./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/weaver/test-easy11.wvr.c -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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:55:54,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:55:54,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:55:54,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:55:54,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:55:54,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:55:54,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:55:54,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:55:54,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:55:54,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:55:54,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:55:54,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:55:54,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:55:54,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:55:54,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:55:54,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:55:54,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:55:54,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:55:54,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:55:54,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:55:54,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:55:54,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:55:54,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:55:54,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:55:54,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:55:54,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:55:54,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:55:54,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:55:54,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:55:54,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:55:54,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:55:54,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:55:54,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:55:54,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:55:54,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:55:54,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:55:54,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:55:54,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:55:54,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:55:54,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:55:54,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:55:54,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:55:54,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:55:54,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:55:54,858 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:55:54,858 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:55:54,859 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:55:54,859 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:55:54,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:55:54,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:55:54,860 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:55:54,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:55:54,860 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:55:54,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:55:54,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:55:54,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:55:54,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:55:54,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:55:54,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:55:54,861 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:55:54,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:55:54,861 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:55:54,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:55:54,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:55:54,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:55:54,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:55:54,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:55:54,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:55:54,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:55:54,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:55:54,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:55:54,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:55:54,863 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:55:54,863 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:55:54,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:55:54,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:55:54,864 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2021-12-14 16:55:55,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:55:55,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:55:55,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:55:55,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:55:55,060 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:55:55,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy11.wvr.c [2021-12-14 16:55:55,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0988295/6f99a660deeb42d582c878929e3953de/FLAGb11a603c0 [2021-12-14 16:55:55,422 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:55:55,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy11.wvr.c [2021-12-14 16:55:55,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0988295/6f99a660deeb42d582c878929e3953de/FLAGb11a603c0 [2021-12-14 16:55:55,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0988295/6f99a660deeb42d582c878929e3953de [2021-12-14 16:55:55,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:55:55,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:55:55,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:55:55,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:55:55,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:55:55,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:55:55" (1/1) ... [2021-12-14 16:55:55,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17bb209f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:55, skipping insertion in model container [2021-12-14 16:55:55,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:55:55" (1/1) ... [2021-12-14 16:55:55,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:55:55,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:55:56,037 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/weaver/test-easy11.wvr.c[2005,2018] [2021-12-14 16:55:56,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:55:56,044 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:55:56,059 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/weaver/test-easy11.wvr.c[2005,2018] [2021-12-14 16:55:56,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:55:56,071 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:55:56,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:56 WrapperNode [2021-12-14 16:55:56,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:55:56,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:55:56,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:55:56,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:55:56,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:56" (1/1) ... [2021-12-14 16:55:56,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:56" (1/1) ... [2021-12-14 16:55:56,102 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2021-12-14 16:55:56,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:55:56,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:55:56,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:55:56,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:55:56,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:56" (1/1) ... [2021-12-14 16:55:56,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:56" (1/1) ... [2021-12-14 16:55:56,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:56" (1/1) ... [2021-12-14 16:55:56,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:56" (1/1) ... [2021-12-14 16:55:56,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:56" (1/1) ... [2021-12-14 16:55:56,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:56" (1/1) ... [2021-12-14 16:55:56,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:56" (1/1) ... [2021-12-14 16:55:56,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:55:56,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:55:56,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:55:56,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:55:56,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:56" (1/1) ... [2021-12-14 16:55:56,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:55:56,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:55:56,172 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) [2021-12-14 16:55:56,191 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 [2021-12-14 16:55:56,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:55:56,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:55:56,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:55:56,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:55:56,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:55:56,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:55:56,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:55:56,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:55:56,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-14 16:55:56,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-14 16:55:56,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:55:56,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:55:56,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:55:56,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:55:56,206 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-14 16:55:56,285 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:55:56,286 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:55:56,415 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:55:56,420 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:55:56,421 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:55:56,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:55:56 BoogieIcfgContainer [2021-12-14 16:55:56,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:55:56,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:55:56,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:55:56,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:55:56,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:55:55" (1/3) ... [2021-12-14 16:55:56,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cac3c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:55:56, skipping insertion in model container [2021-12-14 16:55:56,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:56" (2/3) ... [2021-12-14 16:55:56,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cac3c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:55:56, skipping insertion in model container [2021-12-14 16:55:56,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:55:56" (3/3) ... [2021-12-14 16:55:56,432 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2021-12-14 16:55:56,450 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:55:56,451 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:55:56,451 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:55:56,451 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:55:56,481 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,481 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,482 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,482 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,482 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,482 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,482 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,483 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,483 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,483 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,483 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,484 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,484 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,484 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,484 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,484 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,484 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,485 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,485 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,485 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,485 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,485 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,485 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,486 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,486 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,486 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,487 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,487 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,487 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,487 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,487 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,487 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,488 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,488 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,488 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,488 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,488 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,488 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,489 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,489 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,489 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,489 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,489 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,489 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,490 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,490 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,490 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,490 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,492 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,493 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,496 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,496 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,496 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,496 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:56,499 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-14 16:55:56,530 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:55:56,535 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 [2021-12-14 16:55:56,536 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-14 16:55:56,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2021-12-14 16:55:56,602 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2021-12-14 16:55:56,602 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:55:56,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2021-12-14 16:55:56,605 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2021-12-14 16:55:56,608 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2021-12-14 16:55:56,623 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2021-12-14 16:55:56,624 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:55:56,624 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:56,624 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] [2021-12-14 16:55:56,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:56,632 INFO L85 PathProgramCache]: Analyzing trace with hash -384738625, now seen corresponding path program 1 times [2021-12-14 16:55:56,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:56,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561512026] [2021-12-14 16:55:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:56,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:56,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:56,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561512026] [2021-12-14 16:55:56,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561512026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:56,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:56,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:55:56,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522827170] [2021-12-14 16:55:56,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:56,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:55:56,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:56,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:55:56,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:55:56,848 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 87 [2021-12-14 16:55:56,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2021-12-14 16:55:56,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:56,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 87 [2021-12-14 16:55:56,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:56,888 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2021-12-14 16:55:56,889 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-14 16:55:56,889 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 72 events. 2/72 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 6/74 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2021-12-14 16:55:56,890 INFO L132 encePairwiseOnDemand]: 83/87 looper letters, 4 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2021-12-14 16:55:56,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 164 flow [2021-12-14 16:55:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:55:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-14 16:55:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 164 transitions. [2021-12-14 16:55:56,902 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2021-12-14 16:55:56,903 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 164 transitions. [2021-12-14 16:55:56,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 164 transitions. [2021-12-14 16:55:56,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:56,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 164 transitions. [2021-12-14 16:55:56,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 82.0) internal successors, (164), 2 states have internal predecessors, (164), 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) [2021-12-14 16:55:56,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-12-14 16:55:56,912 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-12-14 16:55:56,913 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 164 transitions. [2021-12-14 16:55:56,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 164 flow [2021-12-14 16:55:56,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:55:56,918 INFO L242 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2021-12-14 16:55:56,920 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2021-12-14 16:55:56,923 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2021-12-14 16:55:56,923 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2021-12-14 16:55:56,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2021-12-14 16:55:56,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:56,924 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] [2021-12-14 16:55:56,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:55:56,925 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:56,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1457758209, now seen corresponding path program 1 times [2021-12-14 16:55:56,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:56,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365971573] [2021-12-14 16:55:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:56,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:57,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:57,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365971573] [2021-12-14 16:55:57,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365971573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:57,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:57,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:55:57,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001901376] [2021-12-14 16:55:57,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:57,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:55:57,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:57,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:55:57,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:55:57,307 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:55:57,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:55:57,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:57,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:55:57,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:57,702 INFO L129 PetriNetUnfolder]: 108/359 cut-off events. [2021-12-14 16:55:57,702 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-12-14 16:55:57,704 INFO L84 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 359 events. 108/359 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1655 event pairs, 27 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 600. Up to 57 conditions per place. [2021-12-14 16:55:57,718 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 60 selfloop transitions, 16 changer transitions 8/125 dead transitions. [2021-12-14 16:55:57,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 431 flow [2021-12-14 16:55:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:55:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:55:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2021-12-14 16:55:57,726 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2021-12-14 16:55:57,726 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2021-12-14 16:55:57,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2021-12-14 16:55:57,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:57,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2021-12-14 16:55:57,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 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) [2021-12-14 16:55:57,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:55:57,736 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:55:57,736 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 14 states and 799 transitions. [2021-12-14 16:55:57,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 431 flow [2021-12-14 16:55:57,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:55:57,740 INFO L242 Difference]: Finished difference. Result has 92 places, 82 transitions, 241 flow [2021-12-14 16:55:57,741 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=241, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2021-12-14 16:55:57,742 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2021-12-14 16:55:57,742 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 241 flow [2021-12-14 16:55:57,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:55:57,743 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:57,743 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] [2021-12-14 16:55:57,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:55:57,744 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:57,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1178946693, now seen corresponding path program 2 times [2021-12-14 16:55:57,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:57,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123550284] [2021-12-14 16:55:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:57,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:57,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:57,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123550284] [2021-12-14 16:55:57,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123550284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:57,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:57,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:55:57,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280844671] [2021-12-14 16:55:57,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:57,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:55:57,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:55:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:55:58,004 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:55:58,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:55:58,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:58,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:55:58,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:58,319 INFO L129 PetriNetUnfolder]: 132/371 cut-off events. [2021-12-14 16:55:58,319 INFO L130 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2021-12-14 16:55:58,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 891 conditions, 371 events. 132/371 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1709 event pairs, 33 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 880. Up to 103 conditions per place. [2021-12-14 16:55:58,322 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 53 selfloop transitions, 23 changer transitions 8/125 dead transitions. [2021-12-14 16:55:58,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 125 transitions, 561 flow [2021-12-14 16:55:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:55:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:55:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2021-12-14 16:55:58,325 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2021-12-14 16:55:58,325 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2021-12-14 16:55:58,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2021-12-14 16:55:58,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:58,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2021-12-14 16:55:58,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 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) [2021-12-14 16:55:58,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:55:58,330 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:55:58,330 INFO L186 Difference]: Start difference. First operand has 92 places, 82 transitions, 241 flow. Second operand 14 states and 794 transitions. [2021-12-14 16:55:58,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 125 transitions, 561 flow [2021-12-14 16:55:58,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 125 transitions, 545 flow, removed 5 selfloop flow, removed 6 redundant places. [2021-12-14 16:55:58,336 INFO L242 Difference]: Finished difference. Result has 102 places, 93 transitions, 362 flow [2021-12-14 16:55:58,336 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=362, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2021-12-14 16:55:58,337 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 25 predicate places. [2021-12-14 16:55:58,337 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 362 flow [2021-12-14 16:55:58,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:55:58,338 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:58,338 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] [2021-12-14 16:55:58,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:55:58,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:58,339 INFO L85 PathProgramCache]: Analyzing trace with hash 260955159, now seen corresponding path program 3 times [2021-12-14 16:55:58,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:58,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860631802] [2021-12-14 16:55:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:58,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:58,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:58,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860631802] [2021-12-14 16:55:58,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860631802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:58,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:58,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-14 16:55:58,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673197724] [2021-12-14 16:55:58,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:58,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 16:55:58,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:58,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 16:55:58,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:55:58,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:55:58,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 93 transitions, 362 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 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) [2021-12-14 16:55:58,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:58,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:55:58,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:58,791 INFO L129 PetriNetUnfolder]: 158/413 cut-off events. [2021-12-14 16:55:58,792 INFO L130 PetriNetUnfolder]: For 478/478 co-relation queries the response was YES. [2021-12-14 16:55:58,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1234 conditions, 413 events. 158/413 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1856 event pairs, 44 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 1218. Up to 117 conditions per place. [2021-12-14 16:55:58,796 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 33 changer transitions 8/143 dead transitions. [2021-12-14 16:55:58,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 828 flow [2021-12-14 16:55:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:55:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:55:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2021-12-14 16:55:58,799 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2021-12-14 16:55:58,799 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2021-12-14 16:55:58,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2021-12-14 16:55:58,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:58,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2021-12-14 16:55:58,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 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) [2021-12-14 16:55:58,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:55:58,805 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:55:58,805 INFO L186 Difference]: Start difference. First operand has 102 places, 93 transitions, 362 flow. Second operand 14 states and 790 transitions. [2021-12-14 16:55:58,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 828 flow [2021-12-14 16:55:58,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 143 transitions, 763 flow, removed 10 selfloop flow, removed 9 redundant places. [2021-12-14 16:55:58,810 INFO L242 Difference]: Finished difference. Result has 110 places, 109 transitions, 547 flow [2021-12-14 16:55:58,811 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=547, PETRI_PLACES=110, PETRI_TRANSITIONS=109} [2021-12-14 16:55:58,812 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 33 predicate places. [2021-12-14 16:55:58,812 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 109 transitions, 547 flow [2021-12-14 16:55:58,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 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) [2021-12-14 16:55:58,812 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:58,813 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] [2021-12-14 16:55:58,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:55:58,813 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:58,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1891949299, now seen corresponding path program 4 times [2021-12-14 16:55:58,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:58,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206747058] [2021-12-14 16:55:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:58,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:58,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:58,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206747058] [2021-12-14 16:55:58,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206747058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:58,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:58,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:55:58,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012985379] [2021-12-14 16:55:58,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:58,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:55:58,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:58,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:55:58,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:55:58,986 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:55:58,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 109 transitions, 547 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:55:58,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:58,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:55:58,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:59,238 INFO L129 PetriNetUnfolder]: 166/461 cut-off events. [2021-12-14 16:55:59,238 INFO L130 PetriNetUnfolder]: For 829/838 co-relation queries the response was YES. [2021-12-14 16:55:59,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 461 events. 166/461 cut-off events. For 829/838 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2169 event pairs, 38 based on Foata normal form. 7/463 useless extension candidates. Maximal degree in co-relation 1495. Up to 129 conditions per place. [2021-12-14 16:55:59,242 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 38 changer transitions 8/151 dead transitions. [2021-12-14 16:55:59,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 151 transitions, 999 flow [2021-12-14 16:55:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:55:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:55:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2021-12-14 16:55:59,245 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2021-12-14 16:55:59,245 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2021-12-14 16:55:59,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2021-12-14 16:55:59,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:59,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2021-12-14 16:55:59,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 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) [2021-12-14 16:55:59,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:55:59,250 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:55:59,250 INFO L186 Difference]: Start difference. First operand has 110 places, 109 transitions, 547 flow. Second operand 14 states and 792 transitions. [2021-12-14 16:55:59,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 151 transitions, 999 flow [2021-12-14 16:55:59,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 151 transitions, 930 flow, removed 20 selfloop flow, removed 8 redundant places. [2021-12-14 16:55:59,257 INFO L242 Difference]: Finished difference. Result has 117 places, 114 transitions, 657 flow [2021-12-14 16:55:59,257 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=657, PETRI_PLACES=117, PETRI_TRANSITIONS=114} [2021-12-14 16:55:59,259 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 40 predicate places. [2021-12-14 16:55:59,260 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 114 transitions, 657 flow [2021-12-14 16:55:59,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:55:59,260 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:59,260 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] [2021-12-14 16:55:59,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:55:59,261 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:59,261 INFO L85 PathProgramCache]: Analyzing trace with hash -119401531, now seen corresponding path program 5 times [2021-12-14 16:55:59,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:59,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591166653] [2021-12-14 16:55:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:59,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:59,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:59,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591166653] [2021-12-14 16:55:59,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591166653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:59,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:59,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:55:59,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825317484] [2021-12-14 16:55:59,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:59,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:55:59,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:59,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:55:59,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:55:59,436 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:55:59,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 657 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:55:59,437 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:59,437 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:55:59,437 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:59,661 INFO L129 PetriNetUnfolder]: 170/473 cut-off events. [2021-12-14 16:55:59,661 INFO L130 PetriNetUnfolder]: For 999/1001 co-relation queries the response was YES. [2021-12-14 16:55:59,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1589 conditions, 473 events. 170/473 cut-off events. For 999/1001 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2306 event pairs, 36 based on Foata normal form. 3/472 useless extension candidates. Maximal degree in co-relation 1567. Up to 128 conditions per place. [2021-12-14 16:55:59,665 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 38 changer transitions 8/155 dead transitions. [2021-12-14 16:55:59,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 155 transitions, 1069 flow [2021-12-14 16:55:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:55:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:55:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2021-12-14 16:55:59,668 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2021-12-14 16:55:59,668 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2021-12-14 16:55:59,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2021-12-14 16:55:59,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:59,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2021-12-14 16:55:59,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 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) [2021-12-14 16:55:59,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:55:59,672 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:55:59,672 INFO L186 Difference]: Start difference. First operand has 117 places, 114 transitions, 657 flow. Second operand 14 states and 796 transitions. [2021-12-14 16:55:59,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 155 transitions, 1069 flow [2021-12-14 16:55:59,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 155 transitions, 985 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-12-14 16:55:59,677 INFO L242 Difference]: Finished difference. Result has 120 places, 115 transitions, 675 flow [2021-12-14 16:55:59,678 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=675, PETRI_PLACES=120, PETRI_TRANSITIONS=115} [2021-12-14 16:55:59,678 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 43 predicate places. [2021-12-14 16:55:59,678 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 115 transitions, 675 flow [2021-12-14 16:55:59,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:55:59,679 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:59,679 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] [2021-12-14 16:55:59,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:55:59,679 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:59,680 INFO L85 PathProgramCache]: Analyzing trace with hash 18414173, now seen corresponding path program 6 times [2021-12-14 16:55:59,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:59,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622706014] [2021-12-14 16:55:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:59,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:59,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:59,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622706014] [2021-12-14 16:55:59,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622706014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:59,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:59,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:55:59,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394597272] [2021-12-14 16:55:59,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:59,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:55:59,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:59,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:55:59,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:55:59,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:55:59,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 115 transitions, 675 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:55:59,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:59,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:55:59,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:00,125 INFO L129 PetriNetUnfolder]: 184/501 cut-off events. [2021-12-14 16:56:00,125 INFO L130 PetriNetUnfolder]: For 1248/1250 co-relation queries the response was YES. [2021-12-14 16:56:00,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1743 conditions, 501 events. 184/501 cut-off events. For 1248/1250 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2421 event pairs, 35 based on Foata normal form. 3/496 useless extension candidates. Maximal degree in co-relation 1720. Up to 143 conditions per place. [2021-12-14 16:56:00,131 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 43 changer transitions 7/154 dead transitions. [2021-12-14 16:56:00,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 154 transitions, 1138 flow [2021-12-14 16:56:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-14 16:56:00,134 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-14 16:56:00,134 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-14 16:56:00,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-14 16:56:00,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:00,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-14 16:56:00,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 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) [2021-12-14 16:56:00,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:00,139 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:00,140 INFO L186 Difference]: Start difference. First operand has 120 places, 115 transitions, 675 flow. Second operand 14 states and 793 transitions. [2021-12-14 16:56:00,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 154 transitions, 1138 flow [2021-12-14 16:56:00,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 1024 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-12-14 16:56:00,148 INFO L242 Difference]: Finished difference. Result has 124 places, 124 transitions, 817 flow [2021-12-14 16:56:00,148 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=817, PETRI_PLACES=124, PETRI_TRANSITIONS=124} [2021-12-14 16:56:00,149 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 47 predicate places. [2021-12-14 16:56:00,149 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 124 transitions, 817 flow [2021-12-14 16:56:00,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:00,150 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:00,150 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] [2021-12-14 16:56:00,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:56:00,150 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:00,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1414819111, now seen corresponding path program 7 times [2021-12-14 16:56:00,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:00,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619133414] [2021-12-14 16:56:00,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:00,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:00,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:00,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619133414] [2021-12-14 16:56:00,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619133414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:00,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:00,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:00,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185917687] [2021-12-14 16:56:00,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:00,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:00,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:00,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:00,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:00,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 124 transitions, 817 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:00,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:00,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:00,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:00,598 INFO L129 PetriNetUnfolder]: 183/506 cut-off events. [2021-12-14 16:56:00,598 INFO L130 PetriNetUnfolder]: For 1565/1574 co-relation queries the response was YES. [2021-12-14 16:56:00,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1845 conditions, 506 events. 183/506 cut-off events. For 1565/1574 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2506 event pairs, 38 based on Foata normal form. 7/508 useless extension candidates. Maximal degree in co-relation 1819. Up to 142 conditions per place. [2021-12-14 16:56:00,604 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 43 changer transitions 8/160 dead transitions. [2021-12-14 16:56:00,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 160 transitions, 1252 flow [2021-12-14 16:56:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2021-12-14 16:56:00,607 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2021-12-14 16:56:00,607 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2021-12-14 16:56:00,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2021-12-14 16:56:00,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:00,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2021-12-14 16:56:00,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 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) [2021-12-14 16:56:00,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:00,613 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:00,613 INFO L186 Difference]: Start difference. First operand has 124 places, 124 transitions, 817 flow. Second operand 14 states and 790 transitions. [2021-12-14 16:56:00,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 160 transitions, 1252 flow [2021-12-14 16:56:00,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1173 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-12-14 16:56:00,623 INFO L242 Difference]: Finished difference. Result has 128 places, 122 transitions, 825 flow [2021-12-14 16:56:00,624 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=825, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2021-12-14 16:56:00,624 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 51 predicate places. [2021-12-14 16:56:00,624 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 825 flow [2021-12-14 16:56:00,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:00,625 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:00,625 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] [2021-12-14 16:56:00,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:56:00,626 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:00,626 INFO L85 PathProgramCache]: Analyzing trace with hash -658866687, now seen corresponding path program 8 times [2021-12-14 16:56:00,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:00,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894734329] [2021-12-14 16:56:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:00,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:00,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894734329] [2021-12-14 16:56:00,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894734329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:00,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:00,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:00,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975582335] [2021-12-14 16:56:00,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:00,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:00,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:00,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:00,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:00,771 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:00,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 825 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:00,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:00,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:00,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:01,071 INFO L129 PetriNetUnfolder]: 185/494 cut-off events. [2021-12-14 16:56:01,071 INFO L130 PetriNetUnfolder]: For 1663/1665 co-relation queries the response was YES. [2021-12-14 16:56:01,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 494 events. 185/494 cut-off events. For 1663/1665 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2511 event pairs, 35 based on Foata normal form. 1/487 useless extension candidates. Maximal degree in co-relation 1832. Up to 134 conditions per place. [2021-12-14 16:56:01,077 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 46 changer transitions 8/161 dead transitions. [2021-12-14 16:56:01,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 161 transitions, 1255 flow [2021-12-14 16:56:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2021-12-14 16:56:01,082 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2021-12-14 16:56:01,082 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2021-12-14 16:56:01,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2021-12-14 16:56:01,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:01,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2021-12-14 16:56:01,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 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) [2021-12-14 16:56:01,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:01,089 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:01,089 INFO L186 Difference]: Start difference. First operand has 128 places, 122 transitions, 825 flow. Second operand 14 states and 799 transitions. [2021-12-14 16:56:01,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 161 transitions, 1255 flow [2021-12-14 16:56:01,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 161 transitions, 1155 flow, removed 6 selfloop flow, removed 12 redundant places. [2021-12-14 16:56:01,099 INFO L242 Difference]: Finished difference. Result has 129 places, 126 transitions, 892 flow [2021-12-14 16:56:01,100 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=892, PETRI_PLACES=129, PETRI_TRANSITIONS=126} [2021-12-14 16:56:01,101 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 52 predicate places. [2021-12-14 16:56:01,101 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 126 transitions, 892 flow [2021-12-14 16:56:01,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:01,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:01,102 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] [2021-12-14 16:56:01,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:56:01,102 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:01,103 INFO L85 PathProgramCache]: Analyzing trace with hash -865576139, now seen corresponding path program 9 times [2021-12-14 16:56:01,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:01,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116466103] [2021-12-14 16:56:01,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:01,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:01,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:01,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116466103] [2021-12-14 16:56:01,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116466103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:01,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:01,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:01,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43469427] [2021-12-14 16:56:01,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:01,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:01,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:01,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:01,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:01,280 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:01,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 126 transitions, 892 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:01,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:01,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:01,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:01,589 INFO L129 PetriNetUnfolder]: 187/535 cut-off events. [2021-12-14 16:56:01,589 INFO L130 PetriNetUnfolder]: For 1952/1956 co-relation queries the response was YES. [2021-12-14 16:56:01,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1975 conditions, 535 events. 187/535 cut-off events. For 1952/1956 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2831 event pairs, 29 based on Foata normal form. 3/533 useless extension candidates. Maximal degree in co-relation 1947. Up to 151 conditions per place. [2021-12-14 16:56:01,593 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 45 changer transitions 7/160 dead transitions. [2021-12-14 16:56:01,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 160 transitions, 1268 flow [2021-12-14 16:56:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2021-12-14 16:56:01,595 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2021-12-14 16:56:01,595 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2021-12-14 16:56:01,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2021-12-14 16:56:01,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:01,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2021-12-14 16:56:01,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 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) [2021-12-14 16:56:01,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:01,598 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:01,599 INFO L186 Difference]: Start difference. First operand has 129 places, 126 transitions, 892 flow. Second operand 14 states and 796 transitions. [2021-12-14 16:56:01,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 160 transitions, 1268 flow [2021-12-14 16:56:01,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 160 transitions, 1175 flow, removed 11 selfloop flow, removed 10 redundant places. [2021-12-14 16:56:01,605 INFO L242 Difference]: Finished difference. Result has 133 places, 128 transitions, 920 flow [2021-12-14 16:56:01,606 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=920, PETRI_PLACES=133, PETRI_TRANSITIONS=128} [2021-12-14 16:56:01,606 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 56 predicate places. [2021-12-14 16:56:01,606 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 128 transitions, 920 flow [2021-12-14 16:56:01,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:01,607 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:01,607 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] [2021-12-14 16:56:01,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:56:01,607 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash 251090105, now seen corresponding path program 10 times [2021-12-14 16:56:01,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:01,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751276825] [2021-12-14 16:56:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:01,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:01,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:01,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751276825] [2021-12-14 16:56:01,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751276825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:01,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:01,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:01,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202199869] [2021-12-14 16:56:01,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:01,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:01,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:01,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:01,736 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:01,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 128 transitions, 920 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:01,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:01,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:01,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:02,021 INFO L129 PetriNetUnfolder]: 186/542 cut-off events. [2021-12-14 16:56:02,021 INFO L130 PetriNetUnfolder]: For 2057/2059 co-relation queries the response was YES. [2021-12-14 16:56:02,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1995 conditions, 542 events. 186/542 cut-off events. For 2057/2059 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2885 event pairs, 34 based on Foata normal form. 3/537 useless extension candidates. Maximal degree in co-relation 1966. Up to 157 conditions per place. [2021-12-14 16:56:02,025 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 44 changer transitions 7/158 dead transitions. [2021-12-14 16:56:02,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 158 transitions, 1293 flow [2021-12-14 16:56:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2021-12-14 16:56:02,027 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2021-12-14 16:56:02,027 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2021-12-14 16:56:02,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2021-12-14 16:56:02,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:02,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2021-12-14 16:56:02,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 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) [2021-12-14 16:56:02,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:02,030 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:02,030 INFO L186 Difference]: Start difference. First operand has 133 places, 128 transitions, 920 flow. Second operand 14 states and 794 transitions. [2021-12-14 16:56:02,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 158 transitions, 1293 flow [2021-12-14 16:56:02,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 158 transitions, 1187 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-12-14 16:56:02,038 INFO L242 Difference]: Finished difference. Result has 135 places, 128 transitions, 925 flow [2021-12-14 16:56:02,038 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=925, PETRI_PLACES=135, PETRI_TRANSITIONS=128} [2021-12-14 16:56:02,038 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 58 predicate places. [2021-12-14 16:56:02,039 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 128 transitions, 925 flow [2021-12-14 16:56:02,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:02,039 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:02,039 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] [2021-12-14 16:56:02,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:56:02,040 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:02,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:02,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1581205593, now seen corresponding path program 11 times [2021-12-14 16:56:02,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:02,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54361656] [2021-12-14 16:56:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:02,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:02,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54361656] [2021-12-14 16:56:02,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54361656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:02,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:02,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:02,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675582720] [2021-12-14 16:56:02,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:02,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:02,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:02,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:02,168 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:02,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 128 transitions, 925 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:02,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:02,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:02,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:02,434 INFO L129 PetriNetUnfolder]: 185/532 cut-off events. [2021-12-14 16:56:02,435 INFO L130 PetriNetUnfolder]: For 2012/2016 co-relation queries the response was YES. [2021-12-14 16:56:02,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1985 conditions, 532 events. 185/532 cut-off events. For 2012/2016 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2821 event pairs, 27 based on Foata normal form. 3/530 useless extension candidates. Maximal degree in co-relation 1955. Up to 153 conditions per place. [2021-12-14 16:56:02,438 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 42 changer transitions 9/157 dead transitions. [2021-12-14 16:56:02,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 157 transitions, 1278 flow [2021-12-14 16:56:02,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2021-12-14 16:56:02,440 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2021-12-14 16:56:02,440 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2021-12-14 16:56:02,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2021-12-14 16:56:02,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:02,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2021-12-14 16:56:02,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 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) [2021-12-14 16:56:02,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:02,443 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:02,443 INFO L186 Difference]: Start difference. First operand has 135 places, 128 transitions, 925 flow. Second operand 14 states and 794 transitions. [2021-12-14 16:56:02,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 157 transitions, 1278 flow [2021-12-14 16:56:02,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 157 transitions, 1176 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-12-14 16:56:02,450 INFO L242 Difference]: Finished difference. Result has 135 places, 125 transitions, 882 flow [2021-12-14 16:56:02,450 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=882, PETRI_PLACES=135, PETRI_TRANSITIONS=125} [2021-12-14 16:56:02,451 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 58 predicate places. [2021-12-14 16:56:02,451 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 125 transitions, 882 flow [2021-12-14 16:56:02,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:02,451 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:02,452 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] [2021-12-14 16:56:02,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:56:02,452 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:02,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:02,452 INFO L85 PathProgramCache]: Analyzing trace with hash 848909437, now seen corresponding path program 12 times [2021-12-14 16:56:02,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:02,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375187910] [2021-12-14 16:56:02,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:02,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:02,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:02,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375187910] [2021-12-14 16:56:02,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375187910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:02,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:02,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:02,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996795147] [2021-12-14 16:56:02,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:02,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:02,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:02,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:02,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:02,583 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:02,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 125 transitions, 882 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:02,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:02,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:02,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:02,831 INFO L129 PetriNetUnfolder]: 179/489 cut-off events. [2021-12-14 16:56:02,832 INFO L130 PetriNetUnfolder]: For 1975/1977 co-relation queries the response was YES. [2021-12-14 16:56:02,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1886 conditions, 489 events. 179/489 cut-off events. For 1975/1977 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2509 event pairs, 38 based on Foata normal form. 1/481 useless extension candidates. Maximal degree in co-relation 1857. Up to 143 conditions per place. [2021-12-14 16:56:02,836 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 40 changer transitions 8/153 dead transitions. [2021-12-14 16:56:02,836 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 153 transitions, 1224 flow [2021-12-14 16:56:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2021-12-14 16:56:02,838 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2021-12-14 16:56:02,838 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2021-12-14 16:56:02,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2021-12-14 16:56:02,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:02,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2021-12-14 16:56:02,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 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) [2021-12-14 16:56:02,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:02,841 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:02,841 INFO L186 Difference]: Start difference. First operand has 135 places, 125 transitions, 882 flow. Second operand 14 states and 791 transitions. [2021-12-14 16:56:02,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 153 transitions, 1224 flow [2021-12-14 16:56:02,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1126 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-12-14 16:56:02,848 INFO L242 Difference]: Finished difference. Result has 134 places, 122 transitions, 843 flow [2021-12-14 16:56:02,849 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=843, PETRI_PLACES=134, PETRI_TRANSITIONS=122} [2021-12-14 16:56:02,849 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2021-12-14 16:56:02,849 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 122 transitions, 843 flow [2021-12-14 16:56:02,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:02,850 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:02,850 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] [2021-12-14 16:56:02,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:56:02,850 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:02,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:02,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1691382799, now seen corresponding path program 13 times [2021-12-14 16:56:02,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:02,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541939799] [2021-12-14 16:56:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:02,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:02,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:02,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541939799] [2021-12-14 16:56:02,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541939799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:02,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:02,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:02,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360415474] [2021-12-14 16:56:02,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:02,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:02,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:02,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:02,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:02,983 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:02,984 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 122 transitions, 843 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:02,984 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:02,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:02,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:03,259 INFO L129 PetriNetUnfolder]: 179/485 cut-off events. [2021-12-14 16:56:03,260 INFO L130 PetriNetUnfolder]: For 1903/1905 co-relation queries the response was YES. [2021-12-14 16:56:03,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1859 conditions, 485 events. 179/485 cut-off events. For 1903/1905 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2422 event pairs, 45 based on Foata normal form. 1/475 useless extension candidates. Maximal degree in co-relation 1830. Up to 142 conditions per place. [2021-12-14 16:56:03,264 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 42 changer transitions 8/154 dead transitions. [2021-12-14 16:56:03,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 154 transitions, 1228 flow [2021-12-14 16:56:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-14 16:56:03,265 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-14 16:56:03,265 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-14 16:56:03,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-14 16:56:03,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:03,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-14 16:56:03,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 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) [2021-12-14 16:56:03,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:03,269 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:03,269 INFO L186 Difference]: Start difference. First operand has 134 places, 122 transitions, 843 flow. Second operand 14 states and 793 transitions. [2021-12-14 16:56:03,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 154 transitions, 1228 flow [2021-12-14 16:56:03,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 154 transitions, 1132 flow, removed 6 selfloop flow, removed 11 redundant places. [2021-12-14 16:56:03,275 INFO L242 Difference]: Finished difference. Result has 136 places, 124 transitions, 888 flow [2021-12-14 16:56:03,276 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=888, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2021-12-14 16:56:03,276 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2021-12-14 16:56:03,276 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 888 flow [2021-12-14 16:56:03,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:03,277 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:03,277 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] [2021-12-14 16:56:03,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:56:03,277 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2114028907, now seen corresponding path program 14 times [2021-12-14 16:56:03,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:03,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586818890] [2021-12-14 16:56:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:03,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:03,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:03,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586818890] [2021-12-14 16:56:03,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586818890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:03,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:03,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:03,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228402581] [2021-12-14 16:56:03,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:03,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:03,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:03,406 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:03,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 888 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:03,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:03,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:03,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:03,644 INFO L129 PetriNetUnfolder]: 184/545 cut-off events. [2021-12-14 16:56:03,644 INFO L130 PetriNetUnfolder]: For 1989/1993 co-relation queries the response was YES. [2021-12-14 16:56:03,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 545 events. 184/545 cut-off events. For 1989/1993 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2911 event pairs, 41 based on Foata normal form. 3/540 useless extension candidates. Maximal degree in co-relation 1971. Up to 131 conditions per place. [2021-12-14 16:56:03,648 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 75 selfloop transitions, 40 changer transitions 7/163 dead transitions. [2021-12-14 16:56:03,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 163 transitions, 1319 flow [2021-12-14 16:56:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-14 16:56:03,650 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-14 16:56:03,650 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-14 16:56:03,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-14 16:56:03,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:03,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-14 16:56:03,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 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) [2021-12-14 16:56:03,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:03,653 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:03,653 INFO L186 Difference]: Start difference. First operand has 136 places, 124 transitions, 888 flow. Second operand 14 states and 793 transitions. [2021-12-14 16:56:03,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 163 transitions, 1319 flow [2021-12-14 16:56:03,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 1242 flow, removed 7 selfloop flow, removed 10 redundant places. [2021-12-14 16:56:03,661 INFO L242 Difference]: Finished difference. Result has 141 places, 127 transitions, 937 flow [2021-12-14 16:56:03,661 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=937, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2021-12-14 16:56:03,662 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 64 predicate places. [2021-12-14 16:56:03,662 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 937 flow [2021-12-14 16:56:03,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:03,662 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:03,662 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] [2021-12-14 16:56:03,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:56:03,663 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1376125007, now seen corresponding path program 15 times [2021-12-14 16:56:03,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:03,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313612372] [2021-12-14 16:56:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:03,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:03,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:03,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313612372] [2021-12-14 16:56:03,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313612372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:03,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:03,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:03,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203685199] [2021-12-14 16:56:03,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:03,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:03,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:03,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:03,796 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:03,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 937 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:03,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:03,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:03,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:04,061 INFO L129 PetriNetUnfolder]: 180/523 cut-off events. [2021-12-14 16:56:04,061 INFO L130 PetriNetUnfolder]: For 2055/2057 co-relation queries the response was YES. [2021-12-14 16:56:04,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 523 events. 180/523 cut-off events. For 2055/2057 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2835 event pairs, 49 based on Foata normal form. 1/513 useless extension candidates. Maximal degree in co-relation 1962. Up to 152 conditions per place. [2021-12-14 16:56:04,066 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 73 selfloop transitions, 41 changer transitions 7/162 dead transitions. [2021-12-14 16:56:04,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 162 transitions, 1364 flow [2021-12-14 16:56:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2021-12-14 16:56:04,067 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2021-12-14 16:56:04,068 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2021-12-14 16:56:04,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2021-12-14 16:56:04,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:04,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2021-12-14 16:56:04,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 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) [2021-12-14 16:56:04,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:04,071 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:04,071 INFO L186 Difference]: Start difference. First operand has 141 places, 127 transitions, 937 flow. Second operand 14 states and 792 transitions. [2021-12-14 16:56:04,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 162 transitions, 1364 flow [2021-12-14 16:56:04,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 162 transitions, 1272 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-12-14 16:56:04,080 INFO L242 Difference]: Finished difference. Result has 144 places, 129 transitions, 967 flow [2021-12-14 16:56:04,080 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=967, PETRI_PLACES=144, PETRI_TRANSITIONS=129} [2021-12-14 16:56:04,080 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-14 16:56:04,081 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 129 transitions, 967 flow [2021-12-14 16:56:04,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:04,082 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:04,082 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] [2021-12-14 16:56:04,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:56:04,082 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:04,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:04,083 INFO L85 PathProgramCache]: Analyzing trace with hash 145257315, now seen corresponding path program 16 times [2021-12-14 16:56:04,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:04,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357431968] [2021-12-14 16:56:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:04,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:04,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:04,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357431968] [2021-12-14 16:56:04,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357431968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:04,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:04,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:04,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885539076] [2021-12-14 16:56:04,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:04,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:04,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:04,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:04,232 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:04,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 129 transitions, 967 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:04,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:04,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:04,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:04,502 INFO L129 PetriNetUnfolder]: 179/519 cut-off events. [2021-12-14 16:56:04,502 INFO L130 PetriNetUnfolder]: For 2130/2132 co-relation queries the response was YES. [2021-12-14 16:56:04,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 519 events. 179/519 cut-off events. For 2130/2132 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2810 event pairs, 51 based on Foata normal form. 1/508 useless extension candidates. Maximal degree in co-relation 1983. Up to 156 conditions per place. [2021-12-14 16:56:04,506 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 38 changer transitions 8/158 dead transitions. [2021-12-14 16:56:04,506 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 158 transitions, 1356 flow [2021-12-14 16:56:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2021-12-14 16:56:04,508 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2021-12-14 16:56:04,508 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2021-12-14 16:56:04,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2021-12-14 16:56:04,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:04,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2021-12-14 16:56:04,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 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) [2021-12-14 16:56:04,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:04,511 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:04,511 INFO L186 Difference]: Start difference. First operand has 144 places, 129 transitions, 967 flow. Second operand 14 states and 788 transitions. [2021-12-14 16:56:04,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 158 transitions, 1356 flow [2021-12-14 16:56:04,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 1260 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-12-14 16:56:04,519 INFO L242 Difference]: Finished difference. Result has 144 places, 126 transitions, 922 flow [2021-12-14 16:56:04,519 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=922, PETRI_PLACES=144, PETRI_TRANSITIONS=126} [2021-12-14 16:56:04,520 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-14 16:56:04,520 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 126 transitions, 922 flow [2021-12-14 16:56:04,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:04,520 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:04,520 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] [2021-12-14 16:56:04,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:56:04,521 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:04,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash -730886041, now seen corresponding path program 17 times [2021-12-14 16:56:04,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:04,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946160852] [2021-12-14 16:56:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:04,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:04,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:04,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946160852] [2021-12-14 16:56:04,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946160852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:04,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:04,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:04,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203321978] [2021-12-14 16:56:04,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:04,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:04,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:04,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:04,672 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:04,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 126 transitions, 922 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:04,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:04,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:04,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:04,960 INFO L129 PetriNetUnfolder]: 186/568 cut-off events. [2021-12-14 16:56:04,960 INFO L130 PetriNetUnfolder]: For 2207/2211 co-relation queries the response was YES. [2021-12-14 16:56:04,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2101 conditions, 568 events. 186/568 cut-off events. For 2207/2211 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3211 event pairs, 39 based on Foata normal form. 3/563 useless extension candidates. Maximal degree in co-relation 2067. Up to 159 conditions per place. [2021-12-14 16:56:04,964 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 41 changer transitions 8/161 dead transitions. [2021-12-14 16:56:04,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 161 transitions, 1331 flow [2021-12-14 16:56:04,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:04,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 797 transitions. [2021-12-14 16:56:04,967 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6543513957307061 [2021-12-14 16:56:04,967 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 797 transitions. [2021-12-14 16:56:04,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 797 transitions. [2021-12-14 16:56:04,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:04,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 797 transitions. [2021-12-14 16:56:04,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.92857142857143) internal successors, (797), 14 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) [2021-12-14 16:56:04,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:04,971 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:04,971 INFO L186 Difference]: Start difference. First operand has 144 places, 126 transitions, 922 flow. Second operand 14 states and 797 transitions. [2021-12-14 16:56:04,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 161 transitions, 1331 flow [2021-12-14 16:56:04,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 161 transitions, 1243 flow, removed 6 selfloop flow, removed 11 redundant places. [2021-12-14 16:56:04,990 INFO L242 Difference]: Finished difference. Result has 145 places, 128 transitions, 953 flow [2021-12-14 16:56:04,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=953, PETRI_PLACES=145, PETRI_TRANSITIONS=128} [2021-12-14 16:56:04,990 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2021-12-14 16:56:04,991 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 128 transitions, 953 flow [2021-12-14 16:56:04,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:04,991 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:04,991 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] [2021-12-14 16:56:04,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:56:04,992 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1557368149, now seen corresponding path program 18 times [2021-12-14 16:56:04,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:04,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522456086] [2021-12-14 16:56:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:04,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:05,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:05,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522456086] [2021-12-14 16:56:05,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522456086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:05,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:05,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:05,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135897376] [2021-12-14 16:56:05,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:05,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:05,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:05,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:05,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:05,132 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:05,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 128 transitions, 953 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:05,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:05,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:05,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:05,397 INFO L129 PetriNetUnfolder]: 181/530 cut-off events. [2021-12-14 16:56:05,397 INFO L130 PetriNetUnfolder]: For 2310/2312 co-relation queries the response was YES. [2021-12-14 16:56:05,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2061 conditions, 530 events. 181/530 cut-off events. For 2310/2312 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2924 event pairs, 49 based on Foata normal form. 1/519 useless extension candidates. Maximal degree in co-relation 2025. Up to 166 conditions per place. [2021-12-14 16:56:05,402 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 38 changer transitions 8/156 dead transitions. [2021-12-14 16:56:05,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 156 transitions, 1316 flow [2021-12-14 16:56:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2021-12-14 16:56:05,403 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2021-12-14 16:56:05,404 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2021-12-14 16:56:05,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2021-12-14 16:56:05,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:05,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2021-12-14 16:56:05,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 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) [2021-12-14 16:56:05,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:05,406 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:05,407 INFO L186 Difference]: Start difference. First operand has 145 places, 128 transitions, 953 flow. Second operand 14 states and 790 transitions. [2021-12-14 16:56:05,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 156 transitions, 1316 flow [2021-12-14 16:56:05,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 156 transitions, 1218 flow, removed 10 selfloop flow, removed 12 redundant places. [2021-12-14 16:56:05,415 INFO L242 Difference]: Finished difference. Result has 146 places, 126 transitions, 916 flow [2021-12-14 16:56:05,416 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=916, PETRI_PLACES=146, PETRI_TRANSITIONS=126} [2021-12-14 16:56:05,416 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2021-12-14 16:56:05,417 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 126 transitions, 916 flow [2021-12-14 16:56:05,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:05,417 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:05,417 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] [2021-12-14 16:56:05,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:56:05,417 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:05,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash 134112017, now seen corresponding path program 19 times [2021-12-14 16:56:05,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:05,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208636658] [2021-12-14 16:56:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:05,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:05,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:05,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208636658] [2021-12-14 16:56:05,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208636658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:05,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:05,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-14 16:56:05,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416281125] [2021-12-14 16:56:05,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:05,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 16:56:05,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:05,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 16:56:05,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:56:05,562 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:05,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 126 transitions, 916 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 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) [2021-12-14 16:56:05,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:05,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:05,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:05,829 INFO L129 PetriNetUnfolder]: 180/525 cut-off events. [2021-12-14 16:56:05,829 INFO L130 PetriNetUnfolder]: For 2241/2243 co-relation queries the response was YES. [2021-12-14 16:56:05,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2030 conditions, 525 events. 180/525 cut-off events. For 2241/2243 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2874 event pairs, 46 based on Foata normal form. 1/515 useless extension candidates. Maximal degree in co-relation 1994. Up to 162 conditions per place. [2021-12-14 16:56:05,834 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 36 changer transitions 9/154 dead transitions. [2021-12-14 16:56:05,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 154 transitions, 1274 flow [2021-12-14 16:56:05,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2021-12-14 16:56:05,838 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2021-12-14 16:56:05,838 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2021-12-14 16:56:05,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2021-12-14 16:56:05,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:05,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2021-12-14 16:56:05,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 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) [2021-12-14 16:56:05,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:05,840 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:05,841 INFO L186 Difference]: Start difference. First operand has 146 places, 126 transitions, 916 flow. Second operand 14 states and 792 transitions. [2021-12-14 16:56:05,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 154 transitions, 1274 flow [2021-12-14 16:56:05,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 154 transitions, 1186 flow, removed 6 selfloop flow, removed 12 redundant places. [2021-12-14 16:56:05,848 INFO L242 Difference]: Finished difference. Result has 144 places, 123 transitions, 875 flow [2021-12-14 16:56:05,849 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=875, PETRI_PLACES=144, PETRI_TRANSITIONS=123} [2021-12-14 16:56:05,849 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-14 16:56:05,849 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 123 transitions, 875 flow [2021-12-14 16:56:05,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 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) [2021-12-14 16:56:05,850 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:05,850 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] [2021-12-14 16:56:05,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:56:05,850 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:05,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:05,850 INFO L85 PathProgramCache]: Analyzing trace with hash 386002791, now seen corresponding path program 20 times [2021-12-14 16:56:05,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:05,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669867487] [2021-12-14 16:56:05,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:05,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:05,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:05,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669867487] [2021-12-14 16:56:05,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669867487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:05,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:05,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 16:56:05,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090892977] [2021-12-14 16:56:05,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:05,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:56:05,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:06,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:56:06,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:56:06,001 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-14 16:56:06,001 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 123 transitions, 875 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:06,001 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:06,001 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-14 16:56:06,001 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:06,256 INFO L129 PetriNetUnfolder]: 180/555 cut-off events. [2021-12-14 16:56:06,256 INFO L130 PetriNetUnfolder]: For 2292/2296 co-relation queries the response was YES. [2021-12-14 16:56:06,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2057 conditions, 555 events. 180/555 cut-off events. For 2292/2296 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3080 event pairs, 38 based on Foata normal form. 3/549 useless extension candidates. Maximal degree in co-relation 2022. Up to 162 conditions per place. [2021-12-14 16:56:06,260 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 37 changer transitions 7/155 dead transitions. [2021-12-14 16:56:06,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 155 transitions, 1262 flow [2021-12-14 16:56:06,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:56:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:56:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-14 16:56:06,261 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-14 16:56:06,262 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-14 16:56:06,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-14 16:56:06,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:06,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-14 16:56:06,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 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) [2021-12-14 16:56:06,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:06,267 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2021-12-14 16:56:06,267 INFO L186 Difference]: Start difference. First operand has 144 places, 123 transitions, 875 flow. Second operand 14 states and 793 transitions. [2021-12-14 16:56:06,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 155 transitions, 1262 flow [2021-12-14 16:56:06,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 155 transitions, 1178 flow, removed 6 selfloop flow, removed 11 redundant places. [2021-12-14 16:56:06,275 INFO L242 Difference]: Finished difference. Result has 145 places, 124 transitions, 893 flow [2021-12-14 16:56:06,275 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=145, PETRI_TRANSITIONS=124} [2021-12-14 16:56:06,275 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2021-12-14 16:56:06,276 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 893 flow [2021-12-14 16:56:06,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2021-12-14 16:56:06,276 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:06,276 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] [2021-12-14 16:56:06,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:56:06,277 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:06,277 INFO L85 PathProgramCache]: Analyzing trace with hash 567668941, now seen corresponding path program 1 times [2021-12-14 16:56:06,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:06,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899197708] [2021-12-14 16:56:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:06,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:06,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:06,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899197708] [2021-12-14 16:56:06,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899197708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:06,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277177867] [2021-12-14 16:56:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:06,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:06,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:06,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:06,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:56:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:06,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 16:56:06,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:06,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:06,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277177867] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:06,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:56:06,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2021-12-14 16:56:06,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193601067] [2021-12-14 16:56:06,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:06,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:56:06,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:06,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:56:06,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:56:06,625 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-14 16:56:06,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 124 transitions, 893 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:06,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:06,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-14 16:56:06,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:06,706 INFO L129 PetriNetUnfolder]: 187/534 cut-off events. [2021-12-14 16:56:06,707 INFO L130 PetriNetUnfolder]: For 2719/2719 co-relation queries the response was YES. [2021-12-14 16:56:06,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2086 conditions, 534 events. 187/534 cut-off events. For 2719/2719 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2798 event pairs, 18 based on Foata normal form. 7/535 useless extension candidates. Maximal degree in co-relation 2049. Up to 157 conditions per place. [2021-12-14 16:56:06,712 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 90 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2021-12-14 16:56:06,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 174 transitions, 1654 flow [2021-12-14 16:56:06,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:56:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:56:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 481 transitions. [2021-12-14 16:56:06,714 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7898193760262726 [2021-12-14 16:56:06,714 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 481 transitions. [2021-12-14 16:56:06,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 481 transitions. [2021-12-14 16:56:06,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:06,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 481 transitions. [2021-12-14 16:56:06,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.71428571428571) internal successors, (481), 7 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) [2021-12-14 16:56:06,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2021-12-14 16:56:06,716 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2021-12-14 16:56:06,716 INFO L186 Difference]: Start difference. First operand has 145 places, 124 transitions, 893 flow. Second operand 7 states and 481 transitions. [2021-12-14 16:56:06,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 174 transitions, 1654 flow [2021-12-14 16:56:06,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 174 transitions, 1531 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-12-14 16:56:06,725 INFO L242 Difference]: Finished difference. Result has 137 places, 139 transitions, 1057 flow [2021-12-14 16:56:06,725 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1057, PETRI_PLACES=137, PETRI_TRANSITIONS=139} [2021-12-14 16:56:06,726 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2021-12-14 16:56:06,726 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 139 transitions, 1057 flow [2021-12-14 16:56:06,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:06,726 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:06,726 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] [2021-12-14 16:56:06,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:56:06,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-14 16:56:06,942 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:06,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:06,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1340551103, now seen corresponding path program 2 times [2021-12-14 16:56:06,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:06,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953846586] [2021-12-14 16:56:06,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:06,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:06,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:06,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953846586] [2021-12-14 16:56:06,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953846586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:06,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:06,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:56:06,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400047693] [2021-12-14 16:56:06,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:06,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:56:06,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:06,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:56:06,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:56:06,968 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-14 16:56:06,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 1057 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:06,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:06,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-14 16:56:06,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:07,073 INFO L129 PetriNetUnfolder]: 201/624 cut-off events. [2021-12-14 16:56:07,073 INFO L130 PetriNetUnfolder]: For 3046/3051 co-relation queries the response was YES. [2021-12-14 16:56:07,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2408 conditions, 624 events. 201/624 cut-off events. For 3046/3051 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3488 event pairs, 44 based on Foata normal form. 5/623 useless extension candidates. Maximal degree in co-relation 2373. Up to 132 conditions per place. [2021-12-14 16:56:07,079 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 101 selfloop transitions, 35 changer transitions 5/190 dead transitions. [2021-12-14 16:56:07,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 190 transitions, 1803 flow [2021-12-14 16:56:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:56:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:56:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2021-12-14 16:56:07,080 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2021-12-14 16:56:07,080 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2021-12-14 16:56:07,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2021-12-14 16:56:07,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:07,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2021-12-14 16:56:07,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 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) [2021-12-14 16:56:07,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2021-12-14 16:56:07,082 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2021-12-14 16:56:07,082 INFO L186 Difference]: Start difference. First operand has 137 places, 139 transitions, 1057 flow. Second operand 7 states and 486 transitions. [2021-12-14 16:56:07,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 190 transitions, 1803 flow [2021-12-14 16:56:07,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 190 transitions, 1721 flow, removed 41 selfloop flow, removed 0 redundant places. [2021-12-14 16:56:07,093 INFO L242 Difference]: Finished difference. Result has 146 places, 147 transitions, 1246 flow [2021-12-14 16:56:07,093 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1246, PETRI_PLACES=146, PETRI_TRANSITIONS=147} [2021-12-14 16:56:07,094 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2021-12-14 16:56:07,094 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 147 transitions, 1246 flow [2021-12-14 16:56:07,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:07,094 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:07,094 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] [2021-12-14 16:56:07,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 16:56:07,095 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash -404474333, now seen corresponding path program 1 times [2021-12-14 16:56:07,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:07,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753702537] [2021-12-14 16:56:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:07,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:07,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:07,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753702537] [2021-12-14 16:56:07,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753702537] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:07,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926831112] [2021-12-14 16:56:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:07,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:07,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:07,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:07,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:56:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:07,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 16:56:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:07,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:07,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926831112] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:07,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:56:07,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2021-12-14 16:56:07,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39983012] [2021-12-14 16:56:07,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:07,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:56:07,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:07,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:56:07,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:56:07,323 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-14 16:56:07,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 147 transitions, 1246 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:07,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:07,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-14 16:56:07,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:07,422 INFO L129 PetriNetUnfolder]: 204/587 cut-off events. [2021-12-14 16:56:07,422 INFO L130 PetriNetUnfolder]: For 3699/3703 co-relation queries the response was YES. [2021-12-14 16:56:07,424 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2427 conditions, 587 events. 204/587 cut-off events. For 3699/3703 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3069 event pairs, 25 based on Foata normal form. 10/590 useless extension candidates. Maximal degree in co-relation 2388. Up to 171 conditions per place. [2021-12-14 16:56:07,427 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 108 selfloop transitions, 41 changer transitions 0/198 dead transitions. [2021-12-14 16:56:07,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 198 transitions, 2032 flow [2021-12-14 16:56:07,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:56:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:56:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2021-12-14 16:56:07,428 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2021-12-14 16:56:07,428 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2021-12-14 16:56:07,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2021-12-14 16:56:07,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:07,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2021-12-14 16:56:07,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 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) [2021-12-14 16:56:07,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2021-12-14 16:56:07,431 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2021-12-14 16:56:07,431 INFO L186 Difference]: Start difference. First operand has 146 places, 147 transitions, 1246 flow. Second operand 7 states and 483 transitions. [2021-12-14 16:56:07,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 198 transitions, 2032 flow [2021-12-14 16:56:07,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 198 transitions, 1924 flow, removed 37 selfloop flow, removed 8 redundant places. [2021-12-14 16:56:07,447 INFO L242 Difference]: Finished difference. Result has 144 places, 161 transitions, 1428 flow [2021-12-14 16:56:07,448 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1428, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2021-12-14 16:56:07,448 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-14 16:56:07,448 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1428 flow [2021-12-14 16:56:07,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:07,449 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:07,449 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] [2021-12-14 16:56:07,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:56:07,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-14 16:56:07,660 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:07,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1480469883, now seen corresponding path program 3 times [2021-12-14 16:56:07,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:07,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687567224] [2021-12-14 16:56:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:07,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:07,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:07,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687567224] [2021-12-14 16:56:07,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687567224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:07,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:07,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:56:07,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095638137] [2021-12-14 16:56:07,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:07,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:56:07,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:07,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:56:07,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:56:07,684 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-14 16:56:07,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 161 transitions, 1428 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:07,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:07,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-14 16:56:07,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:07,811 INFO L129 PetriNetUnfolder]: 225/681 cut-off events. [2021-12-14 16:56:07,811 INFO L130 PetriNetUnfolder]: For 4373/4377 co-relation queries the response was YES. [2021-12-14 16:56:07,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2858 conditions, 681 events. 225/681 cut-off events. For 4373/4377 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3919 event pairs, 52 based on Foata normal form. 7/679 useless extension candidates. Maximal degree in co-relation 2823. Up to 167 conditions per place. [2021-12-14 16:56:07,816 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 119 selfloop transitions, 62 changer transitions 0/230 dead transitions. [2021-12-14 16:56:07,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 230 transitions, 2429 flow [2021-12-14 16:56:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:56:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:56:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 566 transitions. [2021-12-14 16:56:07,818 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8132183908045977 [2021-12-14 16:56:07,818 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 566 transitions. [2021-12-14 16:56:07,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 566 transitions. [2021-12-14 16:56:07,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:07,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 566 transitions. [2021-12-14 16:56:07,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 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) [2021-12-14 16:56:07,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2021-12-14 16:56:07,820 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2021-12-14 16:56:07,820 INFO L186 Difference]: Start difference. First operand has 144 places, 161 transitions, 1428 flow. Second operand 8 states and 566 transitions. [2021-12-14 16:56:07,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 230 transitions, 2429 flow [2021-12-14 16:56:07,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 230 transitions, 2393 flow, removed 13 selfloop flow, removed 1 redundant places. [2021-12-14 16:56:07,835 INFO L242 Difference]: Finished difference. Result has 155 places, 180 transitions, 1877 flow [2021-12-14 16:56:07,835 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1877, PETRI_PLACES=155, PETRI_TRANSITIONS=180} [2021-12-14 16:56:07,835 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 78 predicate places. [2021-12-14 16:56:07,836 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 180 transitions, 1877 flow [2021-12-14 16:56:07,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:07,836 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:07,836 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] [2021-12-14 16:56:07,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-14 16:56:07,836 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:07,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:07,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1581789521, now seen corresponding path program 2 times [2021-12-14 16:56:07,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:07,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551981663] [2021-12-14 16:56:07,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:07,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:07,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:07,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551981663] [2021-12-14 16:56:07,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551981663] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:07,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365340351] [2021-12-14 16:56:07,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:56:07,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:07,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:07,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:07,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:56:07,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:56:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:56:07,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 16:56:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:07,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:08,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365340351] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:08,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:56:08,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2021-12-14 16:56:08,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479867518] [2021-12-14 16:56:08,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:08,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:56:08,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:08,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:56:08,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:56:08,110 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-14 16:56:08,110 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 180 transitions, 1877 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:08,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:08,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-14 16:56:08,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:08,265 INFO L129 PetriNetUnfolder]: 252/859 cut-off events. [2021-12-14 16:56:08,265 INFO L130 PetriNetUnfolder]: For 5888/5898 co-relation queries the response was YES. [2021-12-14 16:56:08,268 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 859 events. 252/859 cut-off events. For 5888/5898 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5514 event pairs, 48 based on Foata normal form. 10/859 useless extension candidates. Maximal degree in co-relation 3506. Up to 163 conditions per place. [2021-12-14 16:56:08,271 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 117 selfloop transitions, 81 changer transitions 0/247 dead transitions. [2021-12-14 16:56:08,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 247 transitions, 2905 flow [2021-12-14 16:56:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:56:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:56:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 431 transitions. [2021-12-14 16:56:08,288 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8256704980842912 [2021-12-14 16:56:08,288 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 431 transitions. [2021-12-14 16:56:08,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 431 transitions. [2021-12-14 16:56:08,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:08,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 431 transitions. [2021-12-14 16:56:08,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.83333333333333) internal successors, (431), 6 states have internal predecessors, (431), 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) [2021-12-14 16:56:08,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2021-12-14 16:56:08,289 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2021-12-14 16:56:08,289 INFO L186 Difference]: Start difference. First operand has 155 places, 180 transitions, 1877 flow. Second operand 6 states and 431 transitions. [2021-12-14 16:56:08,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 247 transitions, 2905 flow [2021-12-14 16:56:08,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 247 transitions, 2761 flow, removed 47 selfloop flow, removed 2 redundant places. [2021-12-14 16:56:08,307 INFO L242 Difference]: Finished difference. Result has 163 places, 202 transitions, 2363 flow [2021-12-14 16:56:08,308 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2363, PETRI_PLACES=163, PETRI_TRANSITIONS=202} [2021-12-14 16:56:08,308 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 86 predicate places. [2021-12-14 16:56:08,308 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 202 transitions, 2363 flow [2021-12-14 16:56:08,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:08,308 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:08,309 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] [2021-12-14 16:56:08,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:56:08,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:08,526 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:08,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:08,526 INFO L85 PathProgramCache]: Analyzing trace with hash -157933399, now seen corresponding path program 3 times [2021-12-14 16:56:08,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:08,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062617108] [2021-12-14 16:56:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:08,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:08,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:08,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062617108] [2021-12-14 16:56:08,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062617108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:08,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:08,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:56:08,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699841777] [2021-12-14 16:56:08,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:08,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:56:08,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:08,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:56:08,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:56:08,555 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-14 16:56:08,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 202 transitions, 2363 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:08,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:08,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-14 16:56:08,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:08,701 INFO L129 PetriNetUnfolder]: 254/861 cut-off events. [2021-12-14 16:56:08,701 INFO L130 PetriNetUnfolder]: For 7093/7118 co-relation queries the response was YES. [2021-12-14 16:56:08,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 861 events. 254/861 cut-off events. For 7093/7118 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5564 event pairs, 63 based on Foata normal form. 9/855 useless extension candidates. Maximal degree in co-relation 3735. Up to 164 conditions per place. [2021-12-14 16:56:08,715 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 128 selfloop transitions, 60 changer transitions 5/242 dead transitions. [2021-12-14 16:56:08,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 242 transitions, 3086 flow [2021-12-14 16:56:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:56:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:56:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 558 transitions. [2021-12-14 16:56:08,716 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8017241379310345 [2021-12-14 16:56:08,716 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 558 transitions. [2021-12-14 16:56:08,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 558 transitions. [2021-12-14 16:56:08,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:08,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 558 transitions. [2021-12-14 16:56:08,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.75) internal successors, (558), 8 states have internal predecessors, (558), 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) [2021-12-14 16:56:08,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2021-12-14 16:56:08,718 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2021-12-14 16:56:08,718 INFO L186 Difference]: Start difference. First operand has 163 places, 202 transitions, 2363 flow. Second operand 8 states and 558 transitions. [2021-12-14 16:56:08,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 242 transitions, 3086 flow [2021-12-14 16:56:08,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 242 transitions, 3017 flow, removed 19 selfloop flow, removed 4 redundant places. [2021-12-14 16:56:08,750 INFO L242 Difference]: Finished difference. Result has 170 places, 207 transitions, 2548 flow [2021-12-14 16:56:08,750 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2548, PETRI_PLACES=170, PETRI_TRANSITIONS=207} [2021-12-14 16:56:08,751 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 93 predicate places. [2021-12-14 16:56:08,751 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 207 transitions, 2548 flow [2021-12-14 16:56:08,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:08,751 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:08,752 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] [2021-12-14 16:56:08,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-14 16:56:08,752 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash -33237265, now seen corresponding path program 4 times [2021-12-14 16:56:08,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:08,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625718641] [2021-12-14 16:56:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:08,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:08,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:08,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625718641] [2021-12-14 16:56:08,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625718641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:08,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:08,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:56:08,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278747274] [2021-12-14 16:56:08,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:08,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:56:08,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:08,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:56:08,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:56:08,778 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-14 16:56:08,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 207 transitions, 2548 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:08,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:08,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-14 16:56:08,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:08,937 INFO L129 PetriNetUnfolder]: 239/781 cut-off events. [2021-12-14 16:56:08,937 INFO L130 PetriNetUnfolder]: For 7389/7414 co-relation queries the response was YES. [2021-12-14 16:56:08,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3597 conditions, 781 events. 239/781 cut-off events. For 7389/7414 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4811 event pairs, 46 based on Foata normal form. 5/776 useless extension candidates. Maximal degree in co-relation 3553. Up to 182 conditions per place. [2021-12-14 16:56:08,948 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 137 selfloop transitions, 54 changer transitions 5/245 dead transitions. [2021-12-14 16:56:08,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 245 transitions, 3229 flow [2021-12-14 16:56:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:56:08,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:56:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 554 transitions. [2021-12-14 16:56:08,950 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2021-12-14 16:56:08,950 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 554 transitions. [2021-12-14 16:56:08,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 554 transitions. [2021-12-14 16:56:08,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:08,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 554 transitions. [2021-12-14 16:56:08,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 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) [2021-12-14 16:56:08,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2021-12-14 16:56:08,952 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2021-12-14 16:56:08,952 INFO L186 Difference]: Start difference. First operand has 170 places, 207 transitions, 2548 flow. Second operand 8 states and 554 transitions. [2021-12-14 16:56:08,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 245 transitions, 3229 flow [2021-12-14 16:56:08,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 245 transitions, 3142 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-12-14 16:56:08,976 INFO L242 Difference]: Finished difference. Result has 174 places, 212 transitions, 2715 flow [2021-12-14 16:56:08,976 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2715, PETRI_PLACES=174, PETRI_TRANSITIONS=212} [2021-12-14 16:56:08,979 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 97 predicate places. [2021-12-14 16:56:08,980 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 212 transitions, 2715 flow [2021-12-14 16:56:08,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:08,980 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:08,980 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] [2021-12-14 16:56:08,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-14 16:56:08,980 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash -874020257, now seen corresponding path program 5 times [2021-12-14 16:56:08,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:08,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537838160] [2021-12-14 16:56:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:08,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:09,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:09,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537838160] [2021-12-14 16:56:09,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537838160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:09,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:09,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:56:09,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526870940] [2021-12-14 16:56:09,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:09,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:56:09,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:56:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:56:09,011 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-14 16:56:09,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 212 transitions, 2715 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:09,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:09,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-14 16:56:09,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:09,199 INFO L129 PetriNetUnfolder]: 246/771 cut-off events. [2021-12-14 16:56:09,199 INFO L130 PetriNetUnfolder]: For 8604/8623 co-relation queries the response was YES. [2021-12-14 16:56:09,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3743 conditions, 771 events. 246/771 cut-off events. For 8604/8623 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4635 event pairs, 46 based on Foata normal form. 9/772 useless extension candidates. Maximal degree in co-relation 3698. Up to 190 conditions per place. [2021-12-14 16:56:09,207 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 118 selfloop transitions, 92 changer transitions 2/261 dead transitions. [2021-12-14 16:56:09,207 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 261 transitions, 3643 flow [2021-12-14 16:56:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:56:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:56:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2021-12-14 16:56:09,208 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2021-12-14 16:56:09,209 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2021-12-14 16:56:09,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2021-12-14 16:56:09,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:09,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2021-12-14 16:56:09,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.0) internal successors, (568), 8 states have internal predecessors, (568), 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) [2021-12-14 16:56:09,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2021-12-14 16:56:09,211 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2021-12-14 16:56:09,211 INFO L186 Difference]: Start difference. First operand has 174 places, 212 transitions, 2715 flow. Second operand 8 states and 568 transitions. [2021-12-14 16:56:09,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 261 transitions, 3643 flow [2021-12-14 16:56:09,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 261 transitions, 3544 flow, removed 4 selfloop flow, removed 9 redundant places. [2021-12-14 16:56:09,234 INFO L242 Difference]: Finished difference. Result has 174 places, 222 transitions, 3136 flow [2021-12-14 16:56:09,235 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3136, PETRI_PLACES=174, PETRI_TRANSITIONS=222} [2021-12-14 16:56:09,237 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 97 predicate places. [2021-12-14 16:56:09,238 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 222 transitions, 3136 flow [2021-12-14 16:56:09,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:09,238 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:09,238 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] [2021-12-14 16:56:09,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-14 16:56:09,239 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:09,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:09,239 INFO L85 PathProgramCache]: Analyzing trace with hash -562261393, now seen corresponding path program 4 times [2021-12-14 16:56:09,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:09,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627117958] [2021-12-14 16:56:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:09,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:09,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:09,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627117958] [2021-12-14 16:56:09,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627117958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:09,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791915556] [2021-12-14 16:56:09,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 16:56:09,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:09,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:09,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:09,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:56:09,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 16:56:09,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:56:09,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 16:56:09,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:09,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:09,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791915556] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:09,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:56:09,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2021-12-14 16:56:09,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138284006] [2021-12-14 16:56:09,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:09,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:56:09,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:56:09,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:56:09,530 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-14 16:56:09,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 222 transitions, 3136 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:09,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:09,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-14 16:56:09,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:09,657 INFO L129 PetriNetUnfolder]: 230/710 cut-off events. [2021-12-14 16:56:09,657 INFO L130 PetriNetUnfolder]: For 9659/9659 co-relation queries the response was YES. [2021-12-14 16:56:09,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3676 conditions, 710 events. 230/710 cut-off events. For 9659/9659 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4061 event pairs, 45 based on Foata normal form. 8/713 useless extension candidates. Maximal degree in co-relation 3633. Up to 229 conditions per place. [2021-12-14 16:56:09,664 INFO L132 encePairwiseOnDemand]: 78/87 looper letters, 131 selfloop transitions, 67 changer transitions 0/247 dead transitions. [2021-12-14 16:56:09,664 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 247 transitions, 3702 flow [2021-12-14 16:56:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:56:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:56:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2021-12-14 16:56:09,665 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2021-12-14 16:56:09,665 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2021-12-14 16:56:09,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2021-12-14 16:56:09,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:09,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2021-12-14 16:56:09,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 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) [2021-12-14 16:56:09,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2021-12-14 16:56:09,667 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2021-12-14 16:56:09,667 INFO L186 Difference]: Start difference. First operand has 174 places, 222 transitions, 3136 flow. Second operand 6 states and 426 transitions. [2021-12-14 16:56:09,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 247 transitions, 3702 flow [2021-12-14 16:56:09,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 247 transitions, 3679 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-14 16:56:09,693 INFO L242 Difference]: Finished difference. Result has 180 places, 221 transitions, 3284 flow [2021-12-14 16:56:09,694 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3284, PETRI_PLACES=180, PETRI_TRANSITIONS=221} [2021-12-14 16:56:09,694 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 103 predicate places. [2021-12-14 16:56:09,695 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 221 transitions, 3284 flow [2021-12-14 16:56:09,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:09,695 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:09,695 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] [2021-12-14 16:56:09,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:56:09,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:09,903 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:09,904 INFO L85 PathProgramCache]: Analyzing trace with hash -736852561, now seen corresponding path program 5 times [2021-12-14 16:56:09,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:09,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302031433] [2021-12-14 16:56:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:09,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:09,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:09,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302031433] [2021-12-14 16:56:09,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302031433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:09,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:09,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:56:09,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419689340] [2021-12-14 16:56:09,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:09,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:56:09,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:09,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:56:09,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:56:09,928 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-14 16:56:09,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 221 transitions, 3284 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:09,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:09,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-14 16:56:09,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:10,070 INFO L129 PetriNetUnfolder]: 225/704 cut-off events. [2021-12-14 16:56:10,070 INFO L130 PetriNetUnfolder]: For 10574/10576 co-relation queries the response was YES. [2021-12-14 16:56:10,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3784 conditions, 704 events. 225/704 cut-off events. For 10574/10576 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3998 event pairs, 60 based on Foata normal form. 3/698 useless extension candidates. Maximal degree in co-relation 3739. Up to 195 conditions per place. [2021-12-14 16:56:10,077 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 151 selfloop transitions, 33 changer transitions 5/238 dead transitions. [2021-12-14 16:56:10,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 238 transitions, 3723 flow [2021-12-14 16:56:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:56:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:56:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2021-12-14 16:56:10,078 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2021-12-14 16:56:10,078 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2021-12-14 16:56:10,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2021-12-14 16:56:10,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:10,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2021-12-14 16:56:10,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 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) [2021-12-14 16:56:10,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2021-12-14 16:56:10,080 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2021-12-14 16:56:10,080 INFO L186 Difference]: Start difference. First operand has 180 places, 221 transitions, 3284 flow. Second operand 7 states and 483 transitions. [2021-12-14 16:56:10,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 238 transitions, 3723 flow [2021-12-14 16:56:10,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 238 transitions, 3705 flow, removed 9 selfloop flow, removed 0 redundant places. [2021-12-14 16:56:10,107 INFO L242 Difference]: Finished difference. Result has 187 places, 216 transitions, 3188 flow [2021-12-14 16:56:10,108 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3189, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3188, PETRI_PLACES=187, PETRI_TRANSITIONS=216} [2021-12-14 16:56:10,108 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 110 predicate places. [2021-12-14 16:56:10,108 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 216 transitions, 3188 flow [2021-12-14 16:56:10,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:10,109 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:10,109 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] [2021-12-14 16:56:10,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-14 16:56:10,110 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:10,110 INFO L85 PathProgramCache]: Analyzing trace with hash -540499465, now seen corresponding path program 6 times [2021-12-14 16:56:10,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:10,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154759184] [2021-12-14 16:56:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:10,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:10,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:10,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154759184] [2021-12-14 16:56:10,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154759184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:10,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:10,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:56:10,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607074015] [2021-12-14 16:56:10,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:10,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:56:10,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:10,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:56:10,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:56:10,138 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-14 16:56:10,139 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 216 transitions, 3188 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:10,139 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:10,139 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-14 16:56:10,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:10,270 INFO L129 PetriNetUnfolder]: 213/645 cut-off events. [2021-12-14 16:56:10,270 INFO L130 PetriNetUnfolder]: For 10200/10202 co-relation queries the response was YES. [2021-12-14 16:56:10,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 645 events. 213/645 cut-off events. For 10200/10202 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3514 event pairs, 52 based on Foata normal form. 2/638 useless extension candidates. Maximal degree in co-relation 3500. Up to 195 conditions per place. [2021-12-14 16:56:10,276 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 124 selfloop transitions, 49 changer transitions 2/224 dead transitions. [2021-12-14 16:56:10,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 224 transitions, 3456 flow [2021-12-14 16:56:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:56:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:56:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2021-12-14 16:56:10,278 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7902298850574713 [2021-12-14 16:56:10,278 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2021-12-14 16:56:10,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2021-12-14 16:56:10,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:10,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2021-12-14 16:56:10,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 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) [2021-12-14 16:56:10,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2021-12-14 16:56:10,280 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2021-12-14 16:56:10,281 INFO L186 Difference]: Start difference. First operand has 187 places, 216 transitions, 3188 flow. Second operand 8 states and 550 transitions. [2021-12-14 16:56:10,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 224 transitions, 3456 flow [2021-12-14 16:56:10,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 224 transitions, 3370 flow, removed 9 selfloop flow, removed 4 redundant places. [2021-12-14 16:56:10,304 INFO L242 Difference]: Finished difference. Result has 186 places, 202 transitions, 2978 flow [2021-12-14 16:56:10,305 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2978, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2021-12-14 16:56:10,305 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 109 predicate places. [2021-12-14 16:56:10,306 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 2978 flow [2021-12-14 16:56:10,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:10,306 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:10,306 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] [2021-12-14 16:56:10,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-14 16:56:10,306 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:10,307 INFO L85 PathProgramCache]: Analyzing trace with hash 567381603, now seen corresponding path program 6 times [2021-12-14 16:56:10,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:10,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272811056] [2021-12-14 16:56:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:10,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:10,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:10,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272811056] [2021-12-14 16:56:10,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272811056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:10,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:10,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:56:10,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416129501] [2021-12-14 16:56:10,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:10,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:56:10,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:10,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:56:10,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:56:10,329 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-14 16:56:10,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 2978 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:10,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:10,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-14 16:56:10,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:10,436 INFO L129 PetriNetUnfolder]: 196/571 cut-off events. [2021-12-14 16:56:10,436 INFO L130 PetriNetUnfolder]: For 9516/9518 co-relation queries the response was YES. [2021-12-14 16:56:10,439 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3272 conditions, 571 events. 196/571 cut-off events. For 9516/9518 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2893 event pairs, 39 based on Foata normal form. 3/568 useless extension candidates. Maximal degree in co-relation 3226. Up to 190 conditions per place. [2021-12-14 16:56:10,441 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 109 selfloop transitions, 45 changer transitions 3/206 dead transitions. [2021-12-14 16:56:10,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 206 transitions, 3168 flow [2021-12-14 16:56:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:56:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:56:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2021-12-14 16:56:10,442 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7881773399014779 [2021-12-14 16:56:10,442 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2021-12-14 16:56:10,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2021-12-14 16:56:10,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:10,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2021-12-14 16:56:10,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 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) [2021-12-14 16:56:10,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2021-12-14 16:56:10,444 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2021-12-14 16:56:10,444 INFO L186 Difference]: Start difference. First operand has 186 places, 202 transitions, 2978 flow. Second operand 7 states and 480 transitions. [2021-12-14 16:56:10,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 206 transitions, 3168 flow [2021-12-14 16:56:10,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 206 transitions, 3058 flow, removed 9 selfloop flow, removed 10 redundant places. [2021-12-14 16:56:10,464 INFO L242 Difference]: Finished difference. Result has 176 places, 188 transitions, 2729 flow [2021-12-14 16:56:10,464 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2729, PETRI_PLACES=176, PETRI_TRANSITIONS=188} [2021-12-14 16:56:10,464 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 99 predicate places. [2021-12-14 16:56:10,465 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 188 transitions, 2729 flow [2021-12-14 16:56:10,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2021-12-14 16:56:10,465 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:10,465 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] [2021-12-14 16:56:10,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-14 16:56:10,465 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:10,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:10,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1990008755, now seen corresponding path program 1 times [2021-12-14 16:56:10,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:10,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599297603] [2021-12-14 16:56:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:10,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:10,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:10,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599297603] [2021-12-14 16:56:10,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599297603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:10,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023650597] [2021-12-14 16:56:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:10,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:10,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:10,602 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:10,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 16:56:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:10,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:56:10,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:11,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:11,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023650597] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:56:11,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:56:11,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-14 16:56:11,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085526751] [2021-12-14 16:56:11,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:56:11,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 16:56:11,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:11,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 16:56:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 16:56:11,610 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-14 16:56:11,611 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 188 transitions, 2729 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 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) [2021-12-14 16:56:11,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:11,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-14 16:56:11,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:20,912 INFO L129 PetriNetUnfolder]: 972/2298 cut-off events. [2021-12-14 16:56:20,912 INFO L130 PetriNetUnfolder]: For 36390/36390 co-relation queries the response was YES. [2021-12-14 16:56:20,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13560 conditions, 2298 events. 972/2298 cut-off events. For 36390/36390 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15694 event pairs, 34 based on Foata normal form. 3/2289 useless extension candidates. Maximal degree in co-relation 13516. Up to 363 conditions per place. [2021-12-14 16:56:20,934 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 247 selfloop transitions, 856 changer transitions 17/1159 dead transitions. [2021-12-14 16:56:20,934 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1159 transitions, 17967 flow [2021-12-14 16:56:20,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2021-12-14 16:56:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-12-14 16:56:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 11784 transitions. [2021-12-14 16:56:20,944 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.604679802955665 [2021-12-14 16:56:20,944 INFO L72 ComplementDD]: Start complementDD. Operand 224 states and 11784 transitions. [2021-12-14 16:56:20,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 224 states and 11784 transitions. [2021-12-14 16:56:20,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:20,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 224 states and 11784 transitions. [2021-12-14 16:56:20,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 225 states, 224 states have (on average 52.607142857142854) internal successors, (11784), 224 states have internal predecessors, (11784), 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) [2021-12-14 16:56:20,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 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) [2021-12-14 16:56:20,987 INFO L81 ComplementDD]: Finished complementDD. Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 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) [2021-12-14 16:56:20,988 INFO L186 Difference]: Start difference. First operand has 176 places, 188 transitions, 2729 flow. Second operand 224 states and 11784 transitions. [2021-12-14 16:56:20,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1159 transitions, 17967 flow [2021-12-14 16:56:21,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1159 transitions, 17323 flow, removed 0 selfloop flow, removed 9 redundant places. [2021-12-14 16:56:21,058 INFO L242 Difference]: Finished difference. Result has 446 places, 990 transitions, 16263 flow [2021-12-14 16:56:21,058 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=224, PETRI_FLOW=16263, PETRI_PLACES=446, PETRI_TRANSITIONS=990} [2021-12-14 16:56:21,059 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 369 predicate places. [2021-12-14 16:56:21,059 INFO L470 AbstractCegarLoop]: Abstraction has has 446 places, 990 transitions, 16263 flow [2021-12-14 16:56:21,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 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) [2021-12-14 16:56:21,059 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:21,060 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] [2021-12-14 16:56:21,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 16:56:21,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-14 16:56:21,266 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:21,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2039132535, now seen corresponding path program 2 times [2021-12-14 16:56:21,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:21,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466650706] [2021-12-14 16:56:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:21,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:21,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:21,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466650706] [2021-12-14 16:56:21,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466650706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:21,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871056570] [2021-12-14 16:56:21,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:56:21,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:21,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:21,410 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:21,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 16:56:21,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:56:21,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:56:21,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:56:21,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:21,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:22,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871056570] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:56:22,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:56:22,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-14 16:56:22,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558111249] [2021-12-14 16:56:22,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:56:22,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 16:56:22,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:22,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 16:56:22,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 16:56:22,359 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-14 16:56:22,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 990 transitions, 16263 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 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) [2021-12-14 16:56:22,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:22,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-14 16:56:22,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:25,153 INFO L129 PetriNetUnfolder]: 1106/2968 cut-off events. [2021-12-14 16:56:25,153 INFO L130 PetriNetUnfolder]: For 137972/137972 co-relation queries the response was YES. [2021-12-14 16:56:25,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24643 conditions, 2968 events. 1106/2968 cut-off events. For 137972/137972 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 23864 event pairs, 50 based on Foata normal form. 1/2955 useless extension candidates. Maximal degree in co-relation 24537. Up to 439 conditions per place. [2021-12-14 16:56:25,201 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 360 selfloop transitions, 763 changer transitions 45/1207 dead transitions. [2021-12-14 16:56:25,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1207 transitions, 23367 flow [2021-12-14 16:56:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-14 16:56:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-14 16:56:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3489 transitions. [2021-12-14 16:56:25,204 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6266163793103449 [2021-12-14 16:56:25,204 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3489 transitions. [2021-12-14 16:56:25,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3489 transitions. [2021-12-14 16:56:25,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:25,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3489 transitions. [2021-12-14 16:56:25,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.515625) internal successors, (3489), 64 states have internal predecessors, (3489), 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) [2021-12-14 16:56:25,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 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) [2021-12-14 16:56:25,215 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 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) [2021-12-14 16:56:25,215 INFO L186 Difference]: Start difference. First operand has 446 places, 990 transitions, 16263 flow. Second operand 64 states and 3489 transitions. [2021-12-14 16:56:25,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1207 transitions, 23367 flow [2021-12-14 16:56:25,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1207 transitions, 21916 flow, removed 479 selfloop flow, removed 13 redundant places. [2021-12-14 16:56:25,671 INFO L242 Difference]: Finished difference. Result has 508 places, 1036 transitions, 17767 flow [2021-12-14 16:56:25,673 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15031, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=17767, PETRI_PLACES=508, PETRI_TRANSITIONS=1036} [2021-12-14 16:56:25,673 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 431 predicate places. [2021-12-14 16:56:25,673 INFO L470 AbstractCegarLoop]: Abstraction has has 508 places, 1036 transitions, 17767 flow [2021-12-14 16:56:25,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 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) [2021-12-14 16:56:25,674 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:25,674 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] [2021-12-14 16:56:25,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 16:56:25,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:25,887 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:25,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:25,888 INFO L85 PathProgramCache]: Analyzing trace with hash -234836121, now seen corresponding path program 3 times [2021-12-14 16:56:25,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:25,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525721853] [2021-12-14 16:56:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:25,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:26,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:26,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525721853] [2021-12-14 16:56:26,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525721853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:26,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920998615] [2021-12-14 16:56:26,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 16:56:26,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:26,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:26,023 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:26,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 16:56:26,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 16:56:26,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:56:26,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:56:26,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:26,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:26,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920998615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:56:26,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:56:26,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-14 16:56:26,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054621915] [2021-12-14 16:56:26,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:56:26,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 16:56:26,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:26,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 16:56:26,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 16:56:26,958 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-14 16:56:26,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 1036 transitions, 17767 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 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) [2021-12-14 16:56:26,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:26,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-14 16:56:26,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:29,702 INFO L129 PetriNetUnfolder]: 1087/2956 cut-off events. [2021-12-14 16:56:29,702 INFO L130 PetriNetUnfolder]: For 157907/157907 co-relation queries the response was YES. [2021-12-14 16:56:29,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25841 conditions, 2956 events. 1087/2956 cut-off events. For 157907/157907 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24023 event pairs, 61 based on Foata normal form. 2/2931 useless extension candidates. Maximal degree in co-relation 25724. Up to 415 conditions per place. [2021-12-14 16:56:29,776 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 339 selfloop transitions, 775 changer transitions 31/1184 dead transitions. [2021-12-14 16:56:29,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1184 transitions, 23647 flow [2021-12-14 16:56:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-14 16:56:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-12-14 16:56:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3577 transitions. [2021-12-14 16:56:29,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6229536746778126 [2021-12-14 16:56:29,779 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3577 transitions. [2021-12-14 16:56:29,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3577 transitions. [2021-12-14 16:56:29,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:29,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3577 transitions. [2021-12-14 16:56:29,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 54.196969696969695) internal successors, (3577), 66 states have internal predecessors, (3577), 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) [2021-12-14 16:56:29,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 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) [2021-12-14 16:56:29,789 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 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) [2021-12-14 16:56:29,789 INFO L186 Difference]: Start difference. First operand has 508 places, 1036 transitions, 17767 flow. Second operand 66 states and 3577 transitions. [2021-12-14 16:56:29,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1184 transitions, 23647 flow [2021-12-14 16:56:30,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1184 transitions, 21875 flow, removed 167 selfloop flow, removed 43 redundant places. [2021-12-14 16:56:30,254 INFO L242 Difference]: Finished difference. Result has 538 places, 1053 transitions, 18288 flow [2021-12-14 16:56:30,255 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16108, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1036, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=18288, PETRI_PLACES=538, PETRI_TRANSITIONS=1053} [2021-12-14 16:56:30,255 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 461 predicate places. [2021-12-14 16:56:30,256 INFO L470 AbstractCegarLoop]: Abstraction has has 538 places, 1053 transitions, 18288 flow [2021-12-14 16:56:30,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 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) [2021-12-14 16:56:30,256 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:30,256 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] [2021-12-14 16:56:30,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 16:56:30,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:30,473 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:30,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1084507737, now seen corresponding path program 4 times [2021-12-14 16:56:30,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:30,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297005392] [2021-12-14 16:56:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:30,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:30,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:30,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297005392] [2021-12-14 16:56:30,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297005392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:30,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520665285] [2021-12-14 16:56:30,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 16:56:30,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:30,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:30,618 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:30,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 16:56:30,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 16:56:30,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:56:30,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 16:56:30,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:31,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:31,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520665285] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:56:31,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:56:31,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-14 16:56:31,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85828892] [2021-12-14 16:56:31,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:56:31,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:56:31,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:31,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:56:31,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:56:31,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-14 16:56:31,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1053 transitions, 18288 flow. Second operand has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 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) [2021-12-14 16:56:31,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:31,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-14 16:56:31,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:33,284 INFO L129 PetriNetUnfolder]: 1083/3024 cut-off events. [2021-12-14 16:56:33,284 INFO L130 PetriNetUnfolder]: For 170749/170749 co-relation queries the response was YES. [2021-12-14 16:56:33,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26555 conditions, 3024 events. 1083/3024 cut-off events. For 170749/170749 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 25173 event pairs, 98 based on Foata normal form. 3/2998 useless extension candidates. Maximal degree in co-relation 26430. Up to 461 conditions per place. [2021-12-14 16:56:33,327 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 654 selfloop transitions, 462 changer transitions 19/1174 dead transitions. [2021-12-14 16:56:33,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1174 transitions, 23596 flow [2021-12-14 16:56:33,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-14 16:56:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-14 16:56:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2064 transitions. [2021-12-14 16:56:33,338 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.641192917054986 [2021-12-14 16:56:33,338 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2064 transitions. [2021-12-14 16:56:33,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2064 transitions. [2021-12-14 16:56:33,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:33,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2064 transitions. [2021-12-14 16:56:33,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.78378378378378) internal successors, (2064), 37 states have internal predecessors, (2064), 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) [2021-12-14 16:56:33,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 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) [2021-12-14 16:56:33,343 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 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) [2021-12-14 16:56:33,343 INFO L186 Difference]: Start difference. First operand has 538 places, 1053 transitions, 18288 flow. Second operand 37 states and 2064 transitions. [2021-12-14 16:56:33,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1174 transitions, 23596 flow [2021-12-14 16:56:33,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1174 transitions, 21855 flow, removed 134 selfloop flow, removed 52 redundant places. [2021-12-14 16:56:33,815 INFO L242 Difference]: Finished difference. Result has 519 places, 1068 transitions, 17937 flow [2021-12-14 16:56:33,816 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16677, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17937, PETRI_PLACES=519, PETRI_TRANSITIONS=1068} [2021-12-14 16:56:33,816 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 442 predicate places. [2021-12-14 16:56:33,817 INFO L470 AbstractCegarLoop]: Abstraction has has 519 places, 1068 transitions, 17937 flow [2021-12-14 16:56:33,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 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) [2021-12-14 16:56:33,817 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:33,817 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] [2021-12-14 16:56:33,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-14 16:56:34,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-14 16:56:34,029 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:34,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:34,030 INFO L85 PathProgramCache]: Analyzing trace with hash 313019791, now seen corresponding path program 5 times [2021-12-14 16:56:34,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:34,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355813784] [2021-12-14 16:56:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:34,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:34,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:34,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355813784] [2021-12-14 16:56:34,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355813784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:34,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464351012] [2021-12-14 16:56:34,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 16:56:34,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:34,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:34,159 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:34,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 16:56:34,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:56:34,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:56:34,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-14 16:56:34,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:34,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:34,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464351012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:56:34,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:56:34,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-14 16:56:34,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743964434] [2021-12-14 16:56:34,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:56:34,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:56:34,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:34,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:56:34,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:56:34,977 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-14 16:56:34,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1068 transitions, 17937 flow. Second operand has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 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) [2021-12-14 16:56:34,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:34,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-14 16:56:34,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:36,906 INFO L129 PetriNetUnfolder]: 1141/3141 cut-off events. [2021-12-14 16:56:36,906 INFO L130 PetriNetUnfolder]: For 168024/168024 co-relation queries the response was YES. [2021-12-14 16:56:36,932 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27306 conditions, 3141 events. 1141/3141 cut-off events. For 168024/168024 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 26429 event pairs, 72 based on Foata normal form. 2/3100 useless extension candidates. Maximal degree in co-relation 27183. Up to 620 conditions per place. [2021-12-14 16:56:36,948 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 316 selfloop transitions, 904 changer transitions 21/1280 dead transitions. [2021-12-14 16:56:36,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 1280 transitions, 24701 flow [2021-12-14 16:56:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-14 16:56:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-14 16:56:36,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2440 transitions. [2021-12-14 16:56:36,950 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6232439335887612 [2021-12-14 16:56:36,950 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2440 transitions. [2021-12-14 16:56:36,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2440 transitions. [2021-12-14 16:56:36,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:36,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2440 transitions. [2021-12-14 16:56:36,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 54.22222222222222) internal successors, (2440), 45 states have internal predecessors, (2440), 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) [2021-12-14 16:56:36,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 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) [2021-12-14 16:56:36,956 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 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) [2021-12-14 16:56:36,956 INFO L186 Difference]: Start difference. First operand has 519 places, 1068 transitions, 17937 flow. Second operand 45 states and 2440 transitions. [2021-12-14 16:56:36,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 1280 transitions, 24701 flow [2021-12-14 16:56:37,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1280 transitions, 23870 flow, removed 48 selfloop flow, removed 21 redundant places. [2021-12-14 16:56:37,503 INFO L242 Difference]: Finished difference. Result has 558 places, 1181 transitions, 21851 flow [2021-12-14 16:56:37,503 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=17162, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=785, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=21851, PETRI_PLACES=558, PETRI_TRANSITIONS=1181} [2021-12-14 16:56:37,504 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 481 predicate places. [2021-12-14 16:56:37,504 INFO L470 AbstractCegarLoop]: Abstraction has has 558 places, 1181 transitions, 21851 flow [2021-12-14 16:56:37,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 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) [2021-12-14 16:56:37,504 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:37,504 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] [2021-12-14 16:56:37,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 16:56:37,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-14 16:56:37,705 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash 58562409, now seen corresponding path program 6 times [2021-12-14 16:56:37,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:37,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675670541] [2021-12-14 16:56:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:37,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:37,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:37,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675670541] [2021-12-14 16:56:37,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675670541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:37,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259271537] [2021-12-14 16:56:37,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 16:56:37,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:37,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:37,841 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:37,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 16:56:37,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-14 16:56:37,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:56:37,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:56:37,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:38,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:38,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259271537] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:56:38,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:56:38,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-14 16:56:38,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673166554] [2021-12-14 16:56:38,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:56:38,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 16:56:38,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:38,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 16:56:38,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 16:56:38,766 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-14 16:56:38,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 1181 transitions, 21851 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 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) [2021-12-14 16:56:38,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:38,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-14 16:56:38,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:41,398 INFO L129 PetriNetUnfolder]: 1186/3312 cut-off events. [2021-12-14 16:56:41,398 INFO L130 PetriNetUnfolder]: For 192460/192460 co-relation queries the response was YES. [2021-12-14 16:56:41,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30627 conditions, 3312 events. 1186/3312 cut-off events. For 192460/192460 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 27905 event pairs, 69 based on Foata normal form. 1/3282 useless extension candidates. Maximal degree in co-relation 30489. Up to 445 conditions per place. [2021-12-14 16:56:41,459 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 447 selfloop transitions, 853 changer transitions 50/1389 dead transitions. [2021-12-14 16:56:41,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 1389 transitions, 30375 flow [2021-12-14 16:56:41,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-14 16:56:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-12-14 16:56:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3349 transitions. [2021-12-14 16:56:41,463 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6310533257961183 [2021-12-14 16:56:41,463 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3349 transitions. [2021-12-14 16:56:41,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3349 transitions. [2021-12-14 16:56:41,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:41,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3349 transitions. [2021-12-14 16:56:41,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.90163934426229) internal successors, (3349), 61 states have internal predecessors, (3349), 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) [2021-12-14 16:56:41,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 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) [2021-12-14 16:56:41,470 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 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) [2021-12-14 16:56:41,470 INFO L186 Difference]: Start difference. First operand has 558 places, 1181 transitions, 21851 flow. Second operand 61 states and 3349 transitions. [2021-12-14 16:56:41,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 1389 transitions, 30375 flow [2021-12-14 16:56:42,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1389 transitions, 29834 flow, removed 176 selfloop flow, removed 15 redundant places. [2021-12-14 16:56:42,220 INFO L242 Difference]: Finished difference. Result has 617 places, 1215 transitions, 24467 flow [2021-12-14 16:56:42,221 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=21528, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=783, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=24467, PETRI_PLACES=617, PETRI_TRANSITIONS=1215} [2021-12-14 16:56:42,222 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 540 predicate places. [2021-12-14 16:56:42,222 INFO L470 AbstractCegarLoop]: Abstraction has has 617 places, 1215 transitions, 24467 flow [2021-12-14 16:56:42,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 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) [2021-12-14 16:56:42,222 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:42,222 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] [2021-12-14 16:56:42,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 16:56:42,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-14 16:56:42,439 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:42,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:42,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1976082511, now seen corresponding path program 7 times [2021-12-14 16:56:42,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:42,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645036353] [2021-12-14 16:56:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:42,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:42,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645036353] [2021-12-14 16:56:42,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645036353] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896825227] [2021-12-14 16:56:42,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 16:56:42,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:42,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:42,582 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:42,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 16:56:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:42,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:56:42,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:42,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:43,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896825227] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:56:43,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:56:43,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-14 16:56:43,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713307220] [2021-12-14 16:56:43,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:56:43,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 16:56:43,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:43,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 16:56:43,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 16:56:43,401 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-14 16:56:43,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 1215 transitions, 24467 flow. Second operand has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 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) [2021-12-14 16:56:43,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:43,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-14 16:56:43,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:46,317 INFO L129 PetriNetUnfolder]: 1328/3696 cut-off events. [2021-12-14 16:56:46,317 INFO L130 PetriNetUnfolder]: For 218303/218303 co-relation queries the response was YES. [2021-12-14 16:56:46,353 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35448 conditions, 3696 events. 1328/3696 cut-off events. For 218303/218303 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 31754 event pairs, 74 based on Foata normal form. 4/3656 useless extension candidates. Maximal degree in co-relation 35295. Up to 608 conditions per place. [2021-12-14 16:56:46,373 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 283 selfloop transitions, 1254 changer transitions 19/1595 dead transitions. [2021-12-14 16:56:46,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1595 transitions, 35158 flow [2021-12-14 16:56:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-14 16:56:46,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-12-14 16:56:46,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3187 transitions. [2021-12-14 16:56:46,375 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6105363984674329 [2021-12-14 16:56:46,375 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3187 transitions. [2021-12-14 16:56:46,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3187 transitions. [2021-12-14 16:56:46,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:46,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3187 transitions. [2021-12-14 16:56:46,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 53.11666666666667) internal successors, (3187), 60 states have internal predecessors, (3187), 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) [2021-12-14 16:56:46,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 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) [2021-12-14 16:56:46,382 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 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) [2021-12-14 16:56:46,382 INFO L186 Difference]: Start difference. First operand has 617 places, 1215 transitions, 24467 flow. Second operand 60 states and 3187 transitions. [2021-12-14 16:56:46,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1595 transitions, 35158 flow [2021-12-14 16:56:47,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1595 transitions, 34016 flow, removed 47 selfloop flow, removed 37 redundant places. [2021-12-14 16:56:47,164 INFO L242 Difference]: Finished difference. Result has 645 places, 1519 transitions, 33649 flow [2021-12-14 16:56:47,165 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=23623, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=955, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=33649, PETRI_PLACES=645, PETRI_TRANSITIONS=1519} [2021-12-14 16:56:47,166 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 568 predicate places. [2021-12-14 16:56:47,166 INFO L470 AbstractCegarLoop]: Abstraction has has 645 places, 1519 transitions, 33649 flow [2021-12-14 16:56:47,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 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) [2021-12-14 16:56:47,166 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:47,166 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] [2021-12-14 16:56:47,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-14 16:56:47,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-14 16:56:47,368 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:47,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1801555279, now seen corresponding path program 8 times [2021-12-14 16:56:47,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:47,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000296659] [2021-12-14 16:56:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:47,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:47,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:47,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000296659] [2021-12-14 16:56:47,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000296659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:47,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807481368] [2021-12-14 16:56:47,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:56:47,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:47,495 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:47,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 16:56:47,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:56:47,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:56:47,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:56:47,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:47,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:48,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807481368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:56:48,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:56:48,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-14 16:56:48,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90141137] [2021-12-14 16:56:48,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:56:48,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 16:56:48,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:48,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 16:56:48,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 16:56:48,357 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-14 16:56:48,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 1519 transitions, 33649 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 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) [2021-12-14 16:56:48,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:48,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-14 16:56:48,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand