27:50,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 22:27:50,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 22:27:50,723 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 22:27:50,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 22:27:50,725 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 22:27:50,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 22:27:50,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 22:27:50,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 22:27:50,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 22:27:50,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 22:27:50,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 22:27:50,726 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 22:27:50,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 22:27:50,726 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 22:27:50,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 22:27:50,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 22:27:50,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 22:27:50,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 22:27:50,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:27:50,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 22:27:50,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 22:27:50,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 22:27:50,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 22:27:50,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 22:27:50,729 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 22:27:50,729 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 22:27:50,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 22:27:50,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 22:27:50,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a900e47bcb0579a731ecfed3c71b01054e5f0917c7f65049265d17494d326436 [2021-12-17 22:27:50,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 22:27:50,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 22:27:50,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 22:27:50,932 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 22:27:50,932 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 22:27:50,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/13-privatized_29-multiple-protecting2-vesal_true.i [2021-12-17 22:27:50,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0c905058/a58054802234485faf4383cbc033bb97/FLAGe09a1a10b [2021-12-17 22:27:51,399 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 22:27:51,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/13-privatized_29-multiple-protecting2-vesal_true.i [2021-12-17 22:27:51,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0c905058/a58054802234485faf4383cbc033bb97/FLAGe09a1a10b [2021-12-17 22:27:51,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0c905058/a58054802234485faf4383cbc033bb97 [2021-12-17 22:27:51,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 22:27:51,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 22:27:51,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 22:27:51,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 22:27:51,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 22:27:51,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:27:51" (1/1) ... [2021-12-17 22:27:51,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c7d116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51, skipping insertion in model container [2021-12-17 22:27:51,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:27:51" (1/1) ... [2021-12-17 22:27:51,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 22:27:51,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 22:27:51,613 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/goblint-regression/13-privatized_29-multiple-protecting2-vesal_true.i[1103,1116] [2021-12-17 22:27:51,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:27:51,706 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 22:27:51,714 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/goblint-regression/13-privatized_29-multiple-protecting2-vesal_true.i[1103,1116] [2021-12-17 22:27:51,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:27:51,770 INFO L208 MainTranslator]: Completed translation [2021-12-17 22:27:51,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51 WrapperNode [2021-12-17 22:27:51,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 22:27:51,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 22:27:51,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 22:27:51,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 22:27:51,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51" (1/1) ... [2021-12-17 22:27:51,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51" (1/1) ... [2021-12-17 22:27:51,801 INFO L137 Inliner]: procedures = 162, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2021-12-17 22:27:51,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 22:27:51,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 22:27:51,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 22:27:51,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 22:27:51,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51" (1/1) ... [2021-12-17 22:27:51,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51" (1/1) ... [2021-12-17 22:27:51,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51" (1/1) ... [2021-12-17 22:27:51,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51" (1/1) ... [2021-12-17 22:27:51,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51" (1/1) ... [2021-12-17 22:27:51,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51" (1/1) ... [2021-12-17 22:27:51,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51" (1/1) ... [2021-12-17 22:27:51,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 22:27:51,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 22:27:51,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 22:27:51,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 22:27:51,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51" (1/1) ... [2021-12-17 22:27:51,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:27:51,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:27:51,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 22:27:51,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 22:27:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 22:27:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2021-12-17 22:27:51,903 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2021-12-17 22:27:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 22:27:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-12-17 22:27:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 22:27:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 22:27:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 22:27:51,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 22:27:51,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 22:27:51,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 22:27:51,905 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 22:27:52,054 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 22:27:52,056 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 22:27:52,260 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 22:27:52,265 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 22:27:52,266 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 22:27:52,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:27:52 BoogieIcfgContainer [2021-12-17 22:27:52,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 22:27:52,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 22:27:52,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 22:27:52,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 22:27:52,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:27:51" (1/3) ... [2021-12-17 22:27:52,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4962aa0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:27:52, skipping insertion in model container [2021-12-17 22:27:52,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:27:51" (2/3) ... [2021-12-17 22:27:52,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4962aa0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:27:52, skipping insertion in model container [2021-12-17 22:27:52,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:27:52" (3/3) ... [2021-12-17 22:27:52,277 INFO L111 eAbstractionObserver]: Analyzing ICFG 13-privatized_29-multiple-protecting2-vesal_true.i [2021-12-17 22:27:52,284 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 22:27:52,284 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 22:27:52,284 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-12-17 22:27:52,284 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 22:27:52,306 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,306 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,306 WARN L322 ript$VariableManager]: TermVariabe t2_funThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,306 WARN L322 ript$VariableManager]: TermVariabe t2_funThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,307 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,307 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,307 WARN L322 ript$VariableManager]: TermVariabe t2_funThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,307 WARN L322 ript$VariableManager]: TermVariabe t2_funThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,307 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,307 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,307 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,308 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,308 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,308 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,308 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,308 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,308 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,309 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,309 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,309 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,309 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,309 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,310 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,310 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,310 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,310 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,310 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,311 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,311 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,311 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,311 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,311 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,312 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,312 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,312 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,312 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,314 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,315 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,315 WARN L322 ript$VariableManager]: TermVariabe t2_funThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,315 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,315 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,315 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,316 WARN L322 ript$VariableManager]: TermVariabe t2_funThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,316 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,316 WARN L322 ript$VariableManager]: TermVariabe |t2_funThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:27:52,319 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-12-17 22:27:52,349 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:27:52,354 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 22:27:52,354 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-17 22:27:52,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 112 places, 111 transitions, 230 flow [2021-12-17 22:27:52,406 INFO L129 PetriNetUnfolder]: 3/110 cut-off events. [2021-12-17 22:27:52,406 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-17 22:27:52,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 110 events. 3/110 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2021-12-17 22:27:52,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 111 transitions, 230 flow [2021-12-17 22:27:52,416 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 94 transitions, 191 flow [2021-12-17 22:27:52,428 INFO L129 PetriNetUnfolder]: 1/66 cut-off events. [2021-12-17 22:27:52,429 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-17 22:27:52,429 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:27:52,430 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:27:52,430 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-12-17 22:27:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:27:52,434 INFO L85 PathProgramCache]: Analyzing trace with hash -209547896, now seen corresponding path program 1 times [2021-12-17 22:27:52,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:27:52,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885267301] [2021-12-17 22:27:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:27:52,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:27:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:27:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:27:52,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:27:52,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885267301] [2021-12-17 22:27:52,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885267301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:27:52,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:27:52,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:27:52,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515327039] [2021-12-17 22:27:52,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:27:52,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:27:52,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:27:52,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:27:52,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:27:52,757 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 111 [2021-12-17 22:27:52,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 94 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 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) [2021-12-17 22:27:52,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:27:52,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 111 [2021-12-17 22:27:52,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:27:52,902 INFO L129 PetriNetUnfolder]: 62/305 cut-off events. [2021-12-17 22:27:52,902 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-17 22:27:52,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 305 events. 62/305 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1331 event pairs, 26 based on Foata normal form. 8/304 useless extension candidates. Maximal degree in co-relation 412. Up to 60 conditions per place. [2021-12-17 22:27:52,906 INFO L132 encePairwiseOnDemand]: 99/111 looper letters, 32 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2021-12-17 22:27:52,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 339 flow [2021-12-17 22:27:52,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 22:27:52,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 22:27:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 801 transitions. [2021-12-17 22:27:52,923 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8018018018018018 [2021-12-17 22:27:52,924 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 801 transitions. [2021-12-17 22:27:52,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 801 transitions. [2021-12-17 22:27:52,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:27:52,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 801 transitions. [2021-12-17 22:27:52,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 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) [2021-12-17 22:27:52,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 111.0) internal successors, (1110), 10 states have internal predecessors, (1110), 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) [2021-12-17 22:27:52,939 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 111.0) internal successors, (1110), 10 states have internal predecessors, (1110), 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) [2021-12-17 22:27:52,941 INFO L186 Difference]: Start difference. First operand has 96 places, 94 transitions, 191 flow. Second operand 9 states and 801 transitions. [2021-12-17 22:27:52,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 339 flow [2021-12-17 22:27:52,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 119 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-17 22:27:52,947 INFO L242 Difference]: Finished difference. Result has 105 places, 102 transitions, 270 flow [2021-12-17 22:27:52,949 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=270, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2021-12-17 22:27:52,952 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 9 predicate places. [2021-12-17 22:27:52,952 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 270 flow [2021-12-17 22:27:52,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 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) [2021-12-17 22:27:52,953 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:27:52,953 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:27:52,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 22:27:52,953 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-12-17 22:27:52,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:27:52,954 INFO L85 PathProgramCache]: Analyzing trace with hash 330090460, now seen corresponding path program 1 times [2021-12-17 22:27:52,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:27:52,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661057523] [2021-12-17 22:27:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:27:52,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:27:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:27:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:27:53,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:27:53,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661057523] [2021-12-17 22:27:53,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661057523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:27:53,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:27:53,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:27:53,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553547981] [2021-12-17 22:27:53,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:27:53,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:27:53,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:27:53,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:27:53,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:27:53,067 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 111 [2021-12-17 22:27:53,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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) [2021-12-17 22:27:53,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:27:53,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 111 [2021-12-17 22:27:53,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:27:53,189 INFO L129 PetriNetUnfolder]: 68/379 cut-off events. [2021-12-17 22:27:53,190 INFO L130 PetriNetUnfolder]: For 63/68 co-relation queries the response was YES. [2021-12-17 22:27:53,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 379 events. 68/379 cut-off events. For 63/68 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1812 event pairs, 20 based on Foata normal form. 9/385 useless extension candidates. Maximal degree in co-relation 597. Up to 72 conditions per place. [2021-12-17 22:27:53,193 INFO L132 encePairwiseOnDemand]: 101/111 looper letters, 32 selfloop transitions, 23 changer transitions 0/125 dead transitions. [2021-12-17 22:27:53,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 125 transitions, 448 flow [2021-12-17 22:27:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 22:27:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 22:27:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 797 transitions. [2021-12-17 22:27:53,196 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7977977977977978 [2021-12-17 22:27:53,196 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 797 transitions. [2021-12-17 22:27:53,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 797 transitions. [2021-12-17 22:27:53,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:27:53,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 797 transitions. [2021-12-17 22:27:53,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 88.55555555555556) internal successors, (797), 9 states have internal predecessors, (797), 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) [2021-12-17 22:27:53,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 111.0) internal successors, (1110), 10 states have internal predecessors, (1110), 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) [2021-12-17 22:27:53,201 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 111.0) internal successors, (1110), 10 states have internal predecessors, (1110), 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) [2021-12-17 22:27:53,201 INFO L186 Difference]: Start difference. First operand has 105 places, 102 transitions, 270 flow. Second operand 9 states and 797 transitions. [2021-12-17 22:27:53,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 125 transitions, 448 flow [2021-12-17 22:27:53,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 125 transitions, 448 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:27:53,208 INFO L242 Difference]: Finished difference. Result has 116 places, 113 transitions, 390 flow [2021-12-17 22:27:53,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=390, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2021-12-17 22:27:53,209 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 20 predicate places. [2021-12-17 22:27:53,209 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 390 flow [2021-12-17 22:27:53,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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) [2021-12-17 22:27:53,211 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:27:53,211 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:27:53,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 22:27:53,212 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-12-17 22:27:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:27:53,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1645473706, now seen corresponding path program 1 times [2021-12-17 22:27:53,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:27:53,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384819946] [2021-12-17 22:27:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:27:53,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:27:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:27:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:27:53,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:27:53,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384819946] [2021-12-17 22:27:53,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384819946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:27:53,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:27:53,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:27:53,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56597606] [2021-12-17 22:27:53,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:27:53,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:27:53,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:27:53,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:27:53,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:27:53,305 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 111 [2021-12-17 22:27:53,306 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 83.14285714285714) internal successors, (582), 7 states have internal predecessors, (582), 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) [2021-12-17 22:27:53,306 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:27:53,306 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 111 [2021-12-17 22:27:53,306 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:27:53,528 INFO L129 PetriNetUnfolder]: 90/492 cut-off events. [2021-12-17 22:27:53,528 INFO L130 PetriNetUnfolder]: For 244/249 co-relation queries the response was YES. [2021-12-17 22:27:53,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 492 events. 90/492 cut-off events. For 244/249 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2573 event pairs, 0 based on Foata normal form. 15/505 useless extension candidates. Maximal degree in co-relation 893. Up to 32 conditions per place. [2021-12-17 22:27:53,531 INFO L132 encePairwiseOnDemand]: 94/111 looper letters, 45 selfloop transitions, 60 changer transitions 15/189 dead transitions. [2021-12-17 22:27:53,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 189 transitions, 992 flow [2021-12-17 22:27:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 22:27:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-17 22:27:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1670 transitions. [2021-12-17 22:27:53,535 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7918444760550024 [2021-12-17 22:27:53,535 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1670 transitions. [2021-12-17 22:27:53,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1670 transitions. [2021-12-17 22:27:53,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:27:53,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1670 transitions. [2021-12-17 22:27:53,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 87.89473684210526) internal successors, (1670), 19 states have internal predecessors, (1670), 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) [2021-12-17 22:27:53,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 111.0) internal successors, (2220), 20 states have internal predecessors, (2220), 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) [2021-12-17 22:27:53,544 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 111.0) internal successors, (2220), 20 states have internal predecessors, (2220), 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) [2021-12-17 22:27:53,544 INFO L186 Difference]: Start difference. First operand has 116 places, 113 transitions, 390 flow. Second operand 19 states and 1670 transitions. [2021-12-17 22:27:53,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 189 transitions, 992 flow [2021-12-17 22:27:53,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 189 transitions, 988 flow, removed 2 selfloop flow, removed 0 redundant places. [2021-12-17 22:27:53,554 INFO L242 Difference]: Finished difference. Result has 145 places, 147 transitions, 786 flow [2021-12-17 22:27:53,554 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=786, PETRI_PLACES=145, PETRI_TRANSITIONS=147} [2021-12-17 22:27:53,556 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 49 predicate places. [2021-12-17 22:27:53,557 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 147 transitions, 786 flow [2021-12-17 22:27:53,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.14285714285714) internal successors, (582), 7 states have internal predecessors, (582), 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) [2021-12-17 22:27:53,559 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:27:53,559 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:27:53,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 22:27:53,560 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-12-17 22:27:53,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:27:53,561 INFO L85 PathProgramCache]: Analyzing trace with hash 670671853, now seen corresponding path program 1 times [2021-12-17 22:27:53,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:27:53,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14075190] [2021-12-17 22:27:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:27:53,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:27:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:27:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:27:53,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:27:53,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14075190] [2021-12-17 22:27:53,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14075190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:27:53,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:27:53,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:27:53,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11590205] [2021-12-17 22:27:53,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:27:53,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:27:53,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:27:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:27:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:27:53,655 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 111 [2021-12-17 22:27:53,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 147 transitions, 786 flow. Second operand has 6 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 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) [2021-12-17 22:27:53,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:27:53,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 111 [2021-12-17 22:27:53,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:27:53,726 INFO L129 PetriNetUnfolder]: 24/289 cut-off events. [2021-12-17 22:27:53,726 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2021-12-17 22:27:53,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 289 events. 24/289 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1007 event pairs, 11 based on Foata normal form. 10/298 useless extension candidates. Maximal degree in co-relation 582. Up to 49 conditions per place. [2021-12-17 22:27:53,728 INFO L132 encePairwiseOnDemand]: 101/111 looper letters, 19 selfloop transitions, 10 changer transitions 0/116 dead transitions. [2021-12-17 22:27:53,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 116 transitions, 529 flow [2021-12-17 22:27:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 22:27:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 22:27:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 418 transitions. [2021-12-17 22:27:53,730 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7531531531531531 [2021-12-17 22:27:53,730 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 418 transitions. [2021-12-17 22:27:53,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 418 transitions. [2021-12-17 22:27:53,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:27:53,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 418 transitions. [2021-12-17 22:27:53,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 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) [2021-12-17 22:27:53,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2021-12-17 22:27:53,732 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2021-12-17 22:27:53,732 INFO L186 Difference]: Start difference. First operand has 145 places, 147 transitions, 786 flow. Second operand 5 states and 418 transitions. [2021-12-17 22:27:53,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 116 transitions, 529 flow [2021-12-17 22:27:53,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 116 transitions, 429 flow, removed 19 selfloop flow, removed 19 redundant places. [2021-12-17 22:27:53,736 INFO L242 Difference]: Finished difference. Result has 124 places, 113 transitions, 397 flow [2021-12-17 22:27:53,737 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=397, PETRI_PLACES=124, PETRI_TRANSITIONS=113} [2021-12-17 22:27:53,737 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 28 predicate places. [2021-12-17 22:27:53,737 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 113 transitions, 397 flow [2021-12-17 22:27:53,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 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) [2021-12-17 22:27:53,738 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:27:53,738 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:27:53,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 22:27:53,738 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-12-17 22:27:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:27:53,739 INFO L85 PathProgramCache]: Analyzing trace with hash 565991624, now seen corresponding path program 1 times [2021-12-17 22:27:53,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:27:53,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170506050] [2021-12-17 22:27:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:27:53,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:27:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:27:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:27:53,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:27:53,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170506050] [2021-12-17 22:27:53,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170506050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:27:53,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:27:53,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 22:27:53,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182505319] [2021-12-17 22:27:53,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:27:53,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 22:27:53,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:27:53,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 22:27:53,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 22:27:53,830 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 111 [2021-12-17 22:27:53,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 113 transitions, 397 flow. Second operand has 9 states, 9 states have (on average 82.33333333333333) internal successors, (741), 9 states have internal predecessors, (741), 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) [2021-12-17 22:27:53,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:27:53,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 111 [2021-12-17 22:27:53,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:27:54,031 INFO L129 PetriNetUnfolder]: 6/206 cut-off events. [2021-12-17 22:27:54,032 INFO L130 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2021-12-17 22:27:54,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 206 events. 6/206 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 559 event pairs, 1 based on Foata normal form. 2/207 useless extension candidates. Maximal degree in co-relation 364. Up to 17 conditions per place. [2021-12-17 22:27:54,033 INFO L132 encePairwiseOnDemand]: 95/111 looper letters, 19 selfloop transitions, 34 changer transitions 0/122 dead transitions. [2021-12-17 22:27:54,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 122 transitions, 523 flow [2021-12-17 22:27:54,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 22:27:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-17 22:27:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1917 transitions. [2021-12-17 22:27:54,037 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7508813160987075 [2021-12-17 22:27:54,037 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1917 transitions. [2021-12-17 22:27:54,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1917 transitions. [2021-12-17 22:27:54,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:27:54,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1917 transitions. [2021-12-17 22:27:54,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 83.34782608695652) internal successors, (1917), 23 states have internal predecessors, (1917), 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) [2021-12-17 22:27:54,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 111.0) internal successors, (2664), 24 states have internal predecessors, (2664), 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) [2021-12-17 22:27:54,045 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 111.0) internal successors, (2664), 24 states have internal predecessors, (2664), 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) [2021-12-17 22:27:54,045 INFO L186 Difference]: Start difference. First operand has 124 places, 113 transitions, 397 flow. Second operand 23 states and 1917 transitions. [2021-12-17 22:27:54,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 122 transitions, 523 flow [2021-12-17 22:27:54,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 122 transitions, 503 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-17 22:27:54,048 INFO L242 Difference]: Finished difference. Result has 139 places, 115 transitions, 445 flow [2021-12-17 22:27:54,049 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=445, PETRI_PLACES=139, PETRI_TRANSITIONS=115} [2021-12-17 22:27:54,049 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 43 predicate places. [2021-12-17 22:27:54,049 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 115 transitions, 445 flow [2021-12-17 22:27:54,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 82.33333333333333) internal successors, (741), 9 states have internal predecessors, (741), 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) [2021-12-17 22:27:54,050 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:27:54,050 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:27:54,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 22:27:54,050 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-12-17 22:27:54,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:27:54,051 INFO L85 PathProgramCache]: Analyzing trace with hash -735792319, now seen corresponding path program 1 times [2021-12-17 22:27:54,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:27:54,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374406812] [2021-12-17 22:27:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:27:54,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:27:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:27:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:27:54,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:27:54,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374406812] [2021-12-17 22:27:54,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374406812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:27:54,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:27:54,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:27:54,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415902864] [2021-12-17 22:27:54,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:27:54,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:27:54,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:27:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:27:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:27:54,098 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 111 [2021-12-17 22:27:54,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 115 transitions, 445 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 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) [2021-12-17 22:27:54,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:27:54,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 111 [2021-12-17 22:27:54,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:27:54,197 INFO L129 PetriNetUnfolder]: 7/218 cut-off events. [2021-12-17 22:27:54,197 INFO L130 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2021-12-17 22:27:54,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 218 events. 7/218 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 656 event pairs, 1 based on Foata normal form. 1/218 useless extension candidates. Maximal degree in co-relation 409. Up to 20 conditions per place. [2021-12-17 22:27:54,198 INFO L132 encePairwiseOnDemand]: 96/111 looper letters, 23 selfloop transitions, 27 changer transitions 0/122 dead transitions. [2021-12-17 22:27:54,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 122 transitions, 565 flow [2021-12-17 22:27:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 22:27:54,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-17 22:27:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1277 transitions. [2021-12-17 22:27:54,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.766966966966967 [2021-12-17 22:27:54,202 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1277 transitions. [2021-12-17 22:27:54,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1277 transitions. [2021-12-17 22:27:54,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:27:54,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1277 transitions. [2021-12-17 22:27:54,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 85.13333333333334) internal successors, (1277), 15 states have internal predecessors, (1277), 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) [2021-12-17 22:27:54,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 111.0) internal successors, (1776), 16 states have internal predecessors, (1776), 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) [2021-12-17 22:27:54,207 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 111.0) internal successors, (1776), 16 states have internal predecessors, (1776), 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) [2021-12-17 22:27:54,207 INFO L186 Difference]: Start difference. First operand has 139 places, 115 transitions, 445 flow. Second operand 15 states and 1277 transitions. [2021-12-17 22:27:54,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 122 transitions, 565 flow [2021-12-17 22:27:54,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 122 transitions, 510 flow, removed 2 selfloop flow, removed 14 redundant places. [2021-12-17 22:27:54,211 INFO L242 Difference]: Finished difference. Result has 141 places, 118 transitions, 472 flow [2021-12-17 22:27:54,211 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=472, PETRI_PLACES=141, PETRI_TRANSITIONS=118} [2021-12-17 22:27:54,211 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 45 predicate places. [2021-12-17 22:27:54,212 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 118 transitions, 472 flow [2021-12-17 22:27:54,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 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) [2021-12-17 22:27:54,212 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:27:54,212 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:27:54,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 22:27:54,212 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-12-17 22:27:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:27:54,213 INFO L85 PathProgramCache]: Analyzing trace with hash 828029058, now seen corresponding path program 1 times [2021-12-17 22:27:54,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:27:54,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36796184] [2021-12-17 22:27:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:27:54,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:27:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:27:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:27:54,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:27:54,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36796184] [2021-12-17 22:27:54,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36796184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:27:54,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:27:54,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 22:27:54,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859214209] [2021-12-17 22:27:54,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:27:54,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 22:27:54,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:27:54,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 22:27:54,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 22:27:54,282 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 111 [2021-12-17 22:27:54,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 118 transitions, 472 flow. Second operand has 9 states, 9 states have (on average 82.77777777777777) internal successors, (745), 9 states have internal predecessors, (745), 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) [2021-12-17 22:27:54,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:27:54,283 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 111 [2021-12-17 22:27:54,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:27:54,437 INFO L129 PetriNetUnfolder]: 7/214 cut-off events. [2021-12-17 22:27:54,438 INFO L130 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2021-12-17 22:27:54,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 214 events. 7/214 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 625 event pairs, 1 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 419. Up to 19 conditions per place. [2021-12-17 22:27:54,439 INFO L132 encePairwiseOnDemand]: 95/111 looper letters, 17 selfloop transitions, 35 changer transitions 0/120 dead transitions. [2021-12-17 22:27:54,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 120 transitions, 576 flow [2021-12-17 22:27:54,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 22:27:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-17 22:27:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1748 transitions. [2021-12-17 22:27:54,442 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7498927498927499 [2021-12-17 22:27:54,442 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1748 transitions. [2021-12-17 22:27:54,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1748 transitions. [2021-12-17 22:27:54,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:27:54,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1748 transitions. [2021-12-17 22:27:54,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.23809523809524) internal successors, (1748), 21 states have internal predecessors, (1748), 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) [2021-12-17 22:27:54,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 111.0) internal successors, (2442), 22 states have internal predecessors, (2442), 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) [2021-12-17 22:27:54,450 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 111.0) internal successors, (2442), 22 states have internal predecessors, (2442), 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) [2021-12-17 22:27:54,450 INFO L186 Difference]: Start difference. First operand has 141 places, 118 transitions, 472 flow. Second operand 21 states and 1748 transitions. [2021-12-17 22:27:54,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 120 transitions, 576 flow [2021-12-17 22:27:54,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 120 transitions, 516 flow, removed 4 selfloop flow, removed 12 redundant places. [2021-12-17 22:27:54,453 INFO L242 Difference]: Finished difference. Result has 147 places, 116 transitions, 474 flow [2021-12-17 22:27:54,453 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=474, PETRI_PLACES=147, PETRI_TRANSITIONS=116} [2021-12-17 22:27:54,454 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 51 predicate places. [2021-12-17 22:27:54,454 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 116 transitions, 474 flow [2021-12-17 22:27:54,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 82.77777777777777) internal successors, (745), 9 states have internal predecessors, (745), 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) [2021-12-17 22:27:54,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:27:54,455 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:27:54,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 22:27:54,455 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-12-17 22:27:54,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:27:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1449404882, now seen corresponding path program 1 times [2021-12-17 22:27:54,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:27:54,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882797740] [2021-12-17 22:27:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:27:54,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:27:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:27:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:27:54,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:27:54,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882797740] [2021-12-17 22:27:54,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882797740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:27:54,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:27:54,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:27:54,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508681225] [2021-12-17 22:27:54,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:27:54,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:27:54,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:27:54,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:27:54,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:27:54,568 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 111 [2021-12-17 22:27:54,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 116 transitions, 474 flow. Second operand has 8 states, 8 states have (on average 74.375) internal successors, (595), 8 states have internal predecessors, (595), 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) [2021-12-17 22:27:54,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:27:54,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 111 [2021-12-17 22:27:54,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:27:54,651 INFO L129 PetriNetUnfolder]: 12/205 cut-off events. [2021-12-17 22:27:54,651 INFO L130 PetriNetUnfolder]: For 96/98 co-relation queries the response was YES. [2021-12-17 22:27:54,652 INFO L84 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 205 events. 12/205 cut-off events. For 96/98 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 501 event pairs, 1 based on Foata normal form. 13/218 useless extension candidates. Maximal degree in co-relation 387. Up to 37 conditions per place. [2021-12-17 22:27:54,653 INFO L132 encePairwiseOnDemand]: 105/111 looper letters, 28 selfloop transitions, 7 changer transitions 0/116 dead transitions. [2021-12-17 22:27:54,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 116 transitions, 528 flow [2021-12-17 22:27:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 22:27:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 22:27:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2021-12-17 22:27:54,654 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6921921921921922 [2021-12-17 22:27:54,654 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 461 transitions. [2021-12-17 22:27:54,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 461 transitions. [2021-12-17 22:27:54,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:27:54,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 461 transitions. [2021-12-17 22:27:54,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 76.83333333333333) internal successors, (461), 6 states have internal predecessors, (461), 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) [2021-12-17 22:27:54,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 states have internal predecessors, (777), 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) [2021-12-17 22:27:54,657 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 states have internal predecessors, (777), 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) [2021-12-17 22:27:54,657 INFO L186 Difference]: Start difference. First operand has 147 places, 116 transitions, 474 flow. Second operand 6 states and 461 transitions. [2021-12-17 22:27:54,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 116 transitions, 528 flow [2021-12-17 22:27:54,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 116 transitions, 455 flow, removed 3 selfloop flow, removed 21 redundant places. [2021-12-17 22:27:54,660 INFO L242 Difference]: Finished difference. Result has 131 places, 113 transitions, 387 flow [2021-12-17 22:27:54,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=131, PETRI_TRANSITIONS=113} [2021-12-17 22:27:54,661 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 35 predicate places. [2021-12-17 22:27:54,661 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 113 transitions, 387 flow [2021-12-17 22:27:54,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 74.375) internal successors, (595), 8 states have internal predecessors, (595), 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) [2021-12-17 22:27:54,661 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:27:54,661 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:27:54,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 22:27:54,662 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-12-17 22:27:54,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:27:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash 131069529, now seen corresponding path program 1 times [2021-12-17 22:27:54,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:27:54,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167762727] [2021-12-17 22:27:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:27:54,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:27:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:27:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:27:54,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:27:54,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167762727] [2021-12-17 22:27:54,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167762727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:27:54,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:27:54,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:27:54,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687373470] [2021-12-17 22:27:54,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:27:54,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:27:54,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:27:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:27:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:27:54,760 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 111 [2021-12-17 22:27:54,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 113 transitions, 387 flow. Second operand has 8 states, 8 states have (on average 83.5) internal successors, (668), 8 states have internal predecessors, (668), 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) [2021-12-17 22:27:54,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:27:54,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 111 [2021-12-17 22:27:54,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:27:54,898 INFO L129 PetriNetUnfolder]: 4/177 cut-off events. [2021-12-17 22:27:54,899 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2021-12-17 22:27:54,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 177 events. 4/177 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 391 event pairs, 1 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 308. Up to 21 conditions per place. [2021-12-17 22:27:54,899 INFO L132 encePairwiseOnDemand]: 97/111 looper letters, 0 selfloop transitions, 0 changer transitions 112/112 dead transitions. [2021-12-17 22:27:54,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 112 transitions, 475 flow [2021-12-17 22:27:54,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 22:27:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-17 22:27:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1330 transitions. [2021-12-17 22:27:54,901 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7488738738738738 [2021-12-17 22:27:54,902 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1330 transitions. [2021-12-17 22:27:54,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1330 transitions. [2021-12-17 22:27:54,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:27:54,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1330 transitions. [2021-12-17 22:27:54,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 83.125) internal successors, (1330), 16 states have internal predecessors, (1330), 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) [2021-12-17 22:27:54,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 111.0) internal successors, (1887), 17 states have internal predecessors, (1887), 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) [2021-12-17 22:27:54,906 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 111.0) internal successors, (1887), 17 states have internal predecessors, (1887), 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) [2021-12-17 22:27:54,906 INFO L186 Difference]: Start difference. First operand has 131 places, 113 transitions, 387 flow. Second operand 16 states and 1330 transitions. [2021-12-17 22:27:54,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 112 transitions, 475 flow [2021-12-17 22:27:54,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 112 transitions, 457 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-17 22:27:54,908 INFO L242 Difference]: Finished difference. Result has 139 places, 0 transitions, 0 flow [2021-12-17 22:27:54,909 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=139, PETRI_TRANSITIONS=0} [2021-12-17 22:27:54,909 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 43 predicate places. [2021-12-17 22:27:54,909 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 0 transitions, 0 flow [2021-12-17 22:27:54,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 83.5) internal successors, (668), 8 states have internal predecessors, (668), 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) [2021-12-17 22:27:54,911 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2021-12-17 22:27:54,912 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2021-12-17 22:27:54,912 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2021-12-17 22:27:54,912 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 4 remaining) [2021-12-17 22:27:54,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 22:27:54,915 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:27:54,916 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-17 22:27:54,916 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 22:27:54,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 10:27:54 BasicIcfg [2021-12-17 22:27:54,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 22:27:54,919 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 22:27:54,919 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 22:27:54,919 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 22:27:54,919 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:27:52" (3/4) ... [2021-12-17 22:27:54,921 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 22:27:54,925 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2_fun [2021-12-17 22:27:54,928 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-12-17 22:27:54,928 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-17 22:27:54,928 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 22:27:54,928 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 22:27:54,948 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 22:27:54,949 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 22:27:54,949 INFO L158 Benchmark]: Toolchain (without parser) took 3524.87ms. Allocated memory was 98.6MB in the beginning and 163.6MB in the end (delta: 65.0MB). Free memory was 67.9MB in the beginning and 114.2MB in the end (delta: -46.3MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. [2021-12-17 22:27:54,949 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory was 55.9MB in the beginning and 55.9MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 22:27:54,949 INFO L158 Benchmark]: CACSL2BoogieTranslator took 345.37ms. Allocated memory is still 98.6MB. Free memory was 67.7MB in the beginning and 65.0MB in the end (delta: 2.7MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. [2021-12-17 22:27:54,950 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.58ms. Allocated memory is still 98.6MB. Free memory was 65.0MB in the beginning and 62.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 22:27:54,950 INFO L158 Benchmark]: Boogie Preprocessor took 27.89ms. Allocated memory is still 98.6MB. Free memory was 62.9MB in the beginning and 61.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 22:27:54,950 INFO L158 Benchmark]: RCFGBuilder took 436.52ms. Allocated memory was 98.6MB in the beginning and 136.3MB in the end (delta: 37.7MB). Free memory was 61.5MB in the beginning and 111.4MB in the end (delta: -49.9MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2021-12-17 22:27:54,950 INFO L158 Benchmark]: TraceAbstraction took 2650.30ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 110.9MB in the beginning and 117.3MB in the end (delta: -6.5MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2021-12-17 22:27:54,951 INFO L158 Benchmark]: Witness Printer took 29.76ms. Allocated memory is still 163.6MB. Free memory was 117.3MB in the beginning and 114.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 22:27:54,952 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory was 55.9MB in the beginning and 55.9MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 345.37ms. Allocated memory is still 98.6MB. Free memory was 67.7MB in the beginning and 65.0MB in the end (delta: 2.7MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.58ms. Allocated memory is still 98.6MB. Free memory was 65.0MB in the beginning and 62.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.89ms. Allocated memory is still 98.6MB. Free memory was 62.9MB in the beginning and 61.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 436.52ms. Allocated memory was 98.6MB in the beginning and 136.3MB in the end (delta: 37.7MB). Free memory was 61.5MB in the beginning and 111.4MB in the end (delta: -49.9MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * TraceAbstraction took 2650.30ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 110.9MB in the beginning and 117.3MB in the end (delta: -6.5MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. * Witness Printer took 29.76ms. Allocated memory is still 163.6MB. Free memory was 117.3MB in the beginning and 114.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 129 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.6s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 416 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 416 mSDsluCounter, 441 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 338 mSDsCounter, 176 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 730 IncrementalHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 176 mSolverCounterUnsat, 122 mSDtfsCounter, 730 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=786occurred in iteration=3, InterpolantAutomatonStates: 123, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 595 NumberOfCodeBlocks, 595 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 586 ConstructedInterpolants, 0 QuantifiedInterpolants, 2107 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-17 22:27:54,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE