./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy7.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/test-easy7.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 89875838ba00841ab95f284d6aeb82a1a762d2b06c5f173202307480dc57b4e4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:09:46,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:09:46,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:09:46,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:09:46,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:09:46,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:09:46,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:09:46,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:09:46,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:09:46,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:09:46,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:09:46,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:09:46,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:09:46,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:09:46,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:09:46,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:09:46,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:09:46,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:09:46,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:09:46,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:09:46,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:09:46,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:09:46,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:09:46,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:09:46,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:09:46,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:09:46,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:09:46,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:09:46,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:09:46,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:09:46,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:09:46,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:09:46,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:09:46,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:09:46,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:09:46,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:09:46,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:09:46,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:09:46,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:09:46,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:09:46,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:09:46,804 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:09:46,822 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:09:46,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:09:46,822 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:09:46,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:09:46,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:09:46,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:09:46,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:09:46,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:09:46,824 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:09:46,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:09:46,825 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:09:46,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:09:46,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:09:46,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:09:46,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:09:46,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:09:46,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:09:46,826 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:09:46,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:09:46,826 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:09:46,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:09:46,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:09:46,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:09:46,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:09:46,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:09:46,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:09:46,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:09:46,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:09:46,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:09:46,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:09:46,829 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:09:46,829 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:09:46,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:09:46,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:09:46,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89875838ba00841ab95f284d6aeb82a1a762d2b06c5f173202307480dc57b4e4 [2021-12-16 03:09:46,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:09:47,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:09:47,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:09:47,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:09:47,013 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:09:47,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy7.wvr.c [2021-12-16 03:09:47,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44532120b/17ba43e997d2468a8558f48f5e9b8316/FLAGa27b6684a [2021-12-16 03:09:47,423 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:09:47,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy7.wvr.c [2021-12-16 03:09:47,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44532120b/17ba43e997d2468a8558f48f5e9b8316/FLAGa27b6684a [2021-12-16 03:09:47,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44532120b/17ba43e997d2468a8558f48f5e9b8316 [2021-12-16 03:09:47,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:09:47,859 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:09:47,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:09:47,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:09:47,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:09:47,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:09:47" (1/1) ... [2021-12-16 03:09:47,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41592616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:47, skipping insertion in model container [2021-12-16 03:09:47,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:09:47" (1/1) ... [2021-12-16 03:09:47,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:09:47,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:09:48,020 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-easy7.wvr.c[1872,1885] [2021-12-16 03:09:48,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:09:48,033 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:09:48,056 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-easy7.wvr.c[1872,1885] [2021-12-16 03:09:48,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:09:48,068 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:09:48,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:48 WrapperNode [2021-12-16 03:09:48,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:09:48,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:09:48,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:09:48,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:09:48,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:48" (1/1) ... [2021-12-16 03:09:48,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:48" (1/1) ... [2021-12-16 03:09:48,093 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2021-12-16 03:09:48,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:09:48,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:09:48,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:09:48,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:09:48,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:48" (1/1) ... [2021-12-16 03:09:48,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:48" (1/1) ... [2021-12-16 03:09:48,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:48" (1/1) ... [2021-12-16 03:09:48,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:48" (1/1) ... [2021-12-16 03:09:48,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:48" (1/1) ... [2021-12-16 03:09:48,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:48" (1/1) ... [2021-12-16 03:09:48,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:48" (1/1) ... [2021-12-16 03:09:48,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:09:48,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:09:48,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:09:48,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:09:48,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:48" (1/1) ... [2021-12-16 03:09:48,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:09:48,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:48,136 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) [2021-12-16 03:09:48,141 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 [2021-12-16 03:09:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:09:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:09:48,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:09:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:09:48,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:09:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:09:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:09:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:09:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:09:48,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:09:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:09:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:09:48,160 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 03:09:48,208 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:09:48,209 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:09:48,312 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:09:48,317 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:09:48,317 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 03:09:48,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:09:48 BoogieIcfgContainer [2021-12-16 03:09:48,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:09:48,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:09:48,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:09:48,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:09:48,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:09:47" (1/3) ... [2021-12-16 03:09:48,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@791d7c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:09:48, skipping insertion in model container [2021-12-16 03:09:48,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:48" (2/3) ... [2021-12-16 03:09:48,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@791d7c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:09:48, skipping insertion in model container [2021-12-16 03:09:48,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:09:48" (3/3) ... [2021-12-16 03:09:48,339 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy7.wvr.c [2021-12-16 03:09:48,343 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:09:48,343 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:09:48,343 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:09:48,343 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:09:48,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,371 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,371 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,371 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,371 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,371 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,371 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,373 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,373 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,373 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,373 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,373 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,373 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,374 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,374 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,374 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,374 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,374 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,374 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,375 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,375 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,375 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,375 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,378 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,378 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,378 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,378 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,378 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,379 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,379 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,379 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,380 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,380 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,380 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,380 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,380 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,380 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,381 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,387 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:48,389 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-16 03:09:48,423 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:09:48,431 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 [2021-12-16 03:09:48,431 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 03:09:48,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 204 flow [2021-12-16 03:09:48,468 INFO L129 PetriNetUnfolder]: 2/92 cut-off events. [2021-12-16 03:09:48,469 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:09:48,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 2/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2021-12-16 03:09:48,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 94 transitions, 204 flow [2021-12-16 03:09:48,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 83 transitions, 178 flow [2021-12-16 03:09:48,502 INFO L129 PetriNetUnfolder]: 2/82 cut-off events. [2021-12-16 03:09:48,503 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:09:48,504 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:48,505 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:48,506 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:48,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:48,514 INFO L85 PathProgramCache]: Analyzing trace with hash 126118782, now seen corresponding path program 1 times [2021-12-16 03:09:48,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:48,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059955648] [2021-12-16 03:09:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:48,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:49,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:49,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059955648] [2021-12-16 03:09:49,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059955648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:49,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:49,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:09:49,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132752649] [2021-12-16 03:09:49,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:49,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:09:49,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:09:49,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:09:49,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:09:49,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 178 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:49,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:49,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:09:49,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:50,447 INFO L129 PetriNetUnfolder]: 179/513 cut-off events. [2021-12-16 03:09:50,447 INFO L130 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2021-12-16 03:09:50,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 513 events. 179/513 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2096 event pairs, 133 based on Foata normal form. 3/508 useless extension candidates. Maximal degree in co-relation 822. Up to 332 conditions per place. [2021-12-16 03:09:50,451 INFO L132 encePairwiseOnDemand]: 60/94 looper letters, 47 selfloop transitions, 28 changer transitions 34/148 dead transitions. [2021-12-16 03:09:50,452 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 148 transitions, 535 flow [2021-12-16 03:09:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 03:09:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-16 03:09:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1583 transitions. [2021-12-16 03:09:50,470 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5613475177304964 [2021-12-16 03:09:50,471 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1583 transitions. [2021-12-16 03:09:50,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1583 transitions. [2021-12-16 03:09:50,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:50,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1583 transitions. [2021-12-16 03:09:50,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 52.766666666666666) internal successors, (1583), 30 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,492 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,494 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 178 flow. Second operand 30 states and 1583 transitions. [2021-12-16 03:09:50,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 148 transitions, 535 flow [2021-12-16 03:09:50,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 521 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:09:50,505 INFO L242 Difference]: Finished difference. Result has 136 places, 103 transitions, 360 flow [2021-12-16 03:09:50,506 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=360, PETRI_PLACES=136, PETRI_TRANSITIONS=103} [2021-12-16 03:09:50,511 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 48 predicate places. [2021-12-16 03:09:50,511 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 103 transitions, 360 flow [2021-12-16 03:09:50,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,512 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:50,512 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:50,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:09:50,513 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:50,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1479619674, now seen corresponding path program 2 times [2021-12-16 03:09:50,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:50,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458230171] [2021-12-16 03:09:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:50,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:50,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:50,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458230171] [2021-12-16 03:09:50,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458230171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:50,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:50,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-16 03:09:50,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771740862] [2021-12-16 03:09:50,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:50,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 03:09:50,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 03:09:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:09:50,914 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:09:50,915 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 103 transitions, 360 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:50,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:09:50,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:51,861 INFO L129 PetriNetUnfolder]: 202/559 cut-off events. [2021-12-16 03:09:51,862 INFO L130 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2021-12-16 03:09:51,864 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 559 events. 202/559 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2482 event pairs, 22 based on Foata normal form. 1/558 useless extension candidates. Maximal degree in co-relation 1515. Up to 329 conditions per place. [2021-12-16 03:09:51,867 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 82 selfloop transitions, 42 changer transitions 36/199 dead transitions. [2021-12-16 03:09:51,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 199 transitions, 1049 flow [2021-12-16 03:09:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 03:09:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-16 03:09:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1561 transitions. [2021-12-16 03:09:51,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5726338958180485 [2021-12-16 03:09:51,887 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1561 transitions. [2021-12-16 03:09:51,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1561 transitions. [2021-12-16 03:09:51,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:51,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1561 transitions. [2021-12-16 03:09:51,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.827586206896555) internal successors, (1561), 29 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,894 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,894 INFO L186 Difference]: Start difference. First operand has 136 places, 103 transitions, 360 flow. Second operand 29 states and 1561 transitions. [2021-12-16 03:09:51,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 199 transitions, 1049 flow [2021-12-16 03:09:51,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 199 transitions, 955 flow, removed 38 selfloop flow, removed 13 redundant places. [2021-12-16 03:09:51,916 INFO L242 Difference]: Finished difference. Result has 156 places, 139 transitions, 637 flow [2021-12-16 03:09:51,917 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=637, PETRI_PLACES=156, PETRI_TRANSITIONS=139} [2021-12-16 03:09:51,917 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 68 predicate places. [2021-12-16 03:09:51,918 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 139 transitions, 637 flow [2021-12-16 03:09:51,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:51,919 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:51,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:09:51,920 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1215992582, now seen corresponding path program 3 times [2021-12-16 03:09:51,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:51,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994244086] [2021-12-16 03:09:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:51,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:52,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:52,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994244086] [2021-12-16 03:09:52,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994244086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:52,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:52,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-16 03:09:52,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803611334] [2021-12-16 03:09:52,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:52,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 03:09:52,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:52,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 03:09:52,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:09:52,326 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:09:52,327 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 139 transitions, 637 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:52,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:52,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:09:52,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:53,647 INFO L129 PetriNetUnfolder]: 240/651 cut-off events. [2021-12-16 03:09:53,648 INFO L130 PetriNetUnfolder]: For 828/828 co-relation queries the response was YES. [2021-12-16 03:09:53,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 651 events. 240/651 cut-off events. For 828/828 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3070 event pairs, 42 based on Foata normal form. 1/649 useless extension candidates. Maximal degree in co-relation 2226. Up to 401 conditions per place. [2021-12-16 03:09:53,653 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 102 selfloop transitions, 56 changer transitions 43/240 dead transitions. [2021-12-16 03:09:53,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 240 transitions, 1595 flow [2021-12-16 03:09:53,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-16 03:09:53,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-16 03:09:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2062 transitions. [2021-12-16 03:09:53,657 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624659028914348 [2021-12-16 03:09:53,657 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2062 transitions. [2021-12-16 03:09:53,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2062 transitions. [2021-12-16 03:09:53,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:53,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2062 transitions. [2021-12-16 03:09:53,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.87179487179487) internal successors, (2062), 39 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,668 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,668 INFO L186 Difference]: Start difference. First operand has 156 places, 139 transitions, 637 flow. Second operand 39 states and 2062 transitions. [2021-12-16 03:09:53,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 240 transitions, 1595 flow [2021-12-16 03:09:53,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 240 transitions, 1454 flow, removed 66 selfloop flow, removed 11 redundant places. [2021-12-16 03:09:53,679 INFO L242 Difference]: Finished difference. Result has 201 places, 182 transitions, 1065 flow [2021-12-16 03:09:53,679 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1065, PETRI_PLACES=201, PETRI_TRANSITIONS=182} [2021-12-16 03:09:53,680 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 113 predicate places. [2021-12-16 03:09:53,680 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 182 transitions, 1065 flow [2021-12-16 03:09:53,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,680 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:53,681 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:53,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:09:53,681 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1665333946, now seen corresponding path program 4 times [2021-12-16 03:09:53,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:53,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480864556] [2021-12-16 03:09:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:53,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:54,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:54,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480864556] [2021-12-16 03:09:54,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480864556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:54,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:54,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:09:54,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49364890] [2021-12-16 03:09:54,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:54,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:09:54,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:09:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:09:54,030 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:09:54,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 182 transitions, 1065 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:54,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:09:54,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:54,927 INFO L129 PetriNetUnfolder]: 238/637 cut-off events. [2021-12-16 03:09:54,928 INFO L130 PetriNetUnfolder]: For 1491/1491 co-relation queries the response was YES. [2021-12-16 03:09:54,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2624 conditions, 637 events. 238/637 cut-off events. For 1491/1491 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2989 event pairs, 3 based on Foata normal form. 1/637 useless extension candidates. Maximal degree in co-relation 2564. Up to 403 conditions per place. [2021-12-16 03:09:54,934 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 111 selfloop transitions, 53 changer transitions 44/247 dead transitions. [2021-12-16 03:09:54,934 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 247 transitions, 1855 flow [2021-12-16 03:09:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 03:09:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-16 03:09:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1502 transitions. [2021-12-16 03:09:54,937 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5706686930091185 [2021-12-16 03:09:54,937 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1502 transitions. [2021-12-16 03:09:54,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1502 transitions. [2021-12-16 03:09:54,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:54,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1502 transitions. [2021-12-16 03:09:54,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 53.642857142857146) internal successors, (1502), 28 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,944 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,944 INFO L186 Difference]: Start difference. First operand has 201 places, 182 transitions, 1065 flow. Second operand 28 states and 1502 transitions. [2021-12-16 03:09:54,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 247 transitions, 1855 flow [2021-12-16 03:09:54,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 247 transitions, 1633 flow, removed 89 selfloop flow, removed 18 redundant places. [2021-12-16 03:09:54,956 INFO L242 Difference]: Finished difference. Result has 213 places, 187 transitions, 1114 flow [2021-12-16 03:09:54,956 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1114, PETRI_PLACES=213, PETRI_TRANSITIONS=187} [2021-12-16 03:09:54,957 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 125 predicate places. [2021-12-16 03:09:54,957 INFO L470 AbstractCegarLoop]: Abstraction has has 213 places, 187 transitions, 1114 flow [2021-12-16 03:09:54,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,958 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:54,958 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:54,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:09:54,958 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:54,959 INFO L85 PathProgramCache]: Analyzing trace with hash 699227332, now seen corresponding path program 5 times [2021-12-16 03:09:54,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:54,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825895195] [2021-12-16 03:09:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:54,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:55,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:55,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825895195] [2021-12-16 03:09:55,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825895195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:55,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:55,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:09:55,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716272169] [2021-12-16 03:09:55,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:55,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:09:55,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:55,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:09:55,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:09:55,283 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:09:55,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 187 transitions, 1114 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:55,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:55,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:09:55,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:56,430 INFO L129 PetriNetUnfolder]: 261/695 cut-off events. [2021-12-16 03:09:56,430 INFO L130 PetriNetUnfolder]: For 1977/1977 co-relation queries the response was YES. [2021-12-16 03:09:56,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2995 conditions, 695 events. 261/695 cut-off events. For 1977/1977 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3342 event pairs, 20 based on Foata normal form. 1/694 useless extension candidates. Maximal degree in co-relation 2932. Up to 446 conditions per place. [2021-12-16 03:09:56,436 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 131 selfloop transitions, 61 changer transitions 43/274 dead transitions. [2021-12-16 03:09:56,436 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 274 transitions, 2242 flow [2021-12-16 03:09:56,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-16 03:09:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-16 03:09:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1861 transitions. [2021-12-16 03:09:56,439 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5656534954407295 [2021-12-16 03:09:56,439 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1861 transitions. [2021-12-16 03:09:56,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1861 transitions. [2021-12-16 03:09:56,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:56,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1861 transitions. [2021-12-16 03:09:56,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.17142857142857) internal successors, (1861), 35 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,448 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,448 INFO L186 Difference]: Start difference. First operand has 213 places, 187 transitions, 1114 flow. Second operand 35 states and 1861 transitions. [2021-12-16 03:09:56,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 274 transitions, 2242 flow [2021-12-16 03:09:56,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 274 transitions, 1993 flow, removed 66 selfloop flow, removed 24 redundant places. [2021-12-16 03:09:56,462 INFO L242 Difference]: Finished difference. Result has 234 places, 215 transitions, 1438 flow [2021-12-16 03:09:56,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1438, PETRI_PLACES=234, PETRI_TRANSITIONS=215} [2021-12-16 03:09:56,465 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 146 predicate places. [2021-12-16 03:09:56,465 INFO L470 AbstractCegarLoop]: Abstraction has has 234 places, 215 transitions, 1438 flow [2021-12-16 03:09:56,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,465 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:56,466 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:56,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 03:09:56,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:56,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1519473010, now seen corresponding path program 6 times [2021-12-16 03:09:56,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:56,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614644058] [2021-12-16 03:09:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:56,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:56,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:56,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614644058] [2021-12-16 03:09:56,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614644058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:56,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:56,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:09:56,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87957640] [2021-12-16 03:09:56,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:56,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:09:56,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:09:56,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:09:56,799 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:09:56,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 215 transitions, 1438 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:56,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:09:56,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:57,871 INFO L129 PetriNetUnfolder]: 265/703 cut-off events. [2021-12-16 03:09:57,871 INFO L130 PetriNetUnfolder]: For 2379/2379 co-relation queries the response was YES. [2021-12-16 03:09:57,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 703 events. 265/703 cut-off events. For 2379/2379 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3416 event pairs, 19 based on Foata normal form. 1/702 useless extension candidates. Maximal degree in co-relation 3094. Up to 459 conditions per place. [2021-12-16 03:09:57,878 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 126 selfloop transitions, 74 changer transitions 43/282 dead transitions. [2021-12-16 03:09:57,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 282 transitions, 2337 flow [2021-12-16 03:09:57,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 03:09:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-16 03:09:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1657 transitions. [2021-12-16 03:09:57,882 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5686341798215512 [2021-12-16 03:09:57,882 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1657 transitions. [2021-12-16 03:09:57,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1657 transitions. [2021-12-16 03:09:57,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:57,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1657 transitions. [2021-12-16 03:09:57,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.45161290322581) internal successors, (1657), 31 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,892 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,892 INFO L186 Difference]: Start difference. First operand has 234 places, 215 transitions, 1438 flow. Second operand 31 states and 1657 transitions. [2021-12-16 03:09:57,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 282 transitions, 2337 flow [2021-12-16 03:09:57,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 282 transitions, 2057 flow, removed 109 selfloop flow, removed 23 redundant places. [2021-12-16 03:09:57,908 INFO L242 Difference]: Finished difference. Result has 245 places, 224 transitions, 1536 flow [2021-12-16 03:09:57,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1536, PETRI_PLACES=245, PETRI_TRANSITIONS=224} [2021-12-16 03:09:57,910 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 157 predicate places. [2021-12-16 03:09:57,910 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 224 transitions, 1536 flow [2021-12-16 03:09:57,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,910 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:57,911 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:57,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 03:09:57,911 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1201914780, now seen corresponding path program 7 times [2021-12-16 03:09:57,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:57,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485536153] [2021-12-16 03:09:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:57,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:58,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:58,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485536153] [2021-12-16 03:09:58,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485536153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:58,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:58,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:09:58,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661446296] [2021-12-16 03:09:58,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:58,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:09:58,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:58,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:09:58,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:09:58,321 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:09:58,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 224 transitions, 1536 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:58,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:58,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:09:58,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:59,385 INFO L129 PetriNetUnfolder]: 264/744 cut-off events. [2021-12-16 03:09:59,386 INFO L130 PetriNetUnfolder]: For 2495/2495 co-relation queries the response was YES. [2021-12-16 03:09:59,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3274 conditions, 744 events. 264/744 cut-off events. For 2495/2495 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3693 event pairs, 27 based on Foata normal form. 1/743 useless extension candidates. Maximal degree in co-relation 3200. Up to 448 conditions per place. [2021-12-16 03:09:59,393 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 124 selfloop transitions, 76 changer transitions 44/283 dead transitions. [2021-12-16 03:09:59,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 283 transitions, 2405 flow [2021-12-16 03:09:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 03:09:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-16 03:09:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2021-12-16 03:09:59,397 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2021-12-16 03:09:59,397 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2021-12-16 03:09:59,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2021-12-16 03:09:59,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:59,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2021-12-16 03:09:59,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:59,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:59,403 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:59,403 INFO L186 Difference]: Start difference. First operand has 245 places, 224 transitions, 1536 flow. Second operand 31 states and 1658 transitions. [2021-12-16 03:09:59,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 283 transitions, 2405 flow [2021-12-16 03:09:59,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 283 transitions, 2194 flow, removed 48 selfloop flow, removed 26 redundant places. [2021-12-16 03:09:59,418 INFO L242 Difference]: Finished difference. Result has 255 places, 224 transitions, 1617 flow [2021-12-16 03:09:59,418 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1617, PETRI_PLACES=255, PETRI_TRANSITIONS=224} [2021-12-16 03:09:59,419 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 167 predicate places. [2021-12-16 03:09:59,419 INFO L470 AbstractCegarLoop]: Abstraction has has 255 places, 224 transitions, 1617 flow [2021-12-16 03:09:59,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:59,420 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:59,420 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:59,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:09:59,420 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:59,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1783083334, now seen corresponding path program 8 times [2021-12-16 03:09:59,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:59,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937463666] [2021-12-16 03:09:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:59,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:59,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:59,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937463666] [2021-12-16 03:09:59,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937463666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:59,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:59,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:09:59,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220613675] [2021-12-16 03:09:59,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:59,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:09:59,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:59,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:09:59,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:09:59,721 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:09:59,722 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 224 transitions, 1617 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:59,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:59,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:09:59,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:00,696 INFO L129 PetriNetUnfolder]: 260/739 cut-off events. [2021-12-16 03:10:00,697 INFO L130 PetriNetUnfolder]: For 2601/2601 co-relation queries the response was YES. [2021-12-16 03:10:00,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3344 conditions, 739 events. 260/739 cut-off events. For 2601/2601 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3694 event pairs, 33 based on Foata normal form. 1/738 useless extension candidates. Maximal degree in co-relation 3265. Up to 456 conditions per place. [2021-12-16 03:10:00,704 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 126 selfloop transitions, 73 changer transitions 39/277 dead transitions. [2021-12-16 03:10:00,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 277 transitions, 2429 flow [2021-12-16 03:10:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 03:10:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-16 03:10:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1603 transitions. [2021-12-16 03:10:00,709 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5684397163120567 [2021-12-16 03:10:00,709 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1603 transitions. [2021-12-16 03:10:00,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1603 transitions. [2021-12-16 03:10:00,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:00,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1603 transitions. [2021-12-16 03:10:00,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.43333333333333) internal successors, (1603), 30 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:00,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:00,716 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:00,716 INFO L186 Difference]: Start difference. First operand has 255 places, 224 transitions, 1617 flow. Second operand 30 states and 1603 transitions. [2021-12-16 03:10:00,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 277 transitions, 2429 flow [2021-12-16 03:10:00,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 277 transitions, 2192 flow, removed 35 selfloop flow, removed 29 redundant places. [2021-12-16 03:10:00,734 INFO L242 Difference]: Finished difference. Result has 256 places, 223 transitions, 1629 flow [2021-12-16 03:10:00,735 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1629, PETRI_PLACES=256, PETRI_TRANSITIONS=223} [2021-12-16 03:10:00,737 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 168 predicate places. [2021-12-16 03:10:00,737 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 223 transitions, 1629 flow [2021-12-16 03:10:00,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:00,737 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:00,737 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:00,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 03:10:00,738 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:00,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:00,738 INFO L85 PathProgramCache]: Analyzing trace with hash -944030314, now seen corresponding path program 9 times [2021-12-16 03:10:00,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:00,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2168374] [2021-12-16 03:10:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:00,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:01,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:01,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2168374] [2021-12-16 03:10:01,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2168374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:01,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:01,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-16 03:10:01,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748709085] [2021-12-16 03:10:01,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:01,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 03:10:01,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:01,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 03:10:01,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-16 03:10:01,089 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:01,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 223 transitions, 1629 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:01,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:01,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:01,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:03,208 INFO L129 PetriNetUnfolder]: 261/726 cut-off events. [2021-12-16 03:10:03,208 INFO L130 PetriNetUnfolder]: For 2958/2958 co-relation queries the response was YES. [2021-12-16 03:10:03,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3403 conditions, 726 events. 261/726 cut-off events. For 2958/2958 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3615 event pairs, 28 based on Foata normal form. 1/724 useless extension candidates. Maximal degree in co-relation 3326. Up to 460 conditions per place. [2021-12-16 03:10:03,215 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 129 selfloop transitions, 94 changer transitions 29/291 dead transitions. [2021-12-16 03:10:03,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 291 transitions, 2637 flow [2021-12-16 03:10:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-16 03:10:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-16 03:10:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2205 transitions. [2021-12-16 03:10:03,218 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2021-12-16 03:10:03,218 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2205 transitions. [2021-12-16 03:10:03,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2205 transitions. [2021-12-16 03:10:03,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:03,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2205 transitions. [2021-12-16 03:10:03,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 52.5) internal successors, (2205), 42 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:03,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:03,225 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:03,225 INFO L186 Difference]: Start difference. First operand has 256 places, 223 transitions, 1629 flow. Second operand 42 states and 2205 transitions. [2021-12-16 03:10:03,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 291 transitions, 2637 flow [2021-12-16 03:10:03,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 291 transitions, 2381 flow, removed 68 selfloop flow, removed 28 redundant places. [2021-12-16 03:10:03,241 INFO L242 Difference]: Finished difference. Result has 273 places, 244 transitions, 1891 flow [2021-12-16 03:10:03,242 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1891, PETRI_PLACES=273, PETRI_TRANSITIONS=244} [2021-12-16 03:10:03,242 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 185 predicate places. [2021-12-16 03:10:03,242 INFO L470 AbstractCegarLoop]: Abstraction has has 273 places, 244 transitions, 1891 flow [2021-12-16 03:10:03,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:03,243 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:03,243 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:03,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 03:10:03,244 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:03,244 INFO L85 PathProgramCache]: Analyzing trace with hash -984614164, now seen corresponding path program 10 times [2021-12-16 03:10:03,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:03,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224725536] [2021-12-16 03:10:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:03,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:03,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:03,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224725536] [2021-12-16 03:10:03,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224725536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:03,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:03,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:10:03,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647160935] [2021-12-16 03:10:03,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:03,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:10:03,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:03,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:10:03,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:10:03,589 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:03,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 244 transitions, 1891 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:03,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:03,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:03,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:05,252 INFO L129 PetriNetUnfolder]: 261/745 cut-off events. [2021-12-16 03:10:05,252 INFO L130 PetriNetUnfolder]: For 3271/3271 co-relation queries the response was YES. [2021-12-16 03:10:05,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 745 events. 261/745 cut-off events. For 3271/3271 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3789 event pairs, 30 based on Foata normal form. 1/744 useless extension candidates. Maximal degree in co-relation 3521. Up to 477 conditions per place. [2021-12-16 03:10:05,259 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 138 selfloop transitions, 78 changer transitions 32/287 dead transitions. [2021-12-16 03:10:05,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 287 transitions, 2626 flow [2021-12-16 03:10:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 03:10:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-16 03:10:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1745 transitions. [2021-12-16 03:10:05,264 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5625402965828498 [2021-12-16 03:10:05,264 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1745 transitions. [2021-12-16 03:10:05,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1745 transitions. [2021-12-16 03:10:05,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:05,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1745 transitions. [2021-12-16 03:10:05,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:05,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:05,270 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:05,270 INFO L186 Difference]: Start difference. First operand has 273 places, 244 transitions, 1891 flow. Second operand 33 states and 1745 transitions. [2021-12-16 03:10:05,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 287 transitions, 2626 flow [2021-12-16 03:10:05,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 287 transitions, 2308 flow, removed 96 selfloop flow, removed 27 redundant places. [2021-12-16 03:10:05,290 INFO L242 Difference]: Finished difference. Result has 280 places, 241 transitions, 1804 flow [2021-12-16 03:10:05,290 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1804, PETRI_PLACES=280, PETRI_TRANSITIONS=241} [2021-12-16 03:10:05,291 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 192 predicate places. [2021-12-16 03:10:05,291 INFO L470 AbstractCegarLoop]: Abstraction has has 280 places, 241 transitions, 1804 flow [2021-12-16 03:10:05,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:05,291 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:05,291 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:05,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 03:10:05,292 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash 531479520, now seen corresponding path program 11 times [2021-12-16 03:10:05,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:05,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216656229] [2021-12-16 03:10:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:05,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:05,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:05,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216656229] [2021-12-16 03:10:05,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216656229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:05,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:05,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:10:05,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574107804] [2021-12-16 03:10:05,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:05,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:10:05,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:05,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:10:05,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:10:05,595 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:05,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 241 transitions, 1804 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:05,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:05,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:05,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:06,571 INFO L129 PetriNetUnfolder]: 251/709 cut-off events. [2021-12-16 03:10:06,572 INFO L130 PetriNetUnfolder]: For 2910/2910 co-relation queries the response was YES. [2021-12-16 03:10:06,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3439 conditions, 709 events. 251/709 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3481 event pairs, 22 based on Foata normal form. 1/709 useless extension candidates. Maximal degree in co-relation 3355. Up to 465 conditions per place. [2021-12-16 03:10:06,580 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 134 selfloop transitions, 75 changer transitions 26/274 dead transitions. [2021-12-16 03:10:06,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 274 transitions, 2427 flow [2021-12-16 03:10:06,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 03:10:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-16 03:10:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1639 transitions. [2021-12-16 03:10:06,584 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624571036376115 [2021-12-16 03:10:06,584 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1639 transitions. [2021-12-16 03:10:06,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1639 transitions. [2021-12-16 03:10:06,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:06,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1639 transitions. [2021-12-16 03:10:06,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:06,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:06,607 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:06,607 INFO L186 Difference]: Start difference. First operand has 280 places, 241 transitions, 1804 flow. Second operand 31 states and 1639 transitions. [2021-12-16 03:10:06,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 274 transitions, 2427 flow [2021-12-16 03:10:06,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 274 transitions, 2189 flow, removed 25 selfloop flow, removed 33 redundant places. [2021-12-16 03:10:06,622 INFO L242 Difference]: Finished difference. Result has 274 places, 234 transitions, 1729 flow [2021-12-16 03:10:06,622 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1729, PETRI_PLACES=274, PETRI_TRANSITIONS=234} [2021-12-16 03:10:06,623 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 186 predicate places. [2021-12-16 03:10:06,623 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 234 transitions, 1729 flow [2021-12-16 03:10:06,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:06,623 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:06,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:06,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 03:10:06,624 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:06,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:06,624 INFO L85 PathProgramCache]: Analyzing trace with hash -94536446, now seen corresponding path program 12 times [2021-12-16 03:10:06,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:06,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109261910] [2021-12-16 03:10:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:06,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:06,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:06,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109261910] [2021-12-16 03:10:06,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109261910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:06,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:06,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-16 03:10:06,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293509686] [2021-12-16 03:10:06,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:06,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 03:10:06,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:06,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 03:10:06,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:10:06,915 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:06,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 234 transitions, 1729 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:06,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:06,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:06,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:08,004 INFO L129 PetriNetUnfolder]: 244/703 cut-off events. [2021-12-16 03:10:08,004 INFO L130 PetriNetUnfolder]: For 2607/2607 co-relation queries the response was YES. [2021-12-16 03:10:08,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3296 conditions, 703 events. 244/703 cut-off events. For 2607/2607 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3416 event pairs, 26 based on Foata normal form. 1/703 useless extension candidates. Maximal degree in co-relation 3215. Up to 460 conditions per place. [2021-12-16 03:10:08,012 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 130 selfloop transitions, 75 changer transitions 19/263 dead transitions. [2021-12-16 03:10:08,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 263 transitions, 2301 flow [2021-12-16 03:10:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 03:10:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-16 03:10:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1633 transitions. [2021-12-16 03:10:08,013 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.560398078242965 [2021-12-16 03:10:08,014 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1633 transitions. [2021-12-16 03:10:08,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1633 transitions. [2021-12-16 03:10:08,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:08,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1633 transitions. [2021-12-16 03:10:08,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.67741935483871) internal successors, (1633), 31 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:08,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:08,018 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:08,018 INFO L186 Difference]: Start difference. First operand has 274 places, 234 transitions, 1729 flow. Second operand 31 states and 1633 transitions. [2021-12-16 03:10:08,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 263 transitions, 2301 flow [2021-12-16 03:10:08,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 263 transitions, 2097 flow, removed 17 selfloop flow, removed 33 redundant places. [2021-12-16 03:10:08,035 INFO L242 Difference]: Finished difference. Result has 267 places, 231 transitions, 1700 flow [2021-12-16 03:10:08,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1700, PETRI_PLACES=267, PETRI_TRANSITIONS=231} [2021-12-16 03:10:08,036 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 179 predicate places. [2021-12-16 03:10:08,036 INFO L470 AbstractCegarLoop]: Abstraction has has 267 places, 231 transitions, 1700 flow [2021-12-16 03:10:08,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:08,037 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:08,037 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:08,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 03:10:08,037 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:08,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1982707728, now seen corresponding path program 13 times [2021-12-16 03:10:08,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:08,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079670647] [2021-12-16 03:10:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:08,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:08,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:08,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079670647] [2021-12-16 03:10:08,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079670647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:08,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:08,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-16 03:10:08,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037667487] [2021-12-16 03:10:08,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:08,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 03:10:08,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 03:10:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-16 03:10:08,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:08,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 231 transitions, 1700 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:08,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:08,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:08,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:09,428 INFO L129 PetriNetUnfolder]: 238/685 cut-off events. [2021-12-16 03:10:09,428 INFO L130 PetriNetUnfolder]: For 2351/2351 co-relation queries the response was YES. [2021-12-16 03:10:09,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3180 conditions, 685 events. 238/685 cut-off events. For 2351/2351 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3224 event pairs, 29 based on Foata normal form. 1/683 useless extension candidates. Maximal degree in co-relation 3103. Up to 452 conditions per place. [2021-12-16 03:10:09,434 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 123 selfloop transitions, 65 changer transitions 26/253 dead transitions. [2021-12-16 03:10:09,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 253 transitions, 2225 flow [2021-12-16 03:10:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 03:10:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-16 03:10:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1677 transitions. [2021-12-16 03:10:09,436 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5575132978723404 [2021-12-16 03:10:09,436 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1677 transitions. [2021-12-16 03:10:09,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1677 transitions. [2021-12-16 03:10:09,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:09,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1677 transitions. [2021-12-16 03:10:09,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.40625) internal successors, (1677), 32 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:09,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:09,441 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:09,441 INFO L186 Difference]: Start difference. First operand has 267 places, 231 transitions, 1700 flow. Second operand 32 states and 1677 transitions. [2021-12-16 03:10:09,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 253 transitions, 2225 flow [2021-12-16 03:10:09,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 253 transitions, 2037 flow, removed 9 selfloop flow, removed 31 redundant places. [2021-12-16 03:10:09,453 INFO L242 Difference]: Finished difference. Result has 264 places, 215 transitions, 1558 flow [2021-12-16 03:10:09,453 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1558, PETRI_PLACES=264, PETRI_TRANSITIONS=215} [2021-12-16 03:10:09,454 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 176 predicate places. [2021-12-16 03:10:09,454 INFO L470 AbstractCegarLoop]: Abstraction has has 264 places, 215 transitions, 1558 flow [2021-12-16 03:10:09,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:09,454 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:09,454 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:09,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 03:10:09,455 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:09,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:09,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1690499486, now seen corresponding path program 14 times [2021-12-16 03:10:09,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:09,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749786698] [2021-12-16 03:10:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:09,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:09,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:09,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749786698] [2021-12-16 03:10:09,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749786698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:09,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:09,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:10:09,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824999455] [2021-12-16 03:10:09,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:09,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:10:09,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:10:09,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:10:09,752 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:09,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 215 transitions, 1558 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:09,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:09,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:09,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:10,870 INFO L129 PetriNetUnfolder]: 260/745 cut-off events. [2021-12-16 03:10:10,870 INFO L130 PetriNetUnfolder]: For 2600/2600 co-relation queries the response was YES. [2021-12-16 03:10:10,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 745 events. 260/745 cut-off events. For 2600/2600 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3749 event pairs, 38 based on Foata normal form. 1/743 useless extension candidates. Maximal degree in co-relation 3287. Up to 436 conditions per place. [2021-12-16 03:10:10,877 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 120 selfloop transitions, 83 changer transitions 42/284 dead transitions. [2021-12-16 03:10:10,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 284 transitions, 2512 flow [2021-12-16 03:10:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-16 03:10:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-16 03:10:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1861 transitions. [2021-12-16 03:10:10,879 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5656534954407295 [2021-12-16 03:10:10,879 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1861 transitions. [2021-12-16 03:10:10,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1861 transitions. [2021-12-16 03:10:10,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:10,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1861 transitions. [2021-12-16 03:10:10,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.17142857142857) internal successors, (1861), 35 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:10,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:10,892 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:10,892 INFO L186 Difference]: Start difference. First operand has 264 places, 215 transitions, 1558 flow. Second operand 35 states and 1861 transitions. [2021-12-16 03:10:10,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 284 transitions, 2512 flow [2021-12-16 03:10:10,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 284 transitions, 2221 flow, removed 45 selfloop flow, removed 29 redundant places. [2021-12-16 03:10:10,910 INFO L242 Difference]: Finished difference. Result has 256 places, 224 transitions, 1654 flow [2021-12-16 03:10:10,910 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1654, PETRI_PLACES=256, PETRI_TRANSITIONS=224} [2021-12-16 03:10:10,911 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 168 predicate places. [2021-12-16 03:10:10,911 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 224 transitions, 1654 flow [2021-12-16 03:10:10,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:10,912 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:10,912 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:10,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 03:10:10,912 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:10,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:10,912 INFO L85 PathProgramCache]: Analyzing trace with hash -958827984, now seen corresponding path program 15 times [2021-12-16 03:10:10,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:10,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857936393] [2021-12-16 03:10:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:10,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:11,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:11,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857936393] [2021-12-16 03:10:11,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857936393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:11,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:11,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:10:11,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880322319] [2021-12-16 03:10:11,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:11,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:10:11,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:11,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:10:11,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:10:11,295 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:11,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 224 transitions, 1654 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:11,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:11,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:11,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:12,294 INFO L129 PetriNetUnfolder]: 272/766 cut-off events. [2021-12-16 03:10:12,294 INFO L130 PetriNetUnfolder]: For 3723/3723 co-relation queries the response was YES. [2021-12-16 03:10:12,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3677 conditions, 766 events. 272/766 cut-off events. For 3723/3723 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3741 event pairs, 23 based on Foata normal form. 1/764 useless extension candidates. Maximal degree in co-relation 3600. Up to 458 conditions per place. [2021-12-16 03:10:12,302 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 138 selfloop transitions, 101 changer transitions 22/300 dead transitions. [2021-12-16 03:10:12,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 300 transitions, 2850 flow [2021-12-16 03:10:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-16 03:10:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-16 03:10:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1818 transitions. [2021-12-16 03:10:12,305 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5688360450563203 [2021-12-16 03:10:12,305 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1818 transitions. [2021-12-16 03:10:12,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1818 transitions. [2021-12-16 03:10:12,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:12,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1818 transitions. [2021-12-16 03:10:12,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.470588235294116) internal successors, (1818), 34 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:12,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:12,310 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:12,310 INFO L186 Difference]: Start difference. First operand has 256 places, 224 transitions, 1654 flow. Second operand 34 states and 1818 transitions. [2021-12-16 03:10:12,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 300 transitions, 2850 flow [2021-12-16 03:10:12,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 300 transitions, 2572 flow, removed 73 selfloop flow, removed 29 redundant places. [2021-12-16 03:10:12,327 INFO L242 Difference]: Finished difference. Result has 260 places, 251 transitions, 2016 flow [2021-12-16 03:10:12,327 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2016, PETRI_PLACES=260, PETRI_TRANSITIONS=251} [2021-12-16 03:10:12,328 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 172 predicate places. [2021-12-16 03:10:12,328 INFO L470 AbstractCegarLoop]: Abstraction has has 260 places, 251 transitions, 2016 flow [2021-12-16 03:10:12,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:12,328 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:12,328 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:12,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 03:10:12,329 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:12,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:12,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2084111022, now seen corresponding path program 16 times [2021-12-16 03:10:12,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:12,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107021352] [2021-12-16 03:10:12,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:12,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:12,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:12,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107021352] [2021-12-16 03:10:12,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107021352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:12,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:12,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-16 03:10:12,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373110557] [2021-12-16 03:10:12,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:12,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 03:10:12,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 03:10:12,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:10:12,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:12,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 251 transitions, 2016 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:12,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:12,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:12,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:13,473 INFO L129 PetriNetUnfolder]: 280/785 cut-off events. [2021-12-16 03:10:13,474 INFO L130 PetriNetUnfolder]: For 3920/3920 co-relation queries the response was YES. [2021-12-16 03:10:13,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3914 conditions, 785 events. 280/785 cut-off events. For 3920/3920 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3957 event pairs, 24 based on Foata normal form. 1/783 useless extension candidates. Maximal degree in co-relation 3839. Up to 487 conditions per place. [2021-12-16 03:10:13,482 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 151 selfloop transitions, 89 changer transitions 29/308 dead transitions. [2021-12-16 03:10:13,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 308 transitions, 3040 flow [2021-12-16 03:10:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 03:10:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-16 03:10:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1560 transitions. [2021-12-16 03:10:13,484 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5722670579603815 [2021-12-16 03:10:13,484 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1560 transitions. [2021-12-16 03:10:13,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1560 transitions. [2021-12-16 03:10:13,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:13,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1560 transitions. [2021-12-16 03:10:13,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.793103448275865) internal successors, (1560), 29 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:13,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:13,507 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:13,507 INFO L186 Difference]: Start difference. First operand has 260 places, 251 transitions, 2016 flow. Second operand 29 states and 1560 transitions. [2021-12-16 03:10:13,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 308 transitions, 3040 flow [2021-12-16 03:10:13,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 308 transitions, 2719 flow, removed 122 selfloop flow, removed 14 redundant places. [2021-12-16 03:10:13,526 INFO L242 Difference]: Finished difference. Result has 278 places, 259 transitions, 2077 flow [2021-12-16 03:10:13,527 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2077, PETRI_PLACES=278, PETRI_TRANSITIONS=259} [2021-12-16 03:10:13,527 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 190 predicate places. [2021-12-16 03:10:13,527 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 259 transitions, 2077 flow [2021-12-16 03:10:13,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:13,528 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:13,528 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:13,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 03:10:13,528 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:13,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:13,528 INFO L85 PathProgramCache]: Analyzing trace with hash 331956586, now seen corresponding path program 17 times [2021-12-16 03:10:13,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:13,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189479640] [2021-12-16 03:10:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:13,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:13,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:13,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189479640] [2021-12-16 03:10:13,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189479640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:13,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:13,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:10:13,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837631931] [2021-12-16 03:10:13,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:13,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:10:13,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:10:13,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:10:13,857 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:13,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 259 transitions, 2077 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:13,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:13,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:13,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:14,826 INFO L129 PetriNetUnfolder]: 278/780 cut-off events. [2021-12-16 03:10:14,826 INFO L130 PetriNetUnfolder]: For 4197/4197 co-relation queries the response was YES. [2021-12-16 03:10:14,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3994 conditions, 780 events. 278/780 cut-off events. For 4197/4197 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3900 event pairs, 25 based on Foata normal form. 1/778 useless extension candidates. Maximal degree in co-relation 3910. Up to 483 conditions per place. [2021-12-16 03:10:14,834 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 149 selfloop transitions, 85 changer transitions 35/308 dead transitions. [2021-12-16 03:10:14,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 308 transitions, 3007 flow [2021-12-16 03:10:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 03:10:14,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-16 03:10:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2021-12-16 03:10:14,836 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2021-12-16 03:10:14,836 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2021-12-16 03:10:14,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2021-12-16 03:10:14,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:14,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2021-12-16 03:10:14,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:14,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:14,840 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:14,840 INFO L186 Difference]: Start difference. First operand has 278 places, 259 transitions, 2077 flow. Second operand 31 states and 1658 transitions. [2021-12-16 03:10:14,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 308 transitions, 3007 flow [2021-12-16 03:10:14,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 308 transitions, 2721 flow, removed 64 selfloop flow, removed 27 redundant places. [2021-12-16 03:10:14,859 INFO L242 Difference]: Finished difference. Result has 286 places, 256 transitions, 2053 flow [2021-12-16 03:10:14,860 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2053, PETRI_PLACES=286, PETRI_TRANSITIONS=256} [2021-12-16 03:10:14,860 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 198 predicate places. [2021-12-16 03:10:14,860 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 256 transitions, 2053 flow [2021-12-16 03:10:14,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:14,861 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:14,861 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:14,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 03:10:14,861 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:14,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1742136890, now seen corresponding path program 18 times [2021-12-16 03:10:14,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:14,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995515537] [2021-12-16 03:10:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:14,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:15,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:15,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995515537] [2021-12-16 03:10:15,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995515537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:15,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:15,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:10:15,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609176257] [2021-12-16 03:10:15,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:15,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:10:15,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:15,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:10:15,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:10:15,225 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:15,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 256 transitions, 2053 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:15,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:15,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:15,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:16,241 INFO L129 PetriNetUnfolder]: 274/768 cut-off events. [2021-12-16 03:10:16,242 INFO L130 PetriNetUnfolder]: For 3942/3942 co-relation queries the response was YES. [2021-12-16 03:10:16,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3953 conditions, 768 events. 274/768 cut-off events. For 3942/3942 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3827 event pairs, 24 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 3868. Up to 481 conditions per place. [2021-12-16 03:10:16,250 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 147 selfloop transitions, 92 changer transitions 26/304 dead transitions. [2021-12-16 03:10:16,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 304 transitions, 2973 flow [2021-12-16 03:10:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 03:10:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-16 03:10:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1606 transitions. [2021-12-16 03:10:16,253 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5695035460992908 [2021-12-16 03:10:16,253 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1606 transitions. [2021-12-16 03:10:16,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1606 transitions. [2021-12-16 03:10:16,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:16,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1606 transitions. [2021-12-16 03:10:16,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.53333333333333) internal successors, (1606), 30 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:16,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:16,275 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:16,275 INFO L186 Difference]: Start difference. First operand has 286 places, 256 transitions, 2053 flow. Second operand 30 states and 1606 transitions. [2021-12-16 03:10:16,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 304 transitions, 2973 flow [2021-12-16 03:10:16,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 304 transitions, 2719 flow, removed 24 selfloop flow, removed 28 redundant places. [2021-12-16 03:10:16,294 INFO L242 Difference]: Finished difference. Result has 286 places, 259 transitions, 2104 flow [2021-12-16 03:10:16,294 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2104, PETRI_PLACES=286, PETRI_TRANSITIONS=259} [2021-12-16 03:10:16,295 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 198 predicate places. [2021-12-16 03:10:16,295 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 259 transitions, 2104 flow [2021-12-16 03:10:16,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:16,295 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:16,295 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:16,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 03:10:16,296 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:16,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:16,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2093389318, now seen corresponding path program 19 times [2021-12-16 03:10:16,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:16,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027278158] [2021-12-16 03:10:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:16,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:16,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:16,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027278158] [2021-12-16 03:10:16,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027278158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:16,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:16,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:10:16,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311129728] [2021-12-16 03:10:16,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:16,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:10:16,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:16,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:10:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:10:16,619 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:16,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 259 transitions, 2104 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:16,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:16,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:16,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:17,559 INFO L129 PetriNetUnfolder]: 280/787 cut-off events. [2021-12-16 03:10:17,559 INFO L130 PetriNetUnfolder]: For 4345/4345 co-relation queries the response was YES. [2021-12-16 03:10:17,563 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4093 conditions, 787 events. 280/787 cut-off events. For 4345/4345 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4001 event pairs, 26 based on Foata normal form. 1/784 useless extension candidates. Maximal degree in co-relation 4008. Up to 511 conditions per place. [2021-12-16 03:10:17,566 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 165 selfloop transitions, 78 changer transitions 30/312 dead transitions. [2021-12-16 03:10:17,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 312 transitions, 3125 flow [2021-12-16 03:10:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 03:10:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-16 03:10:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1651 transitions. [2021-12-16 03:10:17,568 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5665751544269046 [2021-12-16 03:10:17,568 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1651 transitions. [2021-12-16 03:10:17,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1651 transitions. [2021-12-16 03:10:17,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:17,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1651 transitions. [2021-12-16 03:10:17,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.25806451612903) internal successors, (1651), 31 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:17,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:17,572 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:17,572 INFO L186 Difference]: Start difference. First operand has 286 places, 259 transitions, 2104 flow. Second operand 31 states and 1651 transitions. [2021-12-16 03:10:17,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 312 transitions, 3125 flow [2021-12-16 03:10:17,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 312 transitions, 2890 flow, removed 47 selfloop flow, removed 26 redundant places. [2021-12-16 03:10:17,591 INFO L242 Difference]: Finished difference. Result has 297 places, 266 transitions, 2244 flow [2021-12-16 03:10:17,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2244, PETRI_PLACES=297, PETRI_TRANSITIONS=266} [2021-12-16 03:10:17,591 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 209 predicate places. [2021-12-16 03:10:17,592 INFO L470 AbstractCegarLoop]: Abstraction has has 297 places, 266 transitions, 2244 flow [2021-12-16 03:10:17,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:17,592 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:17,592 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:17,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 03:10:17,592 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:17,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:17,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1511959520, now seen corresponding path program 20 times [2021-12-16 03:10:17,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:17,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782163572] [2021-12-16 03:10:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:17,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:17,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:17,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782163572] [2021-12-16 03:10:17,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782163572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:17,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:17,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:10:17,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151076649] [2021-12-16 03:10:17,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:17,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:10:17,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:17,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:10:17,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:10:17,904 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:17,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 266 transitions, 2244 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:17,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:17,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:17,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:18,960 INFO L129 PetriNetUnfolder]: 278/777 cut-off events. [2021-12-16 03:10:18,960 INFO L130 PetriNetUnfolder]: For 4500/4500 co-relation queries the response was YES. [2021-12-16 03:10:18,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4146 conditions, 777 events. 278/777 cut-off events. For 4500/4500 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3913 event pairs, 24 based on Foata normal form. 1/774 useless extension candidates. Maximal degree in co-relation 4055. Up to 503 conditions per place. [2021-12-16 03:10:18,968 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 155 selfloop transitions, 86 changer transitions 30/310 dead transitions. [2021-12-16 03:10:18,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 310 transitions, 3174 flow [2021-12-16 03:10:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 03:10:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-16 03:10:18,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1701 transitions. [2021-12-16 03:10:18,969 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5654920212765957 [2021-12-16 03:10:18,969 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1701 transitions. [2021-12-16 03:10:18,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1701 transitions. [2021-12-16 03:10:18,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:18,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1701 transitions. [2021-12-16 03:10:18,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.15625) internal successors, (1701), 32 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:18,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:18,973 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:18,974 INFO L186 Difference]: Start difference. First operand has 297 places, 266 transitions, 2244 flow. Second operand 32 states and 1701 transitions. [2021-12-16 03:10:18,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 310 transitions, 3174 flow [2021-12-16 03:10:18,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 310 transitions, 2977 flow, removed 39 selfloop flow, removed 26 redundant places. [2021-12-16 03:10:18,996 INFO L242 Difference]: Finished difference. Result has 304 places, 264 transitions, 2304 flow [2021-12-16 03:10:18,996 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2304, PETRI_PLACES=304, PETRI_TRANSITIONS=264} [2021-12-16 03:10:18,996 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 216 predicate places. [2021-12-16 03:10:18,997 INFO L470 AbstractCegarLoop]: Abstraction has has 304 places, 264 transitions, 2304 flow [2021-12-16 03:10:18,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:18,997 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:18,997 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:18,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 03:10:18,997 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:18,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:18,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2051343124, now seen corresponding path program 21 times [2021-12-16 03:10:18,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:18,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689022362] [2021-12-16 03:10:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:18,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:19,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:19,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689022362] [2021-12-16 03:10:19,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689022362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:19,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:19,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:10:19,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010495891] [2021-12-16 03:10:19,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:19,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:10:19,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:19,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:10:19,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:10:19,323 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:19,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 264 transitions, 2304 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:19,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:19,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:19,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:20,317 INFO L129 PetriNetUnfolder]: 281/795 cut-off events. [2021-12-16 03:10:20,318 INFO L130 PetriNetUnfolder]: For 4956/4956 co-relation queries the response was YES. [2021-12-16 03:10:20,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4288 conditions, 795 events. 281/795 cut-off events. For 4956/4956 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4026 event pairs, 23 based on Foata normal form. 1/792 useless extension candidates. Maximal degree in co-relation 4196. Up to 476 conditions per place. [2021-12-16 03:10:20,325 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 151 selfloop transitions, 115 changer transitions 20/325 dead transitions. [2021-12-16 03:10:20,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 325 transitions, 3423 flow [2021-12-16 03:10:20,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-16 03:10:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-16 03:10:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1817 transitions. [2021-12-16 03:10:20,331 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.568523153942428 [2021-12-16 03:10:20,331 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1817 transitions. [2021-12-16 03:10:20,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1817 transitions. [2021-12-16 03:10:20,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:20,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1817 transitions. [2021-12-16 03:10:20,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.44117647058823) internal successors, (1817), 34 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:20,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:20,335 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:20,335 INFO L186 Difference]: Start difference. First operand has 304 places, 264 transitions, 2304 flow. Second operand 34 states and 1817 transitions. [2021-12-16 03:10:20,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 325 transitions, 3423 flow [2021-12-16 03:10:20,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 325 transitions, 3154 flow, removed 63 selfloop flow, removed 30 redundant places. [2021-12-16 03:10:20,356 INFO L242 Difference]: Finished difference. Result has 308 places, 280 transitions, 2581 flow [2021-12-16 03:10:20,357 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2581, PETRI_PLACES=308, PETRI_TRANSITIONS=280} [2021-12-16 03:10:20,357 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 220 predicate places. [2021-12-16 03:10:20,357 INFO L470 AbstractCegarLoop]: Abstraction has has 308 places, 280 transitions, 2581 flow [2021-12-16 03:10:20,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:20,357 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:20,358 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:20,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 03:10:20,358 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:20,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1916503756, now seen corresponding path program 22 times [2021-12-16 03:10:20,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:20,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176301606] [2021-12-16 03:10:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:20,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:20,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:20,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176301606] [2021-12-16 03:10:20,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176301606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:20,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:20,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:10:20,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763246830] [2021-12-16 03:10:20,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:20,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:10:20,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:20,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:10:20,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:10:20,657 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:20,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 280 transitions, 2581 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:20,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:20,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:20,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:22,141 INFO L129 PetriNetUnfolder]: 284/809 cut-off events. [2021-12-16 03:10:22,141 INFO L130 PetriNetUnfolder]: For 4572/4572 co-relation queries the response was YES. [2021-12-16 03:10:22,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4446 conditions, 809 events. 284/809 cut-off events. For 4572/4572 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4138 event pairs, 18 based on Foata normal form. 1/808 useless extension candidates. Maximal degree in co-relation 4352. Up to 513 conditions per place. [2021-12-16 03:10:22,156 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 165 selfloop transitions, 102 changer transitions 21/327 dead transitions. [2021-12-16 03:10:22,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 327 transitions, 3543 flow [2021-12-16 03:10:22,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 03:10:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-16 03:10:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1758 transitions. [2021-12-16 03:10:22,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5667311411992263 [2021-12-16 03:10:22,166 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1758 transitions. [2021-12-16 03:10:22,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1758 transitions. [2021-12-16 03:10:22,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:22,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1758 transitions. [2021-12-16 03:10:22,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.27272727272727) internal successors, (1758), 33 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:22,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:22,170 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:22,170 INFO L186 Difference]: Start difference. First operand has 308 places, 280 transitions, 2581 flow. Second operand 33 states and 1758 transitions. [2021-12-16 03:10:22,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 327 transitions, 3543 flow [2021-12-16 03:10:22,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 327 transitions, 3330 flow, removed 47 selfloop flow, removed 21 redundant places. [2021-12-16 03:10:22,195 INFO L242 Difference]: Finished difference. Result has 324 places, 286 transitions, 2726 flow [2021-12-16 03:10:22,196 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2726, PETRI_PLACES=324, PETRI_TRANSITIONS=286} [2021-12-16 03:10:22,196 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 236 predicate places. [2021-12-16 03:10:22,196 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 286 transitions, 2726 flow [2021-12-16 03:10:22,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:22,197 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:22,197 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:22,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-16 03:10:22,197 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash 31959134, now seen corresponding path program 23 times [2021-12-16 03:10:22,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:22,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383289876] [2021-12-16 03:10:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:22,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:22,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:22,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383289876] [2021-12-16 03:10:22,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383289876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:22,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:22,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:10:22,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34014005] [2021-12-16 03:10:22,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:22,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:10:22,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:22,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:10:22,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:10:22,474 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:22,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 286 transitions, 2726 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:22,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:22,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:22,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:23,420 INFO L129 PetriNetUnfolder]: 278/795 cut-off events. [2021-12-16 03:10:23,421 INFO L130 PetriNetUnfolder]: For 5015/5015 co-relation queries the response was YES. [2021-12-16 03:10:23,425 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4519 conditions, 795 events. 278/795 cut-off events. For 5015/5015 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4101 event pairs, 18 based on Foata normal form. 1/793 useless extension candidates. Maximal degree in co-relation 4419. Up to 491 conditions per place. [2021-12-16 03:10:23,427 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 156 selfloop transitions, 104 changer transitions 26/325 dead transitions. [2021-12-16 03:10:23,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 325 transitions, 3580 flow [2021-12-16 03:10:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 03:10:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-16 03:10:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2021-12-16 03:10:23,433 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2021-12-16 03:10:23,433 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2021-12-16 03:10:23,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2021-12-16 03:10:23,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:23,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2021-12-16 03:10:23,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:23,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:23,436 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:23,437 INFO L186 Difference]: Start difference. First operand has 324 places, 286 transitions, 2726 flow. Second operand 31 states and 1658 transitions. [2021-12-16 03:10:23,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 325 transitions, 3580 flow [2021-12-16 03:10:23,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 325 transitions, 3376 flow, removed 33 selfloop flow, removed 27 redundant places. [2021-12-16 03:10:23,462 INFO L242 Difference]: Finished difference. Result has 328 places, 278 transitions, 2727 flow [2021-12-16 03:10:23,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2727, PETRI_PLACES=328, PETRI_TRANSITIONS=278} [2021-12-16 03:10:23,463 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 240 predicate places. [2021-12-16 03:10:23,463 INFO L470 AbstractCegarLoop]: Abstraction has has 328 places, 278 transitions, 2727 flow [2021-12-16 03:10:23,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:23,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:23,463 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:23,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-16 03:10:23,464 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:23,464 INFO L85 PathProgramCache]: Analyzing trace with hash 608355172, now seen corresponding path program 24 times [2021-12-16 03:10:23,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:23,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011178291] [2021-12-16 03:10:23,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:23,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:23,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:23,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011178291] [2021-12-16 03:10:23,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011178291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:23,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:23,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:10:23,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578183628] [2021-12-16 03:10:23,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:23,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:10:23,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:23,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:10:23,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:10:23,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:23,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 278 transitions, 2727 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:23,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:23,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:23,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:24,670 INFO L129 PetriNetUnfolder]: 271/784 cut-off events. [2021-12-16 03:10:24,671 INFO L130 PetriNetUnfolder]: For 4867/4867 co-relation queries the response was YES. [2021-12-16 03:10:24,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 784 events. 271/784 cut-off events. For 4867/4867 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4016 event pairs, 20 based on Foata normal form. 1/782 useless extension candidates. Maximal degree in co-relation 4401. Up to 508 conditions per place. [2021-12-16 03:10:24,679 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 162 selfloop transitions, 92 changer transitions 18/311 dead transitions. [2021-12-16 03:10:24,679 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 311 transitions, 3473 flow [2021-12-16 03:10:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 03:10:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-16 03:10:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1597 transitions. [2021-12-16 03:10:24,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5663120567375887 [2021-12-16 03:10:24,680 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1597 transitions. [2021-12-16 03:10:24,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1597 transitions. [2021-12-16 03:10:24,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:24,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1597 transitions. [2021-12-16 03:10:24,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.233333333333334) internal successors, (1597), 30 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:24,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:24,683 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:24,683 INFO L186 Difference]: Start difference. First operand has 328 places, 278 transitions, 2727 flow. Second operand 30 states and 1597 transitions. [2021-12-16 03:10:24,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 311 transitions, 3473 flow [2021-12-16 03:10:24,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 311 transitions, 3185 flow, removed 17 selfloop flow, removed 31 redundant places. [2021-12-16 03:10:24,709 INFO L242 Difference]: Finished difference. Result has 322 places, 275 transitions, 2649 flow [2021-12-16 03:10:24,709 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2649, PETRI_PLACES=322, PETRI_TRANSITIONS=275} [2021-12-16 03:10:24,710 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 234 predicate places. [2021-12-16 03:10:24,710 INFO L470 AbstractCegarLoop]: Abstraction has has 322 places, 275 transitions, 2649 flow [2021-12-16 03:10:24,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:24,710 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:24,710 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:24,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-16 03:10:24,711 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:24,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:24,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1450990916, now seen corresponding path program 25 times [2021-12-16 03:10:24,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:24,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459663275] [2021-12-16 03:10:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:24,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:25,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:25,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459663275] [2021-12-16 03:10:25,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459663275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:25,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:25,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:10:25,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900916103] [2021-12-16 03:10:25,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:25,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:10:25,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:25,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:10:25,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:10:25,003 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:25,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 275 transitions, 2649 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:25,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:25,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:25,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:26,121 INFO L129 PetriNetUnfolder]: 278/802 cut-off events. [2021-12-16 03:10:26,121 INFO L130 PetriNetUnfolder]: For 5200/5200 co-relation queries the response was YES. [2021-12-16 03:10:26,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4589 conditions, 802 events. 278/802 cut-off events. For 5200/5200 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4112 event pairs, 18 based on Foata normal form. 1/801 useless extension candidates. Maximal degree in co-relation 4490. Up to 501 conditions per place. [2021-12-16 03:10:26,128 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 157 selfloop transitions, 105 changer transitions 21/322 dead transitions. [2021-12-16 03:10:26,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 322 transitions, 3642 flow [2021-12-16 03:10:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 03:10:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-16 03:10:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1756 transitions. [2021-12-16 03:10:26,137 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.56608639587363 [2021-12-16 03:10:26,137 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1756 transitions. [2021-12-16 03:10:26,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1756 transitions. [2021-12-16 03:10:26,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:26,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1756 transitions. [2021-12-16 03:10:26,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.21212121212121) internal successors, (1756), 33 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:26,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:26,141 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:26,141 INFO L186 Difference]: Start difference. First operand has 322 places, 275 transitions, 2649 flow. Second operand 33 states and 1756 transitions. [2021-12-16 03:10:26,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 322 transitions, 3642 flow [2021-12-16 03:10:26,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 322 transitions, 3376 flow, removed 21 selfloop flow, removed 31 redundant places. [2021-12-16 03:10:26,164 INFO L242 Difference]: Finished difference. Result has 326 places, 281 transitions, 2779 flow [2021-12-16 03:10:26,165 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2407, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2779, PETRI_PLACES=326, PETRI_TRANSITIONS=281} [2021-12-16 03:10:26,165 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 238 predicate places. [2021-12-16 03:10:26,166 INFO L470 AbstractCegarLoop]: Abstraction has has 326 places, 281 transitions, 2779 flow [2021-12-16 03:10:26,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:26,166 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:26,166 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:26,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-16 03:10:26,166 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:26,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:26,167 INFO L85 PathProgramCache]: Analyzing trace with hash -914775274, now seen corresponding path program 26 times [2021-12-16 03:10:26,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:26,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805163422] [2021-12-16 03:10:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:26,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:26,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:26,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805163422] [2021-12-16 03:10:26,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805163422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:26,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:26,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:10:26,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771311632] [2021-12-16 03:10:26,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:26,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:10:26,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:26,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:10:26,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:10:26,453 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:26,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 281 transitions, 2779 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:26,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:26,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:26,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:27,521 INFO L129 PetriNetUnfolder]: 271/797 cut-off events. [2021-12-16 03:10:27,521 INFO L130 PetriNetUnfolder]: For 5483/5483 co-relation queries the response was YES. [2021-12-16 03:10:27,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4598 conditions, 797 events. 271/797 cut-off events. For 5483/5483 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4149 event pairs, 22 based on Foata normal form. 1/795 useless extension candidates. Maximal degree in co-relation 4496. Up to 511 conditions per place. [2021-12-16 03:10:27,529 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 161 selfloop transitions, 96 changer transitions 18/314 dead transitions. [2021-12-16 03:10:27,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 314 transitions, 3533 flow [2021-12-16 03:10:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 03:10:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-16 03:10:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1647 transitions. [2021-12-16 03:10:27,531 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5652024708304736 [2021-12-16 03:10:27,531 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1647 transitions. [2021-12-16 03:10:27,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1647 transitions. [2021-12-16 03:10:27,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:27,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1647 transitions. [2021-12-16 03:10:27,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.12903225806452) internal successors, (1647), 31 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:27,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:27,535 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:27,535 INFO L186 Difference]: Start difference. First operand has 326 places, 281 transitions, 2779 flow. Second operand 31 states and 1647 transitions. [2021-12-16 03:10:27,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 314 transitions, 3533 flow [2021-12-16 03:10:27,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 314 transitions, 3325 flow, removed 39 selfloop flow, removed 26 redundant places. [2021-12-16 03:10:27,565 INFO L242 Difference]: Finished difference. Result has 331 places, 278 transitions, 2788 flow [2021-12-16 03:10:27,566 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2788, PETRI_PLACES=331, PETRI_TRANSITIONS=278} [2021-12-16 03:10:27,567 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 243 predicate places. [2021-12-16 03:10:27,567 INFO L470 AbstractCegarLoop]: Abstraction has has 331 places, 278 transitions, 2788 flow [2021-12-16 03:10:27,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:27,567 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:27,568 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:27,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-16 03:10:27,568 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:27,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2013754086, now seen corresponding path program 27 times [2021-12-16 03:10:27,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:27,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008709018] [2021-12-16 03:10:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:27,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:27,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:27,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008709018] [2021-12-16 03:10:27,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008709018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:27,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:27,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:10:27,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528356277] [2021-12-16 03:10:27,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:27,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:10:27,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:27,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:10:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:10:27,907 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:27,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 278 transitions, 2788 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:27,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:27,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:27,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:29,032 INFO L129 PetriNetUnfolder]: 278/817 cut-off events. [2021-12-16 03:10:29,032 INFO L130 PetriNetUnfolder]: For 5596/5596 co-relation queries the response was YES. [2021-12-16 03:10:29,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4751 conditions, 817 events. 278/817 cut-off events. For 5596/5596 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4247 event pairs, 19 based on Foata normal form. 1/816 useless extension candidates. Maximal degree in co-relation 4647. Up to 536 conditions per place. [2021-12-16 03:10:29,041 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 178 selfloop transitions, 84 changer transitions 21/322 dead transitions. [2021-12-16 03:10:29,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 322 transitions, 3757 flow [2021-12-16 03:10:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 03:10:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-16 03:10:29,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1748 transitions. [2021-12-16 03:10:29,043 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5635074145712443 [2021-12-16 03:10:29,043 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1748 transitions. [2021-12-16 03:10:29,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1748 transitions. [2021-12-16 03:10:29,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:29,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1748 transitions. [2021-12-16 03:10:29,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.96969696969697) internal successors, (1748), 33 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:29,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:29,046 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:29,046 INFO L186 Difference]: Start difference. First operand has 331 places, 278 transitions, 2788 flow. Second operand 33 states and 1748 transitions. [2021-12-16 03:10:29,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 322 transitions, 3757 flow [2021-12-16 03:10:29,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 322 transitions, 3429 flow, removed 29 selfloop flow, removed 33 redundant places. [2021-12-16 03:10:29,073 INFO L242 Difference]: Finished difference. Result has 333 places, 284 transitions, 2794 flow [2021-12-16 03:10:29,073 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2794, PETRI_PLACES=333, PETRI_TRANSITIONS=284} [2021-12-16 03:10:29,074 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 245 predicate places. [2021-12-16 03:10:29,074 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 284 transitions, 2794 flow [2021-12-16 03:10:29,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:29,074 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:29,074 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:29,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-16 03:10:29,075 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2005848438, now seen corresponding path program 28 times [2021-12-16 03:10:29,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:29,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61227257] [2021-12-16 03:10:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:29,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:29,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61227257] [2021-12-16 03:10:29,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61227257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:29,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:29,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:10:29,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551527770] [2021-12-16 03:10:29,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:29,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:10:29,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:10:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:10:29,366 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:29,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 284 transitions, 2794 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:29,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:29,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:29,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:30,393 INFO L129 PetriNetUnfolder]: 271/808 cut-off events. [2021-12-16 03:10:30,394 INFO L130 PetriNetUnfolder]: For 5581/5581 co-relation queries the response was YES. [2021-12-16 03:10:30,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4621 conditions, 808 events. 271/808 cut-off events. For 5581/5581 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4249 event pairs, 21 based on Foata normal form. 1/806 useless extension candidates. Maximal degree in co-relation 4515. Up to 540 conditions per place. [2021-12-16 03:10:30,403 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 179 selfloop transitions, 78 changer transitions 18/314 dead transitions. [2021-12-16 03:10:30,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 314 transitions, 3522 flow [2021-12-16 03:10:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 03:10:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-16 03:10:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1639 transitions. [2021-12-16 03:10:30,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624571036376115 [2021-12-16 03:10:30,417 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1639 transitions. [2021-12-16 03:10:30,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1639 transitions. [2021-12-16 03:10:30,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:30,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1639 transitions. [2021-12-16 03:10:30,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:30,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:30,422 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:30,422 INFO L186 Difference]: Start difference. First operand has 333 places, 284 transitions, 2794 flow. Second operand 31 states and 1639 transitions. [2021-12-16 03:10:30,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 314 transitions, 3522 flow [2021-12-16 03:10:30,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 314 transitions, 3340 flow, removed 33 selfloop flow, removed 26 redundant places. [2021-12-16 03:10:30,454 INFO L242 Difference]: Finished difference. Result has 338 places, 281 transitions, 2759 flow [2021-12-16 03:10:30,455 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2759, PETRI_PLACES=338, PETRI_TRANSITIONS=281} [2021-12-16 03:10:30,455 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 250 predicate places. [2021-12-16 03:10:30,455 INFO L470 AbstractCegarLoop]: Abstraction has has 338 places, 281 transitions, 2759 flow [2021-12-16 03:10:30,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:30,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:30,456 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:30,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-16 03:10:30,456 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:30,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:30,457 INFO L85 PathProgramCache]: Analyzing trace with hash 924134558, now seen corresponding path program 29 times [2021-12-16 03:10:30,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:30,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899177272] [2021-12-16 03:10:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:30,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:30,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:30,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899177272] [2021-12-16 03:10:30,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899177272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:30,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:30,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:10:30,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723874176] [2021-12-16 03:10:30,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:30,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:10:30,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:30,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:10:30,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:10:30,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:30,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 281 transitions, 2759 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:30,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:30,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:30,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:31,678 INFO L129 PetriNetUnfolder]: 271/815 cut-off events. [2021-12-16 03:10:31,679 INFO L130 PetriNetUnfolder]: For 5692/5692 co-relation queries the response was YES. [2021-12-16 03:10:31,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 815 events. 271/815 cut-off events. For 5692/5692 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4285 event pairs, 19 based on Foata normal form. 1/813 useless extension candidates. Maximal degree in co-relation 4579. Up to 486 conditions per place. [2021-12-16 03:10:31,686 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 154 selfloop transitions, 115 changer transitions 21/329 dead transitions. [2021-12-16 03:10:31,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 329 transitions, 3793 flow [2021-12-16 03:10:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 03:10:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-16 03:10:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1555 transitions. [2021-12-16 03:10:31,687 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5704328686720469 [2021-12-16 03:10:31,688 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1555 transitions. [2021-12-16 03:10:31,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1555 transitions. [2021-12-16 03:10:31,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:31,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1555 transitions. [2021-12-16 03:10:31,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.62068965517241) internal successors, (1555), 29 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:31,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:31,691 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:31,691 INFO L186 Difference]: Start difference. First operand has 338 places, 281 transitions, 2759 flow. Second operand 29 states and 1555 transitions. [2021-12-16 03:10:31,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 329 transitions, 3793 flow [2021-12-16 03:10:31,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 329 transitions, 3575 flow, removed 16 selfloop flow, removed 32 redundant places. [2021-12-16 03:10:31,721 INFO L242 Difference]: Finished difference. Result has 333 places, 286 transitions, 2919 flow [2021-12-16 03:10:31,721 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2919, PETRI_PLACES=333, PETRI_TRANSITIONS=286} [2021-12-16 03:10:31,722 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 245 predicate places. [2021-12-16 03:10:31,722 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 286 transitions, 2919 flow [2021-12-16 03:10:31,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:31,723 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:31,723 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:31,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-16 03:10:31,723 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:31,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:31,723 INFO L85 PathProgramCache]: Analyzing trace with hash -439693616, now seen corresponding path program 30 times [2021-12-16 03:10:31,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:31,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079303226] [2021-12-16 03:10:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:31,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:32,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:32,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079303226] [2021-12-16 03:10:32,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079303226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:32,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:32,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:10:32,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587488396] [2021-12-16 03:10:32,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:32,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:10:32,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:32,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:10:32,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:10:32,013 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:32,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 286 transitions, 2919 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:32,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:32,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:32,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:32,942 INFO L129 PetriNetUnfolder]: 271/790 cut-off events. [2021-12-16 03:10:32,942 INFO L130 PetriNetUnfolder]: For 6066/6066 co-relation queries the response was YES. [2021-12-16 03:10:32,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 790 events. 271/790 cut-off events. For 6066/6066 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4015 event pairs, 19 based on Foata normal form. 1/788 useless extension candidates. Maximal degree in co-relation 4592. Up to 474 conditions per place. [2021-12-16 03:10:32,950 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 152 selfloop transitions, 119 changer transitions 17/327 dead transitions. [2021-12-16 03:10:32,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 327 transitions, 3830 flow [2021-12-16 03:10:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 03:10:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-16 03:10:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1758 transitions. [2021-12-16 03:10:32,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5667311411992263 [2021-12-16 03:10:32,951 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1758 transitions. [2021-12-16 03:10:32,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1758 transitions. [2021-12-16 03:10:32,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:32,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1758 transitions. [2021-12-16 03:10:32,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.27272727272727) internal successors, (1758), 33 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:32,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:32,955 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:32,955 INFO L186 Difference]: Start difference. First operand has 333 places, 286 transitions, 2919 flow. Second operand 33 states and 1758 transitions. [2021-12-16 03:10:32,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 327 transitions, 3830 flow [2021-12-16 03:10:32,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 327 transitions, 3458 flow, removed 60 selfloop flow, removed 28 redundant places. [2021-12-16 03:10:32,984 INFO L242 Difference]: Finished difference. Result has 338 places, 288 transitions, 2900 flow [2021-12-16 03:10:32,985 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2900, PETRI_PLACES=338, PETRI_TRANSITIONS=288} [2021-12-16 03:10:32,985 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 250 predicate places. [2021-12-16 03:10:32,985 INFO L470 AbstractCegarLoop]: Abstraction has has 338 places, 288 transitions, 2900 flow [2021-12-16 03:10:32,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:32,985 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:32,986 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:32,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-16 03:10:32,986 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:32,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:32,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1178169136, now seen corresponding path program 31 times [2021-12-16 03:10:32,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:32,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732011] [2021-12-16 03:10:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:32,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:33,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:33,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732011] [2021-12-16 03:10:33,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:33,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:33,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:10:33,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687509011] [2021-12-16 03:10:33,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:33,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:10:33,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:33,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:10:33,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:10:33,277 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:33,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 288 transitions, 2900 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:33,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:33,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:33,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:34,431 INFO L129 PetriNetUnfolder]: 269/783 cut-off events. [2021-12-16 03:10:34,431 INFO L130 PetriNetUnfolder]: For 4995/4995 co-relation queries the response was YES. [2021-12-16 03:10:34,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4525 conditions, 783 events. 269/783 cut-off events. For 4995/4995 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3948 event pairs, 20 based on Foata normal form. 1/780 useless extension candidates. Maximal degree in co-relation 4421. Up to 474 conditions per place. [2021-12-16 03:10:34,439 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 150 selfloop transitions, 109 changer transitions 25/323 dead transitions. [2021-12-16 03:10:34,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 323 transitions, 3727 flow [2021-12-16 03:10:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 03:10:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-16 03:10:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1703 transitions. [2021-12-16 03:10:34,444 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.566156914893617 [2021-12-16 03:10:34,444 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1703 transitions. [2021-12-16 03:10:34,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1703 transitions. [2021-12-16 03:10:34,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:34,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1703 transitions. [2021-12-16 03:10:34,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.21875) internal successors, (1703), 32 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:34,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:34,448 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:34,448 INFO L186 Difference]: Start difference. First operand has 338 places, 288 transitions, 2900 flow. Second operand 32 states and 1703 transitions. [2021-12-16 03:10:34,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 323 transitions, 3727 flow [2021-12-16 03:10:34,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 323 transitions, 3449 flow, removed 30 selfloop flow, removed 26 redundant places. [2021-12-16 03:10:34,479 INFO L242 Difference]: Finished difference. Result has 344 places, 277 transitions, 2813 flow [2021-12-16 03:10:34,479 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2813, PETRI_PLACES=344, PETRI_TRANSITIONS=277} [2021-12-16 03:10:34,479 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 256 predicate places. [2021-12-16 03:10:34,479 INFO L470 AbstractCegarLoop]: Abstraction has has 344 places, 277 transitions, 2813 flow [2021-12-16 03:10:34,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:34,480 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:34,480 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:34,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-16 03:10:34,480 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash 400484758, now seen corresponding path program 32 times [2021-12-16 03:10:34,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:34,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575075131] [2021-12-16 03:10:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:34,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:34,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:34,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575075131] [2021-12-16 03:10:34,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575075131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:34,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:34,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:10:34,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255865575] [2021-12-16 03:10:34,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:34,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:10:34,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:34,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:10:34,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:10:34,780 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:34,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 277 transitions, 2813 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:34,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:34,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:34,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:37,003 INFO L129 PetriNetUnfolder]: 262/761 cut-off events. [2021-12-16 03:10:37,004 INFO L130 PetriNetUnfolder]: For 5125/5125 co-relation queries the response was YES. [2021-12-16 03:10:37,012 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4503 conditions, 761 events. 262/761 cut-off events. For 5125/5125 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3810 event pairs, 18 based on Foata normal form. 1/759 useless extension candidates. Maximal degree in co-relation 4394. Up to 494 conditions per place. [2021-12-16 03:10:37,016 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 163 selfloop transitions, 92 changer transitions 15/309 dead transitions. [2021-12-16 03:10:37,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 309 transitions, 3593 flow [2021-12-16 03:10:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 03:10:37,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-16 03:10:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1694 transitions. [2021-12-16 03:10:37,018 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5631648936170213 [2021-12-16 03:10:37,018 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1694 transitions. [2021-12-16 03:10:37,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1694 transitions. [2021-12-16 03:10:37,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:37,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1694 transitions. [2021-12-16 03:10:37,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.9375) internal successors, (1694), 32 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:37,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:37,021 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:37,022 INFO L186 Difference]: Start difference. First operand has 344 places, 277 transitions, 2813 flow. Second operand 32 states and 1694 transitions. [2021-12-16 03:10:37,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 309 transitions, 3593 flow [2021-12-16 03:10:37,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 309 transitions, 3256 flow, removed 28 selfloop flow, removed 36 redundant places. [2021-12-16 03:10:37,053 INFO L242 Difference]: Finished difference. Result has 336 places, 276 transitions, 2698 flow [2021-12-16 03:10:37,054 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2698, PETRI_PLACES=336, PETRI_TRANSITIONS=276} [2021-12-16 03:10:37,054 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 248 predicate places. [2021-12-16 03:10:37,054 INFO L470 AbstractCegarLoop]: Abstraction has has 336 places, 276 transitions, 2698 flow [2021-12-16 03:10:37,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:37,054 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:37,054 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:37,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-16 03:10:37,055 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:37,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:37,055 INFO L85 PathProgramCache]: Analyzing trace with hash 145279624, now seen corresponding path program 33 times [2021-12-16 03:10:37,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:37,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602857688] [2021-12-16 03:10:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:37,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:37,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:37,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602857688] [2021-12-16 03:10:37,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602857688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:37,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:37,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:10:37,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35438969] [2021-12-16 03:10:37,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:37,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:10:37,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:37,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:10:37,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:10:37,388 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:37,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 276 transitions, 2698 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:37,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:37,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:37,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:38,244 INFO L129 PetriNetUnfolder]: 257/748 cut-off events. [2021-12-16 03:10:38,244 INFO L130 PetriNetUnfolder]: For 4872/4872 co-relation queries the response was YES. [2021-12-16 03:10:38,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4347 conditions, 748 events. 257/748 cut-off events. For 4872/4872 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3729 event pairs, 20 based on Foata normal form. 1/745 useless extension candidates. Maximal degree in co-relation 4239. Up to 461 conditions per place. [2021-12-16 03:10:38,252 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 141 selfloop transitions, 106 changer transitions 20/306 dead transitions. [2021-12-16 03:10:38,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 306 transitions, 3432 flow [2021-12-16 03:10:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 03:10:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-16 03:10:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1600 transitions. [2021-12-16 03:10:38,253 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2021-12-16 03:10:38,253 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1600 transitions. [2021-12-16 03:10:38,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1600 transitions. [2021-12-16 03:10:38,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:38,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1600 transitions. [2021-12-16 03:10:38,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.333333333333336) internal successors, (1600), 30 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:38,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:38,257 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:38,257 INFO L186 Difference]: Start difference. First operand has 336 places, 276 transitions, 2698 flow. Second operand 30 states and 1600 transitions. [2021-12-16 03:10:38,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 306 transitions, 3432 flow [2021-12-16 03:10:38,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 306 transitions, 3217 flow, removed 15 selfloop flow, removed 31 redundant places. [2021-12-16 03:10:38,285 INFO L242 Difference]: Finished difference. Result has 333 places, 268 transitions, 2667 flow [2021-12-16 03:10:38,285 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2667, PETRI_PLACES=333, PETRI_TRANSITIONS=268} [2021-12-16 03:10:38,285 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 245 predicate places. [2021-12-16 03:10:38,285 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 268 transitions, 2667 flow [2021-12-16 03:10:38,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:38,285 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:38,286 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:38,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-16 03:10:38,286 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:38,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:38,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1614481682, now seen corresponding path program 34 times [2021-12-16 03:10:38,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:38,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377367651] [2021-12-16 03:10:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:38,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:38,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:38,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377367651] [2021-12-16 03:10:38,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377367651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:38,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:38,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:10:38,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565037649] [2021-12-16 03:10:38,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:38,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:10:38,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:38,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:10:38,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:10:38,579 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:38,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 268 transitions, 2667 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:38,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:38,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:38,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:39,484 INFO L129 PetriNetUnfolder]: 249/716 cut-off events. [2021-12-16 03:10:39,485 INFO L130 PetriNetUnfolder]: For 4476/4476 co-relation queries the response was YES. [2021-12-16 03:10:39,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4192 conditions, 716 events. 249/716 cut-off events. For 4476/4476 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3471 event pairs, 18 based on Foata normal form. 1/714 useless extension candidates. Maximal degree in co-relation 4086. Up to 456 conditions per place. [2021-12-16 03:10:39,492 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 141 selfloop transitions, 98 changer transitions 17/295 dead transitions. [2021-12-16 03:10:39,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 295 transitions, 3322 flow [2021-12-16 03:10:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 03:10:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-16 03:10:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1593 transitions. [2021-12-16 03:10:39,506 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5648936170212766 [2021-12-16 03:10:39,506 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1593 transitions. [2021-12-16 03:10:39,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1593 transitions. [2021-12-16 03:10:39,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:39,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1593 transitions. [2021-12-16 03:10:39,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.1) internal successors, (1593), 30 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:39,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:39,510 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:39,510 INFO L186 Difference]: Start difference. First operand has 333 places, 268 transitions, 2667 flow. Second operand 30 states and 1593 transitions. [2021-12-16 03:10:39,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 295 transitions, 3322 flow [2021-12-16 03:10:39,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 295 transitions, 3035 flow, removed 11 selfloop flow, removed 32 redundant places. [2021-12-16 03:10:39,534 INFO L242 Difference]: Finished difference. Result has 323 places, 261 transitions, 2546 flow [2021-12-16 03:10:39,534 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2546, PETRI_PLACES=323, PETRI_TRANSITIONS=261} [2021-12-16 03:10:39,535 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 235 predicate places. [2021-12-16 03:10:39,535 INFO L470 AbstractCegarLoop]: Abstraction has has 323 places, 261 transitions, 2546 flow [2021-12-16 03:10:39,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:39,535 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:39,535 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:39,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-16 03:10:39,536 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:39,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:39,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1987275834, now seen corresponding path program 35 times [2021-12-16 03:10:39,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:39,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894927754] [2021-12-16 03:10:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:39,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:39,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:39,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894927754] [2021-12-16 03:10:39,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894927754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:39,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:39,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:10:39,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3703405] [2021-12-16 03:10:39,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:39,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:10:39,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:10:39,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:10:39,835 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:39,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 261 transitions, 2546 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:39,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:39,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:39,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:40,784 INFO L129 PetriNetUnfolder]: 247/706 cut-off events. [2021-12-16 03:10:40,784 INFO L130 PetriNetUnfolder]: For 3899/3899 co-relation queries the response was YES. [2021-12-16 03:10:40,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4051 conditions, 706 events. 247/706 cut-off events. For 3899/3899 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3379 event pairs, 19 based on Foata normal form. 1/704 useless extension candidates. Maximal degree in co-relation 3951. Up to 460 conditions per place. [2021-12-16 03:10:40,791 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 148 selfloop transitions, 77 changer transitions 23/287 dead transitions. [2021-12-16 03:10:40,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 287 transitions, 3177 flow [2021-12-16 03:10:40,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 03:10:40,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-16 03:10:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1588 transitions. [2021-12-16 03:10:40,792 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5631205673758866 [2021-12-16 03:10:40,792 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1588 transitions. [2021-12-16 03:10:40,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1588 transitions. [2021-12-16 03:10:40,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:40,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1588 transitions. [2021-12-16 03:10:40,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 52.93333333333333) internal successors, (1588), 30 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:40,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:40,796 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:40,796 INFO L186 Difference]: Start difference. First operand has 323 places, 261 transitions, 2546 flow. Second operand 30 states and 1588 transitions. [2021-12-16 03:10:40,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 287 transitions, 3177 flow [2021-12-16 03:10:40,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 287 transitions, 2870 flow, removed 13 selfloop flow, removed 28 redundant places. [2021-12-16 03:10:40,816 INFO L242 Difference]: Finished difference. Result has 314 places, 249 transitions, 2275 flow [2021-12-16 03:10:40,817 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2275, PETRI_PLACES=314, PETRI_TRANSITIONS=249} [2021-12-16 03:10:40,817 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 226 predicate places. [2021-12-16 03:10:40,817 INFO L470 AbstractCegarLoop]: Abstraction has has 314 places, 249 transitions, 2275 flow [2021-12-16 03:10:40,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:40,817 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:40,817 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:40,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-16 03:10:40,817 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1554589640, now seen corresponding path program 36 times [2021-12-16 03:10:40,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:40,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050199842] [2021-12-16 03:10:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:40,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:41,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:41,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050199842] [2021-12-16 03:10:41,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050199842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:41,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:41,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-16 03:10:41,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565049390] [2021-12-16 03:10:41,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:41,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 03:10:41,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:41,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 03:10:41,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:10:41,124 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:41,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 249 transitions, 2275 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:41,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:41,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:41,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:42,239 INFO L129 PetriNetUnfolder]: 245/699 cut-off events. [2021-12-16 03:10:42,240 INFO L130 PetriNetUnfolder]: For 3698/3698 co-relation queries the response was YES. [2021-12-16 03:10:42,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3868 conditions, 699 events. 245/699 cut-off events. For 3698/3698 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3317 event pairs, 17 based on Foata normal form. 1/698 useless extension candidates. Maximal degree in co-relation 3770. Up to 454 conditions per place. [2021-12-16 03:10:42,247 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 141 selfloop transitions, 87 changer transitions 16/283 dead transitions. [2021-12-16 03:10:42,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 283 transitions, 3002 flow [2021-12-16 03:10:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-16 03:10:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-16 03:10:42,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1841 transitions. [2021-12-16 03:10:42,249 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5595744680851064 [2021-12-16 03:10:42,249 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1841 transitions. [2021-12-16 03:10:42,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1841 transitions. [2021-12-16 03:10:42,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:42,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1841 transitions. [2021-12-16 03:10:42,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.6) internal successors, (1841), 35 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:42,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:42,257 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:42,258 INFO L186 Difference]: Start difference. First operand has 314 places, 249 transitions, 2275 flow. Second operand 35 states and 1841 transitions. [2021-12-16 03:10:42,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 283 transitions, 3002 flow [2021-12-16 03:10:42,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 283 transitions, 2717 flow, removed 20 selfloop flow, removed 34 redundant places. [2021-12-16 03:10:42,281 INFO L242 Difference]: Finished difference. Result has 303 places, 251 transitions, 2242 flow [2021-12-16 03:10:42,282 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2242, PETRI_PLACES=303, PETRI_TRANSITIONS=251} [2021-12-16 03:10:42,282 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 215 predicate places. [2021-12-16 03:10:42,282 INFO L470 AbstractCegarLoop]: Abstraction has has 303 places, 251 transitions, 2242 flow [2021-12-16 03:10:42,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:42,282 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:42,283 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:42,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-16 03:10:42,283 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:42,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:42,283 INFO L85 PathProgramCache]: Analyzing trace with hash 141646928, now seen corresponding path program 37 times [2021-12-16 03:10:42,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:42,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698902605] [2021-12-16 03:10:42,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:42,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:42,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:42,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698902605] [2021-12-16 03:10:42,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698902605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:42,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:42,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-16 03:10:42,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176286142] [2021-12-16 03:10:42,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:42,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 03:10:42,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:42,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 03:10:42,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:10:42,577 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:42,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 251 transitions, 2242 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:42,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:42,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:42,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:43,722 INFO L129 PetriNetUnfolder]: 240/678 cut-off events. [2021-12-16 03:10:43,722 INFO L130 PetriNetUnfolder]: For 3710/3710 co-relation queries the response was YES. [2021-12-16 03:10:43,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3759 conditions, 678 events. 240/678 cut-off events. For 3710/3710 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3150 event pairs, 19 based on Foata normal form. 1/676 useless extension candidates. Maximal degree in co-relation 3665. Up to 450 conditions per place. [2021-12-16 03:10:43,729 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 139 selfloop transitions, 73 changer transitions 23/274 dead transitions. [2021-12-16 03:10:43,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 274 transitions, 2835 flow [2021-12-16 03:10:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 03:10:43,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-16 03:10:43,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1685 transitions. [2021-12-16 03:10:43,731 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5601728723404256 [2021-12-16 03:10:43,731 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1685 transitions. [2021-12-16 03:10:43,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1685 transitions. [2021-12-16 03:10:43,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:43,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1685 transitions. [2021-12-16 03:10:43,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.65625) internal successors, (1685), 32 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:43,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:43,739 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:43,739 INFO L186 Difference]: Start difference. First operand has 303 places, 251 transitions, 2242 flow. Second operand 32 states and 1685 transitions. [2021-12-16 03:10:43,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 274 transitions, 2835 flow [2021-12-16 03:10:43,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 274 transitions, 2597 flow, removed 31 selfloop flow, removed 30 redundant places. [2021-12-16 03:10:43,758 INFO L242 Difference]: Finished difference. Result has 302 places, 237 transitions, 2050 flow [2021-12-16 03:10:43,758 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2050, PETRI_PLACES=302, PETRI_TRANSITIONS=237} [2021-12-16 03:10:43,759 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 214 predicate places. [2021-12-16 03:10:43,759 INFO L470 AbstractCegarLoop]: Abstraction has has 302 places, 237 transitions, 2050 flow [2021-12-16 03:10:43,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:43,759 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:43,759 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:10:43,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-16 03:10:43,760 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:43,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1861913176, now seen corresponding path program 38 times [2021-12-16 03:10:43,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:43,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552156721] [2021-12-16 03:10:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:43,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:44,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:44,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552156721] [2021-12-16 03:10:44,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552156721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:44,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:10:44,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-16 03:10:44,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657270650] [2021-12-16 03:10:44,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:44,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 03:10:44,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:44,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 03:10:44,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:10:44,033 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-16 03:10:44,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 237 transitions, 2050 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:44,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:44,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-16 03:10:44,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:46,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []