./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-sre-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/chl-sre-subst.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 039f5312b62da5ff616f0ade8cc5a2dd494698e7519842b003d8d55f65a5fe6c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:17:06,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:17:06,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:17:06,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:17:06,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:17:06,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:17:06,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:17:06,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:17:06,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:17:06,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:17:06,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:17:06,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:17:06,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:17:06,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:17:06,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:17:06,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:17:06,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:17:06,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:17:06,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:17:06,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:17:06,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:17:06,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:17:06,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:17:06,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:17:06,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:17:06,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:17:06,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:17:06,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:17:06,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:17:06,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:17:06,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:17:06,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:17:06,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:17:06,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:17:06,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:17:06,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:17:06,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:17:06,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:17:06,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:17:06,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:17:06,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:17:06,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:17:06,740 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:17:06,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:17:06,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:17:06,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:17:06,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:17:06,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:17:06,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:17:06,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:17:06,742 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:17:06,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:17:06,743 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:17:06,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:17:06,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:17:06,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:17:06,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:17:06,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:17:06,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:17:06,744 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:17:06,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:17:06,745 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:17:06,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:17:06,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:17:06,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:17:06,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:17:06,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:17:06,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:17:06,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:17:06,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:17:06,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:17:06,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:17:06,747 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:17:06,747 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:17:06,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:17:06,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:17:06,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 039f5312b62da5ff616f0ade8cc5a2dd494698e7519842b003d8d55f65a5fe6c [2021-12-21 15:17:06,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:17:06,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:17:06,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:17:06,980 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:17:06,980 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:17:06,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-sre-subst.wvr.c [2021-12-21 15:17:07,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baaaa0eb0/46cc67ee3c1d4a938eb0cdf36892684d/FLAGed180d831 [2021-12-21 15:17:07,404 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:17:07,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-sre-subst.wvr.c [2021-12-21 15:17:07,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baaaa0eb0/46cc67ee3c1d4a938eb0cdf36892684d/FLAGed180d831 [2021-12-21 15:17:07,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baaaa0eb0/46cc67ee3c1d4a938eb0cdf36892684d [2021-12-21 15:17:07,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:17:07,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:17:07,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:17:07,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:17:07,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:17:07,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:17:07" (1/1) ... [2021-12-21 15:17:07,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d688438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07, skipping insertion in model container [2021-12-21 15:17:07,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:17:07" (1/1) ... [2021-12-21 15:17:07,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:17:07,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:17:07,650 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/chl-sre-subst.wvr.c[2333,2346] [2021-12-21 15:17:07,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:17:07,664 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:17:07,696 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/chl-sre-subst.wvr.c[2333,2346] [2021-12-21 15:17:07,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:17:07,708 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:17:07,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07 WrapperNode [2021-12-21 15:17:07,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:17:07,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:17:07,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:17:07,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:17:07,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07" (1/1) ... [2021-12-21 15:17:07,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07" (1/1) ... [2021-12-21 15:17:07,747 INFO L137 Inliner]: procedures = 22, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-12-21 15:17:07,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:17:07,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:17:07,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:17:07,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:17:07,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07" (1/1) ... [2021-12-21 15:17:07,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07" (1/1) ... [2021-12-21 15:17:07,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07" (1/1) ... [2021-12-21 15:17:07,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07" (1/1) ... [2021-12-21 15:17:07,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07" (1/1) ... [2021-12-21 15:17:07,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07" (1/1) ... [2021-12-21 15:17:07,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07" (1/1) ... [2021-12-21 15:17:07,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:17:07,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:17:07,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:17:07,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:17:07,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07" (1/1) ... [2021-12-21 15:17:07,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:17:07,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:07,814 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) [2021-12-21 15:17:07,821 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 [2021-12-21 15:17:07,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:17:07,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:17:07,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:17:07,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:17:07,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:17:07,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-21 15:17:07,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-21 15:17:07,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:17:07,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:17:07,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:17:07,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:17:07,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:17:07,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:17:07,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:17:07,842 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:17:07,911 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:17:07,912 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:17:08,085 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:17:08,091 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:17:08,091 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 15:17:08,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:17:08 BoogieIcfgContainer [2021-12-21 15:17:08,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:17:08,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:17:08,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:17:08,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:17:08,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:17:07" (1/3) ... [2021-12-21 15:17:08,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3803696e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:17:08, skipping insertion in model container [2021-12-21 15:17:08,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:07" (2/3) ... [2021-12-21 15:17:08,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3803696e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:17:08, skipping insertion in model container [2021-12-21 15:17:08,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:17:08" (3/3) ... [2021-12-21 15:17:08,102 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-sre-subst.wvr.c [2021-12-21 15:17:08,107 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:17:08,107 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:17:08,107 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:17:08,107 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:17:08,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,158 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,159 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,159 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,160 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,160 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,160 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,160 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,161 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,161 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,161 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,161 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,161 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,161 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,162 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,162 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,162 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,162 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,162 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,163 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,164 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,165 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,167 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,167 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,168 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,168 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,168 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,168 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,171 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,171 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,173 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,175 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,175 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,175 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,176 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,176 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,176 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,176 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,177 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,177 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,177 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,177 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,177 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,178 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,178 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,178 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,179 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,179 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,180 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,180 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,183 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,183 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,184 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,184 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,187 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,187 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,187 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,187 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,190 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,192 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,192 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,193 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:08,204 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-21 15:17:08,285 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:17:08,292 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 [2021-12-21 15:17:08,292 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-21 15:17:08,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 126 places, 124 transitions, 272 flow [2021-12-21 15:17:08,356 INFO L129 PetriNetUnfolder]: 8/121 cut-off events. [2021-12-21 15:17:08,356 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-21 15:17:08,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 121 events. 8/121 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 118 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2021-12-21 15:17:08,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 124 transitions, 272 flow [2021-12-21 15:17:08,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 110 transitions, 238 flow [2021-12-21 15:17:08,412 INFO L129 PetriNetUnfolder]: 8/109 cut-off events. [2021-12-21 15:17:08,412 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-21 15:17:08,412 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:08,413 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:08,413 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:08,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:08,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2142705332, now seen corresponding path program 1 times [2021-12-21 15:17:08,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:08,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543083724] [2021-12-21 15:17:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:08,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:08,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:08,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543083724] [2021-12-21 15:17:08,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543083724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:08,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:08,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:08,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012720451] [2021-12-21 15:17:08,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:08,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:08,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:08,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:08,813 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 124 [2021-12-21 15:17:08,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 110 transitions, 238 flow. Second operand has 8 states, 8 states have (on average 97.75) internal successors, (782), 8 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:08,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:08,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 124 [2021-12-21 15:17:08,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:09,008 INFO L129 PetriNetUnfolder]: 133/471 cut-off events. [2021-12-21 15:17:09,009 INFO L130 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2021-12-21 15:17:09,012 INFO L84 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 471 events. 133/471 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2364 event pairs, 30 based on Foata normal form. 6/453 useless extension candidates. Maximal degree in co-relation 615. Up to 68 conditions per place. [2021-12-21 15:17:09,015 INFO L132 encePairwiseOnDemand]: 109/124 looper letters, 49 selfloop transitions, 17 changer transitions 16/164 dead transitions. [2021-12-21 15:17:09,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 164 transitions, 549 flow [2021-12-21 15:17:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:17:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-21 15:17:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1324 transitions. [2021-12-21 15:17:09,028 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8213399503722084 [2021-12-21 15:17:09,029 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1324 transitions. [2021-12-21 15:17:09,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1324 transitions. [2021-12-21 15:17:09,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:09,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1324 transitions. [2021-12-21 15:17:09,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 101.84615384615384) internal successors, (1324), 13 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:09,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 124.0) internal successors, (1736), 14 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:09,044 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 124.0) internal successors, (1736), 14 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:09,045 INFO L186 Difference]: Start difference. First operand has 112 places, 110 transitions, 238 flow. Second operand 13 states and 1324 transitions. [2021-12-21 15:17:09,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 164 transitions, 549 flow [2021-12-21 15:17:09,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 164 transitions, 511 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-21 15:17:09,051 INFO L242 Difference]: Finished difference. Result has 125 places, 120 transitions, 331 flow [2021-12-21 15:17:09,052 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=331, PETRI_PLACES=125, PETRI_TRANSITIONS=120} [2021-12-21 15:17:09,055 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 13 predicate places. [2021-12-21 15:17:09,055 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 120 transitions, 331 flow [2021-12-21 15:17:09,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 97.75) internal successors, (782), 8 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:09,056 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:09,056 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:09,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:17:09,057 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:09,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:09,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1204171975, now seen corresponding path program 1 times [2021-12-21 15:17:09,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:09,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375672518] [2021-12-21 15:17:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:09,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:09,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:09,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375672518] [2021-12-21 15:17:09,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375672518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:09,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:09,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:09,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978158316] [2021-12-21 15:17:09,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:09,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:09,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:09,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:09,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:09,231 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:09,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 120 transitions, 331 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:09,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:09,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:09,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:09,453 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([307] L54-7-->L54-8: Formula: (= v_~result_5~0_1 |v_thread3Thread1of1ForFork1_#t~ite6_3|) InVars {thread3Thread1of1ForFork1_#t~ite6=|v_thread3Thread1of1ForFork1_#t~ite6_3|} OutVars{thread3Thread1of1ForFork1_#t~ite6=|v_thread3Thread1of1ForFork1_#t~ite6_3|, ~result_5~0=v_~result_5~0_1} AuxVars[] AssignedVars[~result_5~0][101], [Black: 150#(and (= ~result_5~0 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 8#L48-8true, 164#(and (= (* (div ~sponsored_2~0 256) 256) ~sponsored_2~0) (not (= (* (div ~sponsored_0~0 256) 256) ~sponsored_0~0))), 62#thread1ENTRYtrue, 10#L54-8true, Black: 140#(and (= ~result_5~0 0) (= |thread3Thread1of1ForFork1_#t~ite6| 0) (= ~result_4~0 0)), 19#L70-4true, 129#true, Black: 132#(= ~result_4~0 0), Black: 138#(and (= ~result_5~0 0) (= |thread2Thread1of1ForFork0_#t~ite4| 0) (= ~result_4~0 0)), Black: 134#(and (= ~result_5~0 0) (= ~result_4~0 0)), Black: 152#(and (= ~result_5~0 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 142#(and (= ~result_5~0 0) (= |thread3Thread1of1ForFork1_#t~ite6| 0) (= |thread2Thread1of1ForFork0_#t~ite4| 0) (= ~result_4~0 0))]) [2021-12-21 15:17:09,453 INFO L384 tUnfolder$Statistics]: this new event has 51 ancestors and is not cut-off event [2021-12-21 15:17:09,453 INFO L387 tUnfolder$Statistics]: existing Event has 53 ancestors and is not cut-off event [2021-12-21 15:17:09,453 INFO L387 tUnfolder$Statistics]: existing Event has 53 ancestors and is not cut-off event [2021-12-21 15:17:09,453 INFO L387 tUnfolder$Statistics]: existing Event has 53 ancestors and is not cut-off event [2021-12-21 15:17:09,460 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([307] L54-7-->L54-8: Formula: (= v_~result_5~0_1 |v_thread3Thread1of1ForFork1_#t~ite6_3|) InVars {thread3Thread1of1ForFork1_#t~ite6=|v_thread3Thread1of1ForFork1_#t~ite6_3|} OutVars{thread3Thread1of1ForFork1_#t~ite6=|v_thread3Thread1of1ForFork1_#t~ite6_3|, ~result_5~0=v_~result_5~0_1} AuxVars[] AssignedVars[~result_5~0][101], [Black: 150#(and (= ~result_5~0 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 8#L48-8true, 164#(and (= (* (div ~sponsored_2~0 256) 256) ~sponsored_2~0) (not (= (* (div ~sponsored_0~0 256) 256) ~sponsored_0~0))), 87#L42-2true, 10#L54-8true, Black: 140#(and (= ~result_5~0 0) (= |thread3Thread1of1ForFork1_#t~ite6| 0) (= ~result_4~0 0)), 19#L70-4true, 129#true, Black: 132#(= ~result_4~0 0), Black: 138#(and (= ~result_5~0 0) (= |thread2Thread1of1ForFork0_#t~ite4| 0) (= ~result_4~0 0)), Black: 134#(and (= ~result_5~0 0) (= ~result_4~0 0)), Black: 152#(and (= ~result_5~0 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 142#(and (= ~result_5~0 0) (= |thread3Thread1of1ForFork1_#t~ite6| 0) (= |thread2Thread1of1ForFork0_#t~ite4| 0) (= ~result_4~0 0))]) [2021-12-21 15:17:09,460 INFO L384 tUnfolder$Statistics]: this new event has 52 ancestors and is not cut-off event [2021-12-21 15:17:09,460 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is not cut-off event [2021-12-21 15:17:09,460 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is not cut-off event [2021-12-21 15:17:09,460 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is not cut-off event [2021-12-21 15:17:09,462 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([307] L54-7-->L54-8: Formula: (= v_~result_5~0_1 |v_thread3Thread1of1ForFork1_#t~ite6_3|) InVars {thread3Thread1of1ForFork1_#t~ite6=|v_thread3Thread1of1ForFork1_#t~ite6_3|} OutVars{thread3Thread1of1ForFork1_#t~ite6=|v_thread3Thread1of1ForFork1_#t~ite6_3|, ~result_5~0=v_~result_5~0_1} AuxVars[] AssignedVars[~result_5~0][101], [Black: 150#(and (= ~result_5~0 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 8#L48-8true, 164#(and (= (* (div ~sponsored_2~0 256) 256) ~sponsored_2~0) (not (= (* (div ~sponsored_0~0 256) 256) ~sponsored_0~0))), 79#L42true, 10#L54-8true, Black: 140#(and (= ~result_5~0 0) (= |thread3Thread1of1ForFork1_#t~ite6| 0) (= ~result_4~0 0)), 19#L70-4true, Black: 132#(= ~result_4~0 0), 129#true, Black: 138#(and (= ~result_5~0 0) (= |thread2Thread1of1ForFork0_#t~ite4| 0) (= ~result_4~0 0)), Black: 134#(and (= ~result_5~0 0) (= ~result_4~0 0)), Black: 152#(and (= ~result_5~0 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 142#(and (= ~result_5~0 0) (= |thread3Thread1of1ForFork1_#t~ite6| 0) (= |thread2Thread1of1ForFork0_#t~ite4| 0) (= ~result_4~0 0))]) [2021-12-21 15:17:09,462 INFO L384 tUnfolder$Statistics]: this new event has 52 ancestors and is not cut-off event [2021-12-21 15:17:09,462 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is not cut-off event [2021-12-21 15:17:09,462 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is not cut-off event [2021-12-21 15:17:09,462 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is not cut-off event [2021-12-21 15:17:09,466 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([307] L54-7-->L54-8: Formula: (= v_~result_5~0_1 |v_thread3Thread1of1ForFork1_#t~ite6_3|) InVars {thread3Thread1of1ForFork1_#t~ite6=|v_thread3Thread1of1ForFork1_#t~ite6_3|} OutVars{thread3Thread1of1ForFork1_#t~ite6=|v_thread3Thread1of1ForFork1_#t~ite6_3|, ~result_5~0=v_~result_5~0_1} AuxVars[] AssignedVars[~result_5~0][101], [Black: 150#(and (= ~result_5~0 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 8#L48-8true, 164#(and (= (* (div ~sponsored_2~0 256) 256) ~sponsored_2~0) (not (= (* (div ~sponsored_0~0 256) 256) ~sponsored_0~0))), 10#L54-8true, Black: 140#(and (= ~result_5~0 0) (= |thread3Thread1of1ForFork1_#t~ite6| 0) (= ~result_4~0 0)), 19#L70-4true, Black: 132#(= ~result_4~0 0), 129#true, Black: 138#(and (= ~result_5~0 0) (= |thread2Thread1of1ForFork0_#t~ite4| 0) (= ~result_4~0 0)), 82#L42-5true, Black: 134#(and (= ~result_5~0 0) (= ~result_4~0 0)), Black: 152#(and (= ~result_5~0 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 142#(and (= ~result_5~0 0) (= |thread3Thread1of1ForFork1_#t~ite6| 0) (= |thread2Thread1of1ForFork0_#t~ite4| 0) (= ~result_4~0 0))]) [2021-12-21 15:17:09,466 INFO L384 tUnfolder$Statistics]: this new event has 53 ancestors and is not cut-off event [2021-12-21 15:17:09,467 INFO L387 tUnfolder$Statistics]: existing Event has 55 ancestors and is not cut-off event [2021-12-21 15:17:09,467 INFO L387 tUnfolder$Statistics]: existing Event has 55 ancestors and is not cut-off event [2021-12-21 15:17:09,467 INFO L387 tUnfolder$Statistics]: existing Event has 55 ancestors and is not cut-off event [2021-12-21 15:17:09,468 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([307] L54-7-->L54-8: Formula: (= v_~result_5~0_1 |v_thread3Thread1of1ForFork1_#t~ite6_3|) InVars {thread3Thread1of1ForFork1_#t~ite6=|v_thread3Thread1of1ForFork1_#t~ite6_3|} OutVars{thread3Thread1of1ForFork1_#t~ite6=|v_thread3Thread1of1ForFork1_#t~ite6_3|, ~result_5~0=v_~result_5~0_1} AuxVars[] AssignedVars[~result_5~0][101], [Black: 150#(and (= ~result_5~0 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 8#L48-8true, 164#(and (= (* (div ~sponsored_2~0 256) 256) ~sponsored_2~0) (not (= (* (div ~sponsored_0~0 256) 256) ~sponsored_0~0))), 10#L54-8true, 90#L42-3true, Black: 140#(and (= ~result_5~0 0) (= |thread3Thread1of1ForFork1_#t~ite6| 0) (= ~result_4~0 0)), 19#L70-4true, 129#true, Black: 132#(= ~result_4~0 0), Black: 138#(and (= ~result_5~0 0) (= |thread2Thread1of1ForFork0_#t~ite4| 0) (= ~result_4~0 0)), Black: 134#(and (= ~result_5~0 0) (= ~result_4~0 0)), Black: 152#(and (= ~result_5~0 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 142#(and (= ~result_5~0 0) (= |thread3Thread1of1ForFork1_#t~ite6| 0) (= |thread2Thread1of1ForFork0_#t~ite4| 0) (= ~result_4~0 0))]) [2021-12-21 15:17:09,469 INFO L384 tUnfolder$Statistics]: this new event has 53 ancestors and is not cut-off event [2021-12-21 15:17:09,469 INFO L387 tUnfolder$Statistics]: existing Event has 55 ancestors and is not cut-off event [2021-12-21 15:17:09,469 INFO L387 tUnfolder$Statistics]: existing Event has 55 ancestors and is not cut-off event [2021-12-21 15:17:09,469 INFO L387 tUnfolder$Statistics]: existing Event has 55 ancestors and is not cut-off event [2021-12-21 15:17:09,515 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([307] L54-7-->L54-8: Formula: (= v_~result_5~0_1 |v_thread3Thread1of1ForFork1_#t~ite6_3|) InVars {thread3Thread1of1ForFork1_#t~ite6=|v_thread3Thread1of1ForFork1_#t~ite6_3|} OutVars{thread3Thread1of1ForFork1_#t~ite6=|v_thread3Thread1of1ForFork1_#t~ite6_3|, ~result_5~0=v_~result_5~0_1} AuxVars[] AssignedVars[~result_5~0][101], [Black: 150#(and (= ~result_5~0 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 113#L71-2true, 8#L48-8true, 164#(and (= (* (div ~sponsored_2~0 256) 256) ~sponsored_2~0) (not (= (* (div ~sponsored_0~0 256) 256) ~sponsored_0~0))), Black: 140#(and (= ~result_5~0 0) (= |thread3Thread1of1ForFork1_#t~ite6| 0) (= ~result_4~0 0)), 129#true, Black: 132#(= ~result_4~0 0), Black: 138#(and (= ~result_5~0 0) (= |thread2Thread1of1ForFork0_#t~ite4| 0) (= ~result_4~0 0)), Black: 134#(and (= ~result_5~0 0) (= ~result_4~0 0)), Black: 152#(and (= ~result_5~0 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 142#(and (= ~result_5~0 0) (= |thread3Thread1of1ForFork1_#t~ite6| 0) (= |thread2Thread1of1ForFork0_#t~ite4| 0) (= ~result_4~0 0)), 10#L54-8true]) [2021-12-21 15:17:09,515 INFO L384 tUnfolder$Statistics]: this new event has 62 ancestors and is not cut-off event [2021-12-21 15:17:09,515 INFO L387 tUnfolder$Statistics]: existing Event has 64 ancestors and is not cut-off event [2021-12-21 15:17:09,516 INFO L387 tUnfolder$Statistics]: existing Event has 64 ancestors and is not cut-off event [2021-12-21 15:17:09,516 INFO L387 tUnfolder$Statistics]: existing Event has 64 ancestors and is not cut-off event [2021-12-21 15:17:09,567 INFO L129 PetriNetUnfolder]: 498/2327 cut-off events. [2021-12-21 15:17:09,567 INFO L130 PetriNetUnfolder]: For 486/636 co-relation queries the response was YES. [2021-12-21 15:17:09,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4295 conditions, 2327 events. 498/2327 cut-off events. For 486/636 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21774 event pairs, 123 based on Foata normal form. 36/2071 useless extension candidates. Maximal degree in co-relation 4265. Up to 331 conditions per place. [2021-12-21 15:17:09,589 INFO L132 encePairwiseOnDemand]: 113/124 looper letters, 52 selfloop transitions, 7 changer transitions 0/155 dead transitions. [2021-12-21 15:17:09,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 155 transitions, 531 flow [2021-12-21 15:17:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:09,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 551 transitions. [2021-12-21 15:17:09,591 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8887096774193548 [2021-12-21 15:17:09,591 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 551 transitions. [2021-12-21 15:17:09,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 551 transitions. [2021-12-21 15:17:09,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:09,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 551 transitions. [2021-12-21 15:17:09,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:09,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:09,594 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:09,596 INFO L186 Difference]: Start difference. First operand has 125 places, 120 transitions, 331 flow. Second operand 5 states and 551 transitions. [2021-12-21 15:17:09,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 155 transitions, 531 flow [2021-12-21 15:17:09,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 155 transitions, 527 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-21 15:17:09,610 INFO L242 Difference]: Finished difference. Result has 124 places, 127 transitions, 397 flow [2021-12-21 15:17:09,610 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=397, PETRI_PLACES=124, PETRI_TRANSITIONS=127} [2021-12-21 15:17:09,611 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 12 predicate places. [2021-12-21 15:17:09,611 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 127 transitions, 397 flow [2021-12-21 15:17:09,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:09,612 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:09,612 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:09,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:17:09,613 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:09,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1498378015, now seen corresponding path program 2 times [2021-12-21 15:17:09,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:09,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136845477] [2021-12-21 15:17:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:09,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:09,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:09,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136845477] [2021-12-21 15:17:09,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136845477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:09,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:09,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:09,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232247711] [2021-12-21 15:17:09,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:09,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:09,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:09,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:09,763 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:09,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 127 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:09,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:09,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:09,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:10,050 INFO L129 PetriNetUnfolder]: 573/2563 cut-off events. [2021-12-21 15:17:10,051 INFO L130 PetriNetUnfolder]: For 1015/1145 co-relation queries the response was YES. [2021-12-21 15:17:10,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5342 conditions, 2563 events. 573/2563 cut-off events. For 1015/1145 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 23934 event pairs, 122 based on Foata normal form. 56/2500 useless extension candidates. Maximal degree in co-relation 4382. Up to 318 conditions per place. [2021-12-21 15:17:10,069 INFO L132 encePairwiseOnDemand]: 110/124 looper letters, 61 selfloop transitions, 21 changer transitions 0/178 dead transitions. [2021-12-21 15:17:10,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 178 transitions, 780 flow [2021-12-21 15:17:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:10,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 556 transitions. [2021-12-21 15:17:10,071 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.896774193548387 [2021-12-21 15:17:10,071 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 556 transitions. [2021-12-21 15:17:10,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 556 transitions. [2021-12-21 15:17:10,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:10,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 556 transitions. [2021-12-21 15:17:10,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:10,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:10,073 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:10,073 INFO L186 Difference]: Start difference. First operand has 124 places, 127 transitions, 397 flow. Second operand 5 states and 556 transitions. [2021-12-21 15:17:10,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 178 transitions, 780 flow [2021-12-21 15:17:10,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 178 transitions, 780 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:10,085 INFO L242 Difference]: Finished difference. Result has 132 places, 145 transitions, 605 flow [2021-12-21 15:17:10,085 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=605, PETRI_PLACES=132, PETRI_TRANSITIONS=145} [2021-12-21 15:17:10,086 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 20 predicate places. [2021-12-21 15:17:10,086 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 145 transitions, 605 flow [2021-12-21 15:17:10,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:10,086 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:10,086 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:10,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:17:10,086 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash -613223827, now seen corresponding path program 1 times [2021-12-21 15:17:10,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:10,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104958833] [2021-12-21 15:17:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:10,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:10,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:10,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104958833] [2021-12-21 15:17:10,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104958833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:10,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:10,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:10,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453583139] [2021-12-21 15:17:10,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:10,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:10,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:10,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:10,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:10,206 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:10,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 145 transitions, 605 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:10,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:10,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:10,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:10,740 INFO L129 PetriNetUnfolder]: 687/3225 cut-off events. [2021-12-21 15:17:10,740 INFO L130 PetriNetUnfolder]: For 3036/3173 co-relation queries the response was YES. [2021-12-21 15:17:10,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7285 conditions, 3225 events. 687/3225 cut-off events. For 3036/3173 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31981 event pairs, 123 based on Foata normal form. 69/3145 useless extension candidates. Maximal degree in co-relation 6118. Up to 349 conditions per place. [2021-12-21 15:17:10,764 INFO L132 encePairwiseOnDemand]: 110/124 looper letters, 111 selfloop transitions, 40 changer transitions 9/252 dead transitions. [2021-12-21 15:17:10,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 252 transitions, 1598 flow [2021-12-21 15:17:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:17:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:17:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 772 transitions. [2021-12-21 15:17:10,766 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8894009216589862 [2021-12-21 15:17:10,766 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 772 transitions. [2021-12-21 15:17:10,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 772 transitions. [2021-12-21 15:17:10,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:10,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 772 transitions. [2021-12-21 15:17:10,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:10,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:10,769 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:10,769 INFO L186 Difference]: Start difference. First operand has 132 places, 145 transitions, 605 flow. Second operand 7 states and 772 transitions. [2021-12-21 15:17:10,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 252 transitions, 1598 flow [2021-12-21 15:17:10,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 252 transitions, 1598 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:10,783 INFO L242 Difference]: Finished difference. Result has 144 places, 180 transitions, 1093 flow [2021-12-21 15:17:10,783 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1093, PETRI_PLACES=144, PETRI_TRANSITIONS=180} [2021-12-21 15:17:10,784 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 32 predicate places. [2021-12-21 15:17:10,784 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 180 transitions, 1093 flow [2021-12-21 15:17:10,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:10,784 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:10,784 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:10,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:17:10,785 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash -148648603, now seen corresponding path program 1 times [2021-12-21 15:17:10,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:10,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977231900] [2021-12-21 15:17:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:10,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:10,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:10,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977231900] [2021-12-21 15:17:10,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977231900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:10,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:10,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:10,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554538594] [2021-12-21 15:17:10,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:10,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:10,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:10,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:10,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:10,940 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:10,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 180 transitions, 1093 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:10,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:10,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:10,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:11,443 INFO L129 PetriNetUnfolder]: 636/3554 cut-off events. [2021-12-21 15:17:11,443 INFO L130 PetriNetUnfolder]: For 5898/6021 co-relation queries the response was YES. [2021-12-21 15:17:11,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8635 conditions, 3554 events. 636/3554 cut-off events. For 5898/6021 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 36941 event pairs, 125 based on Foata normal form. 72/3466 useless extension candidates. Maximal degree in co-relation 7511. Up to 334 conditions per place. [2021-12-21 15:17:11,473 INFO L132 encePairwiseOnDemand]: 110/124 looper letters, 116 selfloop transitions, 65 changer transitions 9/282 dead transitions. [2021-12-21 15:17:11,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 282 transitions, 2376 flow [2021-12-21 15:17:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:17:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:17:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 772 transitions. [2021-12-21 15:17:11,475 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8894009216589862 [2021-12-21 15:17:11,475 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 772 transitions. [2021-12-21 15:17:11,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 772 transitions. [2021-12-21 15:17:11,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:11,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 772 transitions. [2021-12-21 15:17:11,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:11,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:11,478 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:11,478 INFO L186 Difference]: Start difference. First operand has 144 places, 180 transitions, 1093 flow. Second operand 7 states and 772 transitions. [2021-12-21 15:17:11,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 282 transitions, 2376 flow [2021-12-21 15:17:11,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 282 transitions, 2368 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:11,494 INFO L242 Difference]: Finished difference. Result has 154 places, 220 transitions, 1867 flow [2021-12-21 15:17:11,494 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1867, PETRI_PLACES=154, PETRI_TRANSITIONS=220} [2021-12-21 15:17:11,495 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 42 predicate places. [2021-12-21 15:17:11,495 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 220 transitions, 1867 flow [2021-12-21 15:17:11,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:11,495 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:11,496 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:11,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:17:11,496 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1601579601, now seen corresponding path program 3 times [2021-12-21 15:17:11,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:11,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027440685] [2021-12-21 15:17:11,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:11,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:11,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:11,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027440685] [2021-12-21 15:17:11,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027440685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:11,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:11,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:11,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651507438] [2021-12-21 15:17:11,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:11,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:11,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:11,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:11,663 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:11,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 220 transitions, 1867 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:11,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:11,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:11,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:12,244 INFO L129 PetriNetUnfolder]: 681/4157 cut-off events. [2021-12-21 15:17:12,244 INFO L130 PetriNetUnfolder]: For 8977/9112 co-relation queries the response was YES. [2021-12-21 15:17:12,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10400 conditions, 4157 events. 681/4157 cut-off events. For 8977/9112 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 45547 event pairs, 168 based on Foata normal form. 54/4032 useless extension candidates. Maximal degree in co-relation 8936. Up to 429 conditions per place. [2021-12-21 15:17:12,274 INFO L132 encePairwiseOnDemand]: 113/124 looper letters, 155 selfloop transitions, 53 changer transitions 7/307 dead transitions. [2021-12-21 15:17:12,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 307 transitions, 3175 flow [2021-12-21 15:17:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:17:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:17:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 769 transitions. [2021-12-21 15:17:12,276 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8859447004608295 [2021-12-21 15:17:12,276 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 769 transitions. [2021-12-21 15:17:12,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 769 transitions. [2021-12-21 15:17:12,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:12,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 769 transitions. [2021-12-21 15:17:12,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.85714285714286) internal successors, (769), 7 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:12,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:12,280 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:12,280 INFO L186 Difference]: Start difference. First operand has 154 places, 220 transitions, 1867 flow. Second operand 7 states and 769 transitions. [2021-12-21 15:17:12,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 307 transitions, 3175 flow [2021-12-21 15:17:12,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 307 transitions, 3141 flow, removed 17 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:12,302 INFO L242 Difference]: Finished difference. Result has 166 places, 242 transitions, 2381 flow [2021-12-21 15:17:12,303 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1777, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2381, PETRI_PLACES=166, PETRI_TRANSITIONS=242} [2021-12-21 15:17:12,303 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 54 predicate places. [2021-12-21 15:17:12,303 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 242 transitions, 2381 flow [2021-12-21 15:17:12,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:12,304 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:12,304 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:12,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 15:17:12,304 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:12,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1952870271, now seen corresponding path program 1 times [2021-12-21 15:17:12,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:12,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818854642] [2021-12-21 15:17:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:12,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:12,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:12,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818854642] [2021-12-21 15:17:12,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818854642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:12,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:12,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:12,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158733625] [2021-12-21 15:17:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:12,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:12,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:12,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:12,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 242 transitions, 2381 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:12,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:12,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:12,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:13,105 INFO L129 PetriNetUnfolder]: 726/4918 cut-off events. [2021-12-21 15:17:13,106 INFO L130 PetriNetUnfolder]: For 12079/12261 co-relation queries the response was YES. [2021-12-21 15:17:13,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12376 conditions, 4918 events. 726/4918 cut-off events. For 12079/12261 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 56456 event pairs, 190 based on Foata normal form. 65/4775 useless extension candidates. Maximal degree in co-relation 10686. Up to 524 conditions per place. [2021-12-21 15:17:13,143 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 164 selfloop transitions, 72 changer transitions 6/334 dead transitions. [2021-12-21 15:17:13,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 334 transitions, 3957 flow [2021-12-21 15:17:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:17:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:17:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 769 transitions. [2021-12-21 15:17:13,146 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8859447004608295 [2021-12-21 15:17:13,146 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 769 transitions. [2021-12-21 15:17:13,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 769 transitions. [2021-12-21 15:17:13,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:13,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 769 transitions. [2021-12-21 15:17:13,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.85714285714286) internal successors, (769), 7 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:13,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:13,151 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:13,151 INFO L186 Difference]: Start difference. First operand has 166 places, 242 transitions, 2381 flow. Second operand 7 states and 769 transitions. [2021-12-21 15:17:13,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 334 transitions, 3957 flow [2021-12-21 15:17:13,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 334 transitions, 3947 flow, removed 5 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:13,192 INFO L242 Difference]: Finished difference. Result has 178 places, 271 transitions, 3195 flow [2021-12-21 15:17:13,193 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3195, PETRI_PLACES=178, PETRI_TRANSITIONS=271} [2021-12-21 15:17:13,193 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 66 predicate places. [2021-12-21 15:17:13,194 INFO L470 AbstractCegarLoop]: Abstraction has has 178 places, 271 transitions, 3195 flow [2021-12-21 15:17:13,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:13,194 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:13,194 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:13,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 15:17:13,194 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:13,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:13,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1617352099, now seen corresponding path program 4 times [2021-12-21 15:17:13,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:13,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726072244] [2021-12-21 15:17:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:13,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:13,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:13,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726072244] [2021-12-21 15:17:13,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726072244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:13,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:13,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:13,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685098096] [2021-12-21 15:17:13,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:13,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:13,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:13,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:13,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:13,276 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:13,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 271 transitions, 3195 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:13,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:13,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:13,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:13,939 INFO L129 PetriNetUnfolder]: 706/4745 cut-off events. [2021-12-21 15:17:13,939 INFO L130 PetriNetUnfolder]: For 15772/15950 co-relation queries the response was YES. [2021-12-21 15:17:13,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12741 conditions, 4745 events. 706/4745 cut-off events. For 15772/15950 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 54166 event pairs, 186 based on Foata normal form. 61/4598 useless extension candidates. Maximal degree in co-relation 11065. Up to 512 conditions per place. [2021-12-21 15:17:13,988 INFO L132 encePairwiseOnDemand]: 110/124 looper letters, 145 selfloop transitions, 67 changer transitions 16/320 dead transitions. [2021-12-21 15:17:13,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 320 transitions, 4223 flow [2021-12-21 15:17:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:13,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2021-12-21 15:17:13,990 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8951612903225806 [2021-12-21 15:17:13,991 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2021-12-21 15:17:13,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2021-12-21 15:17:13,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:13,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2021-12-21 15:17:13,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:13,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:13,994 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:13,994 INFO L186 Difference]: Start difference. First operand has 178 places, 271 transitions, 3195 flow. Second operand 5 states and 555 transitions. [2021-12-21 15:17:13,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 320 transitions, 4223 flow [2021-12-21 15:17:14,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 320 transitions, 4203 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:14,055 INFO L242 Difference]: Finished difference. Result has 185 places, 277 transitions, 3569 flow [2021-12-21 15:17:14,055 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=3131, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3569, PETRI_PLACES=185, PETRI_TRANSITIONS=277} [2021-12-21 15:17:14,057 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 73 predicate places. [2021-12-21 15:17:14,058 INFO L470 AbstractCegarLoop]: Abstraction has has 185 places, 277 transitions, 3569 flow [2021-12-21 15:17:14,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:14,058 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:14,058 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:14,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 15:17:14,059 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:14,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1485326517, now seen corresponding path program 2 times [2021-12-21 15:17:14,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:14,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095952386] [2021-12-21 15:17:14,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:14,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:14,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:14,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095952386] [2021-12-21 15:17:14,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095952386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:14,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:14,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:14,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241624087] [2021-12-21 15:17:14,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:14,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:14,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:14,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:14,114 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:14,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 277 transitions, 3569 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:14,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:14,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:14,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:14,615 INFO L129 PetriNetUnfolder]: 661/4490 cut-off events. [2021-12-21 15:17:14,615 INFO L130 PetriNetUnfolder]: For 18051/18207 co-relation queries the response was YES. [2021-12-21 15:17:14,641 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12338 conditions, 4490 events. 661/4490 cut-off events. For 18051/18207 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 50698 event pairs, 165 based on Foata normal form. 62/4359 useless extension candidates. Maximal degree in co-relation 10657. Up to 478 conditions per place. [2021-12-21 15:17:14,654 INFO L132 encePairwiseOnDemand]: 109/124 looper letters, 163 selfloop transitions, 51 changer transitions 14/320 dead transitions. [2021-12-21 15:17:14,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 320 transitions, 4418 flow [2021-12-21 15:17:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2021-12-21 15:17:14,656 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8951612903225806 [2021-12-21 15:17:14,656 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2021-12-21 15:17:14,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2021-12-21 15:17:14,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:14,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2021-12-21 15:17:14,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:14,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:14,659 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:14,659 INFO L186 Difference]: Start difference. First operand has 185 places, 277 transitions, 3569 flow. Second operand 5 states and 555 transitions. [2021-12-21 15:17:14,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 320 transitions, 4418 flow [2021-12-21 15:17:14,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 320 transitions, 4395 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:14,724 INFO L242 Difference]: Finished difference. Result has 191 places, 278 transitions, 3710 flow [2021-12-21 15:17:14,724 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3710, PETRI_PLACES=191, PETRI_TRANSITIONS=278} [2021-12-21 15:17:14,725 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 79 predicate places. [2021-12-21 15:17:14,725 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 278 transitions, 3710 flow [2021-12-21 15:17:14,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:14,725 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:14,726 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:14,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 15:17:14,726 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1641429269, now seen corresponding path program 2 times [2021-12-21 15:17:14,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:14,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685577119] [2021-12-21 15:17:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:14,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:14,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:14,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685577119] [2021-12-21 15:17:14,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685577119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:14,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:14,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:14,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204113077] [2021-12-21 15:17:14,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:14,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:14,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:14,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:14,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:14,797 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:14,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 278 transitions, 3710 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:14,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:14,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:14,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:15,473 INFO L129 PetriNetUnfolder]: 726/4767 cut-off events. [2021-12-21 15:17:15,473 INFO L130 PetriNetUnfolder]: For 21113/21279 co-relation queries the response was YES. [2021-12-21 15:17:15,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13801 conditions, 4767 events. 726/4767 cut-off events. For 21113/21279 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 54200 event pairs, 189 based on Foata normal form. 43/4594 useless extension candidates. Maximal degree in co-relation 11975. Up to 523 conditions per place. [2021-12-21 15:17:15,505 INFO L132 encePairwiseOnDemand]: 113/124 looper letters, 158 selfloop transitions, 104 changer transitions 5/359 dead transitions. [2021-12-21 15:17:15,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 359 transitions, 5455 flow [2021-12-21 15:17:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:17:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:17:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 769 transitions. [2021-12-21 15:17:15,507 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8859447004608295 [2021-12-21 15:17:15,507 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 769 transitions. [2021-12-21 15:17:15,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 769 transitions. [2021-12-21 15:17:15,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:15,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 769 transitions. [2021-12-21 15:17:15,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.85714285714286) internal successors, (769), 7 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:15,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:15,510 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:15,510 INFO L186 Difference]: Start difference. First operand has 191 places, 278 transitions, 3710 flow. Second operand 7 states and 769 transitions. [2021-12-21 15:17:15,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 359 transitions, 5455 flow [2021-12-21 15:17:15,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 359 transitions, 5453 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:15,579 INFO L242 Difference]: Finished difference. Result has 202 places, 311 transitions, 4852 flow [2021-12-21 15:17:15,581 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=3708, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4852, PETRI_PLACES=202, PETRI_TRANSITIONS=311} [2021-12-21 15:17:15,582 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 90 predicate places. [2021-12-21 15:17:15,582 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 311 transitions, 4852 flow [2021-12-21 15:17:15,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:15,583 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:15,583 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:15,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 15:17:15,583 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:15,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:15,584 INFO L85 PathProgramCache]: Analyzing trace with hash -519905703, now seen corresponding path program 2 times [2021-12-21 15:17:15,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:15,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383723866] [2021-12-21 15:17:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:15,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:15,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:15,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383723866] [2021-12-21 15:17:15,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383723866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:15,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:15,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:15,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662495931] [2021-12-21 15:17:15,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:15,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:15,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:15,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:15,662 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:15,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 311 transitions, 4852 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:15,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:15,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:15,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:16,281 INFO L129 PetriNetUnfolder]: 718/4919 cut-off events. [2021-12-21 15:17:16,281 INFO L130 PetriNetUnfolder]: For 25639/25816 co-relation queries the response was YES. [2021-12-21 15:17:16,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14454 conditions, 4919 events. 718/4919 cut-off events. For 25639/25816 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 56844 event pairs, 214 based on Foata normal form. 48/4746 useless extension candidates. Maximal degree in co-relation 12434. Up to 532 conditions per place. [2021-12-21 15:17:16,329 INFO L132 encePairwiseOnDemand]: 112/124 looper letters, 188 selfloop transitions, 75 changer transitions 6/361 dead transitions. [2021-12-21 15:17:16,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 361 transitions, 5912 flow [2021-12-21 15:17:16,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:17:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:17:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 763 transitions. [2021-12-21 15:17:16,331 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8790322580645161 [2021-12-21 15:17:16,331 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 763 transitions. [2021-12-21 15:17:16,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 763 transitions. [2021-12-21 15:17:16,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:16,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 763 transitions. [2021-12-21 15:17:16,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:16,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:16,334 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:16,334 INFO L186 Difference]: Start difference. First operand has 202 places, 311 transitions, 4852 flow. Second operand 7 states and 763 transitions. [2021-12-21 15:17:16,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 361 transitions, 5912 flow [2021-12-21 15:17:16,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 361 transitions, 5848 flow, removed 32 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:16,434 INFO L242 Difference]: Finished difference. Result has 211 places, 317 transitions, 5119 flow [2021-12-21 15:17:16,435 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=4736, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5119, PETRI_PLACES=211, PETRI_TRANSITIONS=317} [2021-12-21 15:17:16,435 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 99 predicate places. [2021-12-21 15:17:16,435 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 317 transitions, 5119 flow [2021-12-21 15:17:16,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:16,436 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:16,436 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:16,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 15:17:16,436 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:16,437 INFO L85 PathProgramCache]: Analyzing trace with hash -878726137, now seen corresponding path program 3 times [2021-12-21 15:17:16,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:16,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066377885] [2021-12-21 15:17:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:16,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:16,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:16,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066377885] [2021-12-21 15:17:16,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066377885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:16,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:16,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:16,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663446978] [2021-12-21 15:17:16,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:16,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:16,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:16,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:16,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:16,536 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:16,536 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 317 transitions, 5119 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:16,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:16,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:16,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:17,194 INFO L129 PetriNetUnfolder]: 717/5058 cut-off events. [2021-12-21 15:17:17,195 INFO L130 PetriNetUnfolder]: For 26915/27078 co-relation queries the response was YES. [2021-12-21 15:17:17,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14919 conditions, 5058 events. 717/5058 cut-off events. For 26915/27078 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 59286 event pairs, 206 based on Foata normal form. 45/4886 useless extension candidates. Maximal degree in co-relation 12959. Up to 506 conditions per place. [2021-12-21 15:17:17,240 INFO L132 encePairwiseOnDemand]: 112/124 looper letters, 196 selfloop transitions, 86 changer transitions 9/383 dead transitions. [2021-12-21 15:17:17,241 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 383 transitions, 6537 flow [2021-12-21 15:17:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:17:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:17:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 768 transitions. [2021-12-21 15:17:17,242 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8847926267281107 [2021-12-21 15:17:17,242 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 768 transitions. [2021-12-21 15:17:17,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 768 transitions. [2021-12-21 15:17:17,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:17,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 768 transitions. [2021-12-21 15:17:17,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.71428571428571) internal successors, (768), 7 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:17,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:17,245 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:17,246 INFO L186 Difference]: Start difference. First operand has 211 places, 317 transitions, 5119 flow. Second operand 7 states and 768 transitions. [2021-12-21 15:17:17,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 383 transitions, 6537 flow [2021-12-21 15:17:17,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 383 transitions, 6531 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:17,352 INFO L242 Difference]: Finished difference. Result has 221 places, 333 transitions, 5675 flow [2021-12-21 15:17:17,353 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5675, PETRI_PLACES=221, PETRI_TRANSITIONS=333} [2021-12-21 15:17:17,353 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 109 predicate places. [2021-12-21 15:17:17,353 INFO L470 AbstractCegarLoop]: Abstraction has has 221 places, 333 transitions, 5675 flow [2021-12-21 15:17:17,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:17,354 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:17,354 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:17,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 15:17:17,354 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:17,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:17,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1431994733, now seen corresponding path program 4 times [2021-12-21 15:17:17,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:17,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63772758] [2021-12-21 15:17:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:17,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:17,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:17,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63772758] [2021-12-21 15:17:17,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63772758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:17,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:17,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:17,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153931365] [2021-12-21 15:17:17,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:17,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:17,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:17,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:17,404 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:17,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 333 transitions, 5675 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:17,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:17,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:17,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:18,093 INFO L129 PetriNetUnfolder]: 730/5408 cut-off events. [2021-12-21 15:17:18,093 INFO L130 PetriNetUnfolder]: For 29357/29536 co-relation queries the response was YES. [2021-12-21 15:17:18,124 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15871 conditions, 5408 events. 730/5408 cut-off events. For 29357/29536 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 64206 event pairs, 196 based on Foata normal form. 58/5226 useless extension candidates. Maximal degree in co-relation 13778. Up to 581 conditions per place. [2021-12-21 15:17:18,139 INFO L132 encePairwiseOnDemand]: 112/124 looper letters, 197 selfloop transitions, 75 changer transitions 2/366 dead transitions. [2021-12-21 15:17:18,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 366 transitions, 6647 flow [2021-12-21 15:17:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 547 transitions. [2021-12-21 15:17:18,140 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.882258064516129 [2021-12-21 15:17:18,141 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 547 transitions. [2021-12-21 15:17:18,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 547 transitions. [2021-12-21 15:17:18,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:18,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 547 transitions. [2021-12-21 15:17:18,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.4) internal successors, (547), 5 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:18,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:18,143 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:18,143 INFO L186 Difference]: Start difference. First operand has 221 places, 333 transitions, 5675 flow. Second operand 5 states and 547 transitions. [2021-12-21 15:17:18,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 366 transitions, 6647 flow [2021-12-21 15:17:18,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 366 transitions, 6603 flow, removed 22 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:18,275 INFO L242 Difference]: Finished difference. Result has 229 places, 341 transitions, 6124 flow [2021-12-21 15:17:18,275 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6124, PETRI_PLACES=229, PETRI_TRANSITIONS=341} [2021-12-21 15:17:18,276 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 117 predicate places. [2021-12-21 15:17:18,276 INFO L470 AbstractCegarLoop]: Abstraction has has 229 places, 341 transitions, 6124 flow [2021-12-21 15:17:18,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:18,276 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:18,277 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:18,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 15:17:18,277 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:18,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1486639325, now seen corresponding path program 5 times [2021-12-21 15:17:18,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:18,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969387289] [2021-12-21 15:17:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:18,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:18,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:18,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969387289] [2021-12-21 15:17:18,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969387289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:18,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:18,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:18,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698291822] [2021-12-21 15:17:18,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:18,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:18,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:18,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:18,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:18,350 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:18,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 341 transitions, 6124 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:18,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:18,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:18,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:19,146 INFO L129 PetriNetUnfolder]: 707/5270 cut-off events. [2021-12-21 15:17:19,146 INFO L130 PetriNetUnfolder]: For 33397/33542 co-relation queries the response was YES. [2021-12-21 15:17:19,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16024 conditions, 5270 events. 707/5270 cut-off events. For 33397/33542 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 62877 event pairs, 185 based on Foata normal form. 50/5105 useless extension candidates. Maximal degree in co-relation 14056. Up to 556 conditions per place. [2021-12-21 15:17:19,194 INFO L132 encePairwiseOnDemand]: 113/124 looper letters, 191 selfloop transitions, 94 changer transitions 6/383 dead transitions. [2021-12-21 15:17:19,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 383 transitions, 7166 flow [2021-12-21 15:17:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:17:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:17:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 762 transitions. [2021-12-21 15:17:19,197 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8778801843317973 [2021-12-21 15:17:19,197 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 762 transitions. [2021-12-21 15:17:19,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 762 transitions. [2021-12-21 15:17:19,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:19,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 762 transitions. [2021-12-21 15:17:19,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.85714285714286) internal successors, (762), 7 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:19,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:19,200 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:19,200 INFO L186 Difference]: Start difference. First operand has 229 places, 341 transitions, 6124 flow. Second operand 7 states and 762 transitions. [2021-12-21 15:17:19,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 383 transitions, 7166 flow [2021-12-21 15:17:19,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 383 transitions, 7144 flow, removed 11 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:19,349 INFO L242 Difference]: Finished difference. Result has 238 places, 348 transitions, 6590 flow [2021-12-21 15:17:19,350 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=6102, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6590, PETRI_PLACES=238, PETRI_TRANSITIONS=348} [2021-12-21 15:17:19,350 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 126 predicate places. [2021-12-21 15:17:19,351 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 348 transitions, 6590 flow [2021-12-21 15:17:19,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:19,351 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:19,351 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:19,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 15:17:19,352 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:19,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1099339847, now seen corresponding path program 3 times [2021-12-21 15:17:19,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:19,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279862470] [2021-12-21 15:17:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:19,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:19,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:19,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279862470] [2021-12-21 15:17:19,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279862470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:19,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:19,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:17:19,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44462834] [2021-12-21 15:17:19,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:19,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:17:19,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:19,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:17:19,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:17:19,424 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:19,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 348 transitions, 6590 flow. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:19,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:19,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:19,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:20,232 INFO L129 PetriNetUnfolder]: 685/5239 cut-off events. [2021-12-21 15:17:20,232 INFO L130 PetriNetUnfolder]: For 35324/35534 co-relation queries the response was YES. [2021-12-21 15:17:20,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15595 conditions, 5239 events. 685/5239 cut-off events. For 35324/35534 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 62169 event pairs, 217 based on Foata normal form. 74/5074 useless extension candidates. Maximal degree in co-relation 13865. Up to 529 conditions per place. [2021-12-21 15:17:20,289 INFO L132 encePairwiseOnDemand]: 118/124 looper letters, 260 selfloop transitions, 41 changer transitions 12/405 dead transitions. [2021-12-21 15:17:20,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 405 transitions, 8268 flow [2021-12-21 15:17:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:17:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:17:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 443 transitions. [2021-12-21 15:17:20,291 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8931451612903226 [2021-12-21 15:17:20,291 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 443 transitions. [2021-12-21 15:17:20,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 443 transitions. [2021-12-21 15:17:20,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:20,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 443 transitions. [2021-12-21 15:17:20,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:20,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:20,294 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:20,294 INFO L186 Difference]: Start difference. First operand has 238 places, 348 transitions, 6590 flow. Second operand 4 states and 443 transitions. [2021-12-21 15:17:20,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 405 transitions, 8268 flow [2021-12-21 15:17:20,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 405 transitions, 8126 flow, removed 22 selfloop flow, removed 3 redundant places. [2021-12-21 15:17:20,466 INFO L242 Difference]: Finished difference. Result has 241 places, 348 transitions, 6489 flow [2021-12-21 15:17:20,466 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=6212, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6489, PETRI_PLACES=241, PETRI_TRANSITIONS=348} [2021-12-21 15:17:20,467 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 129 predicate places. [2021-12-21 15:17:20,467 INFO L470 AbstractCegarLoop]: Abstraction has has 241 places, 348 transitions, 6489 flow [2021-12-21 15:17:20,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:20,467 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:20,467 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:20,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 15:17:20,468 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1429608049, now seen corresponding path program 5 times [2021-12-21 15:17:20,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:20,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771853539] [2021-12-21 15:17:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:20,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:20,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:20,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771853539] [2021-12-21 15:17:20,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771853539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:20,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:20,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:20,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010973377] [2021-12-21 15:17:20,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:20,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:20,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:20,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:20,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:20,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:20,524 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 348 transitions, 6489 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:20,524 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:20,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:20,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:21,356 INFO L129 PetriNetUnfolder]: 685/5344 cut-off events. [2021-12-21 15:17:21,356 INFO L130 PetriNetUnfolder]: For 33347/33515 co-relation queries the response was YES. [2021-12-21 15:17:21,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15768 conditions, 5344 events. 685/5344 cut-off events. For 33347/33515 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 64162 event pairs, 203 based on Foata normal form. 59/5191 useless extension candidates. Maximal degree in co-relation 14091. Up to 588 conditions per place. [2021-12-21 15:17:21,467 INFO L132 encePairwiseOnDemand]: 113/124 looper letters, 206 selfloop transitions, 75 changer transitions 1/374 dead transitions. [2021-12-21 15:17:21,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 374 transitions, 7321 flow [2021-12-21 15:17:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:21,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 546 transitions. [2021-12-21 15:17:21,469 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8806451612903226 [2021-12-21 15:17:21,469 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 546 transitions. [2021-12-21 15:17:21,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 546 transitions. [2021-12-21 15:17:21,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:21,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 546 transitions. [2021-12-21 15:17:21,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.2) internal successors, (546), 5 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:21,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:21,471 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:21,471 INFO L186 Difference]: Start difference. First operand has 241 places, 348 transitions, 6489 flow. Second operand 5 states and 546 transitions. [2021-12-21 15:17:21,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 374 transitions, 7321 flow [2021-12-21 15:17:21,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 374 transitions, 7295 flow, removed 6 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:21,587 INFO L242 Difference]: Finished difference. Result has 246 places, 352 transitions, 6739 flow [2021-12-21 15:17:21,588 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=6463, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6739, PETRI_PLACES=246, PETRI_TRANSITIONS=352} [2021-12-21 15:17:21,588 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 134 predicate places. [2021-12-21 15:17:21,588 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 352 transitions, 6739 flow [2021-12-21 15:17:21,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:21,589 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:21,589 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:21,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 15:17:21,589 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:21,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash 24432091, now seen corresponding path program 6 times [2021-12-21 15:17:21,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:21,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163037512] [2021-12-21 15:17:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:21,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:21,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163037512] [2021-12-21 15:17:21,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163037512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:21,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:21,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:21,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051765405] [2021-12-21 15:17:21,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:21,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:21,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:21,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:21,654 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:21,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 352 transitions, 6739 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:21,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:21,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:21,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:22,393 INFO L129 PetriNetUnfolder]: 679/5351 cut-off events. [2021-12-21 15:17:22,394 INFO L130 PetriNetUnfolder]: For 35254/35448 co-relation queries the response was YES. [2021-12-21 15:17:22,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15888 conditions, 5351 events. 679/5351 cut-off events. For 35254/35448 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 64362 event pairs, 164 based on Foata normal form. 62/5201 useless extension candidates. Maximal degree in co-relation 14838. Up to 580 conditions per place. [2021-12-21 15:17:22,449 INFO L132 encePairwiseOnDemand]: 109/124 looper letters, 197 selfloop transitions, 97 changer transitions 5/391 dead transitions. [2021-12-21 15:17:22,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 391 transitions, 7739 flow [2021-12-21 15:17:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:17:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:17:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 762 transitions. [2021-12-21 15:17:22,451 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8778801843317973 [2021-12-21 15:17:22,451 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 762 transitions. [2021-12-21 15:17:22,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 762 transitions. [2021-12-21 15:17:22,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:22,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 762 transitions. [2021-12-21 15:17:22,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.85714285714286) internal successors, (762), 7 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:22,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:22,454 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:22,455 INFO L186 Difference]: Start difference. First operand has 246 places, 352 transitions, 6739 flow. Second operand 7 states and 762 transitions. [2021-12-21 15:17:22,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 391 transitions, 7739 flow [2021-12-21 15:17:22,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 391 transitions, 7623 flow, removed 5 selfloop flow, removed 2 redundant places. [2021-12-21 15:17:22,599 INFO L242 Difference]: Finished difference. Result has 255 places, 356 transitions, 7096 flow [2021-12-21 15:17:22,599 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=6595, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7096, PETRI_PLACES=255, PETRI_TRANSITIONS=356} [2021-12-21 15:17:22,599 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 143 predicate places. [2021-12-21 15:17:22,599 INFO L470 AbstractCegarLoop]: Abstraction has has 255 places, 356 transitions, 7096 flow [2021-12-21 15:17:22,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:22,600 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:22,600 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:22,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 15:17:22,600 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash -311761247, now seen corresponding path program 6 times [2021-12-21 15:17:22,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:22,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676097907] [2021-12-21 15:17:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:22,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:22,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:22,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676097907] [2021-12-21 15:17:22,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676097907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:22,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:22,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:22,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653672123] [2021-12-21 15:17:22,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:22,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:22,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:22,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:22,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:22,651 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:22,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 356 transitions, 7096 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:22,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:22,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:22,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:23,333 INFO L129 PetriNetUnfolder]: 648/5036 cut-off events. [2021-12-21 15:17:23,334 INFO L130 PetriNetUnfolder]: For 35835/36012 co-relation queries the response was YES. [2021-12-21 15:17:23,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15537 conditions, 5036 events. 648/5036 cut-off events. For 35835/36012 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 59419 event pairs, 148 based on Foata normal form. 58/4880 useless extension candidates. Maximal degree in co-relation 14602. Up to 539 conditions per place. [2021-12-21 15:17:23,385 INFO L132 encePairwiseOnDemand]: 112/124 looper letters, 197 selfloop transitions, 84 changer transitions 4/377 dead transitions. [2021-12-21 15:17:23,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 377 transitions, 7686 flow [2021-12-21 15:17:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:17:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-21 15:17:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 661 transitions. [2021-12-21 15:17:23,388 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8884408602150538 [2021-12-21 15:17:23,388 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 661 transitions. [2021-12-21 15:17:23,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 661 transitions. [2021-12-21 15:17:23,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:23,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 661 transitions. [2021-12-21 15:17:23,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 110.16666666666667) internal successors, (661), 6 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:23,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:23,392 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:23,392 INFO L186 Difference]: Start difference. First operand has 255 places, 356 transitions, 7096 flow. Second operand 6 states and 661 transitions. [2021-12-21 15:17:23,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 377 transitions, 7686 flow [2021-12-21 15:17:23,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 377 transitions, 7566 flow, removed 16 selfloop flow, removed 3 redundant places. [2021-12-21 15:17:23,551 INFO L242 Difference]: Finished difference. Result has 257 places, 348 transitions, 6886 flow [2021-12-21 15:17:23,552 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=6746, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6886, PETRI_PLACES=257, PETRI_TRANSITIONS=348} [2021-12-21 15:17:23,552 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 145 predicate places. [2021-12-21 15:17:23,552 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 348 transitions, 6886 flow [2021-12-21 15:17:23,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:23,560 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:23,560 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:23,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 15:17:23,563 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:23,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:23,564 INFO L85 PathProgramCache]: Analyzing trace with hash -787788849, now seen corresponding path program 7 times [2021-12-21 15:17:23,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:23,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091591943] [2021-12-21 15:17:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:23,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:23,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:23,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091591943] [2021-12-21 15:17:23,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091591943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:23,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:23,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:23,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914040462] [2021-12-21 15:17:23,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:23,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:23,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:23,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:23,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:23,608 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:23,608 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 348 transitions, 6886 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:23,608 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:23,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:23,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:24,230 INFO L129 PetriNetUnfolder]: 612/4777 cut-off events. [2021-12-21 15:17:24,231 INFO L130 PetriNetUnfolder]: For 33927/34094 co-relation queries the response was YES. [2021-12-21 15:17:24,269 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15017 conditions, 4777 events. 612/4777 cut-off events. For 33927/34094 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 55942 event pairs, 146 based on Foata normal form. 54/4628 useless extension candidates. Maximal degree in co-relation 14081. Up to 485 conditions per place. [2021-12-21 15:17:24,280 INFO L132 encePairwiseOnDemand]: 116/124 looper letters, 211 selfloop transitions, 64 changer transitions 1/368 dead transitions. [2021-12-21 15:17:24,280 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 368 transitions, 7579 flow [2021-12-21 15:17:24,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 544 transitions. [2021-12-21 15:17:24,282 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8774193548387097 [2021-12-21 15:17:24,282 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 544 transitions. [2021-12-21 15:17:24,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 544 transitions. [2021-12-21 15:17:24,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:24,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 544 transitions. [2021-12-21 15:17:24,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.8) internal successors, (544), 5 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:24,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:24,284 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:24,284 INFO L186 Difference]: Start difference. First operand has 257 places, 348 transitions, 6886 flow. Second operand 5 states and 544 transitions. [2021-12-21 15:17:24,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 368 transitions, 7579 flow [2021-12-21 15:17:24,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 368 transitions, 7400 flow, removed 29 selfloop flow, removed 5 redundant places. [2021-12-21 15:17:24,435 INFO L242 Difference]: Finished difference. Result has 257 places, 346 transitions, 6805 flow [2021-12-21 15:17:24,436 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=6639, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6805, PETRI_PLACES=257, PETRI_TRANSITIONS=346} [2021-12-21 15:17:24,436 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 145 predicate places. [2021-12-21 15:17:24,436 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 346 transitions, 6805 flow [2021-12-21 15:17:24,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:24,437 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:24,437 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:24,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 15:17:24,437 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:24,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:24,437 INFO L85 PathProgramCache]: Analyzing trace with hash 745881139, now seen corresponding path program 8 times [2021-12-21 15:17:24,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:24,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567532968] [2021-12-21 15:17:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:24,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:24,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:24,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567532968] [2021-12-21 15:17:24,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567532968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:24,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:24,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:24,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760427316] [2021-12-21 15:17:24,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:24,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:24,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:24,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:24,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:24,503 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:24,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 346 transitions, 6805 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:24,504 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:24,504 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:24,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:25,170 INFO L129 PetriNetUnfolder]: 648/5035 cut-off events. [2021-12-21 15:17:25,170 INFO L130 PetriNetUnfolder]: For 35410/35593 co-relation queries the response was YES. [2021-12-21 15:17:25,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15872 conditions, 5035 events. 648/5035 cut-off events. For 35410/35593 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 59718 event pairs, 164 based on Foata normal form. 54/4871 useless extension candidates. Maximal degree in co-relation 14947. Up to 510 conditions per place. [2021-12-21 15:17:25,226 INFO L132 encePairwiseOnDemand]: 115/124 looper letters, 206 selfloop transitions, 87 changer transitions 0/385 dead transitions. [2021-12-21 15:17:25,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 385 transitions, 8111 flow [2021-12-21 15:17:25,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:25,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 548 transitions. [2021-12-21 15:17:25,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8838709677419355 [2021-12-21 15:17:25,229 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 548 transitions. [2021-12-21 15:17:25,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 548 transitions. [2021-12-21 15:17:25,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:25,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 548 transitions. [2021-12-21 15:17:25,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:25,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:25,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:25,231 INFO L186 Difference]: Start difference. First operand has 257 places, 346 transitions, 6805 flow. Second operand 5 states and 548 transitions. [2021-12-21 15:17:25,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 385 transitions, 8111 flow [2021-12-21 15:17:25,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 385 transitions, 7976 flow, removed 8 selfloop flow, removed 3 redundant places. [2021-12-21 15:17:25,402 INFO L242 Difference]: Finished difference. Result has 261 places, 361 transitions, 7423 flow [2021-12-21 15:17:25,402 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=6677, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7423, PETRI_PLACES=261, PETRI_TRANSITIONS=361} [2021-12-21 15:17:25,403 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 149 predicate places. [2021-12-21 15:17:25,403 INFO L470 AbstractCegarLoop]: Abstraction has has 261 places, 361 transitions, 7423 flow [2021-12-21 15:17:25,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:25,403 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:25,403 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:25,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 15:17:25,403 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:25,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:25,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1821057965, now seen corresponding path program 9 times [2021-12-21 15:17:25,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:25,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991894252] [2021-12-21 15:17:25,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:25,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:25,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:25,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991894252] [2021-12-21 15:17:25,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991894252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:25,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:25,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:25,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80917958] [2021-12-21 15:17:25,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:25,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:25,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:25,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:25,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:25,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:25,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 361 transitions, 7423 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:25,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:25,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:25,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:26,176 INFO L129 PetriNetUnfolder]: 660/5128 cut-off events. [2021-12-21 15:17:26,176 INFO L130 PetriNetUnfolder]: For 40522/40710 co-relation queries the response was YES. [2021-12-21 15:17:26,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16151 conditions, 5128 events. 660/5128 cut-off events. For 40522/40710 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 61162 event pairs, 201 based on Foata normal form. 56/4970 useless extension candidates. Maximal degree in co-relation 15232. Up to 524 conditions per place. [2021-12-21 15:17:26,217 INFO L132 encePairwiseOnDemand]: 115/124 looper letters, 212 selfloop transitions, 78 changer transitions 0/382 dead transitions. [2021-12-21 15:17:26,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 382 transitions, 8222 flow [2021-12-21 15:17:26,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 545 transitions. [2021-12-21 15:17:26,218 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8790322580645161 [2021-12-21 15:17:26,218 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 545 transitions. [2021-12-21 15:17:26,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 545 transitions. [2021-12-21 15:17:26,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:26,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 545 transitions. [2021-12-21 15:17:26,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,220 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,220 INFO L186 Difference]: Start difference. First operand has 261 places, 361 transitions, 7423 flow. Second operand 5 states and 545 transitions. [2021-12-21 15:17:26,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 382 transitions, 8222 flow [2021-12-21 15:17:26,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 382 transitions, 8164 flow, removed 12 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:26,370 INFO L242 Difference]: Finished difference. Result has 265 places, 363 transitions, 7635 flow [2021-12-21 15:17:26,370 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=7289, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7635, PETRI_PLACES=265, PETRI_TRANSITIONS=363} [2021-12-21 15:17:26,370 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 153 predicate places. [2021-12-21 15:17:26,370 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 363 transitions, 7635 flow [2021-12-21 15:17:26,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,371 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:26,371 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:26,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 15:17:26,371 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash -611779683, now seen corresponding path program 7 times [2021-12-21 15:17:26,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:26,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776118350] [2021-12-21 15:17:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:26,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:26,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:26,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776118350] [2021-12-21 15:17:26,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776118350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:26,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:26,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:26,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532924133] [2021-12-21 15:17:26,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:26,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:26,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:26,426 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:26,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 363 transitions, 7635 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:26,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:26,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:27,161 INFO L129 PetriNetUnfolder]: 714/5464 cut-off events. [2021-12-21 15:17:27,162 INFO L130 PetriNetUnfolder]: For 43137/43348 co-relation queries the response was YES. [2021-12-21 15:17:27,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17146 conditions, 5464 events. 714/5464 cut-off events. For 43137/43348 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 65767 event pairs, 191 based on Foata normal form. 68/5318 useless extension candidates. Maximal degree in co-relation 16042. Up to 593 conditions per place. [2021-12-21 15:17:27,222 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 207 selfloop transitions, 83 changer transitions 7/389 dead transitions. [2021-12-21 15:17:27,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 389 transitions, 8607 flow [2021-12-21 15:17:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 548 transitions. [2021-12-21 15:17:27,223 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8838709677419355 [2021-12-21 15:17:27,223 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 548 transitions. [2021-12-21 15:17:27,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 548 transitions. [2021-12-21 15:17:27,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:27,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 548 transitions. [2021-12-21 15:17:27,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,226 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,226 INFO L186 Difference]: Start difference. First operand has 265 places, 363 transitions, 7635 flow. Second operand 5 states and 548 transitions. [2021-12-21 15:17:27,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 389 transitions, 8607 flow [2021-12-21 15:17:27,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 389 transitions, 8506 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-12-21 15:17:27,416 INFO L242 Difference]: Finished difference. Result has 270 places, 365 transitions, 7874 flow [2021-12-21 15:17:27,416 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=7492, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7874, PETRI_PLACES=270, PETRI_TRANSITIONS=365} [2021-12-21 15:17:27,416 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 158 predicate places. [2021-12-21 15:17:27,416 INFO L470 AbstractCegarLoop]: Abstraction has has 270 places, 365 transitions, 7874 flow [2021-12-21 15:17:27,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,416 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:27,417 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:27,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 15:17:27,417 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:27,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1746066995, now seen corresponding path program 8 times [2021-12-21 15:17:27,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:27,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918340931] [2021-12-21 15:17:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:27,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:27,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:27,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918340931] [2021-12-21 15:17:27,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918340931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:27,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:27,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:27,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051783968] [2021-12-21 15:17:27,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:27,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:27,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:27,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:27,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:27,480 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:27,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 365 transitions, 7874 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:27,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:27,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:28,222 INFO L129 PetriNetUnfolder]: 677/5138 cut-off events. [2021-12-21 15:17:28,223 INFO L130 PetriNetUnfolder]: For 42257/42448 co-relation queries the response was YES. [2021-12-21 15:17:28,253 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16655 conditions, 5138 events. 677/5138 cut-off events. For 42257/42448 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 61082 event pairs, 181 based on Foata normal form. 54/4961 useless extension candidates. Maximal degree in co-relation 15533. Up to 531 conditions per place. [2021-12-21 15:17:28,265 INFO L132 encePairwiseOnDemand]: 112/124 looper letters, 208 selfloop transitions, 81 changer transitions 1/382 dead transitions. [2021-12-21 15:17:28,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 382 transitions, 8554 flow [2021-12-21 15:17:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:28,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:28,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 548 transitions. [2021-12-21 15:17:28,266 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8838709677419355 [2021-12-21 15:17:28,266 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 548 transitions. [2021-12-21 15:17:28,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 548 transitions. [2021-12-21 15:17:28,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:28,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 548 transitions. [2021-12-21 15:17:28,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,268 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,268 INFO L186 Difference]: Start difference. First operand has 270 places, 365 transitions, 7874 flow. Second operand 5 states and 548 transitions. [2021-12-21 15:17:28,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 382 transitions, 8554 flow [2021-12-21 15:17:28,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 382 transitions, 8515 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:28,457 INFO L242 Difference]: Finished difference. Result has 273 places, 363 transitions, 7910 flow [2021-12-21 15:17:28,458 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=7792, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7910, PETRI_PLACES=273, PETRI_TRANSITIONS=363} [2021-12-21 15:17:28,458 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 161 predicate places. [2021-12-21 15:17:28,458 INFO L470 AbstractCegarLoop]: Abstraction has has 273 places, 363 transitions, 7910 flow [2021-12-21 15:17:28,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,458 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:28,458 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:28,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 15:17:28,459 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:28,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:28,459 INFO L85 PathProgramCache]: Analyzing trace with hash -151886183, now seen corresponding path program 3 times [2021-12-21 15:17:28,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:28,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523537310] [2021-12-21 15:17:28,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:28,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:28,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:28,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523537310] [2021-12-21 15:17:28,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523537310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:28,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:28,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:28,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912857768] [2021-12-21 15:17:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:28,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:28,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:28,538 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:28,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 363 transitions, 7910 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:28,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:28,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:29,348 INFO L129 PetriNetUnfolder]: 724/5576 cut-off events. [2021-12-21 15:17:29,349 INFO L130 PetriNetUnfolder]: For 43940/44154 co-relation queries the response was YES. [2021-12-21 15:17:29,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17948 conditions, 5576 events. 724/5576 cut-off events. For 43940/44154 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 67317 event pairs, 188 based on Foata normal form. 62/5413 useless extension candidates. Maximal degree in co-relation 16811. Up to 596 conditions per place. [2021-12-21 15:17:29,414 INFO L132 encePairwiseOnDemand]: 112/124 looper letters, 229 selfloop transitions, 84 changer transitions 3/408 dead transitions. [2021-12-21 15:17:29,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 408 transitions, 9297 flow [2021-12-21 15:17:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:17:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-21 15:17:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 657 transitions. [2021-12-21 15:17:29,416 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8830645161290323 [2021-12-21 15:17:29,416 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 657 transitions. [2021-12-21 15:17:29,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 657 transitions. [2021-12-21 15:17:29,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:29,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 657 transitions. [2021-12-21 15:17:29,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.5) internal successors, (657), 6 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,418 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,418 INFO L186 Difference]: Start difference. First operand has 273 places, 363 transitions, 7910 flow. Second operand 6 states and 657 transitions. [2021-12-21 15:17:29,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 408 transitions, 9297 flow [2021-12-21 15:17:29,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 408 transitions, 9147 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-12-21 15:17:29,666 INFO L242 Difference]: Finished difference. Result has 279 places, 378 transitions, 8454 flow [2021-12-21 15:17:29,666 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=7768, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8454, PETRI_PLACES=279, PETRI_TRANSITIONS=378} [2021-12-21 15:17:29,667 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 167 predicate places. [2021-12-21 15:17:29,667 INFO L470 AbstractCegarLoop]: Abstraction has has 279 places, 378 transitions, 8454 flow [2021-12-21 15:17:29,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,667 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:29,667 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:29,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 15:17:29,668 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:29,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1123016729, now seen corresponding path program 4 times [2021-12-21 15:17:29,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:29,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443019115] [2021-12-21 15:17:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:29,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:29,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:29,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443019115] [2021-12-21 15:17:29,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443019115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:29,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:29,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:29,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444536824] [2021-12-21 15:17:29,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:29,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:29,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:29,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:29,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:29,734 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:29,734 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 378 transitions, 8454 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,734 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:29,734 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:29,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:30,670 INFO L129 PetriNetUnfolder]: 768/5979 cut-off events. [2021-12-21 15:17:30,671 INFO L130 PetriNetUnfolder]: For 46746/47007 co-relation queries the response was YES. [2021-12-21 15:17:30,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18854 conditions, 5979 events. 768/5979 cut-off events. For 46746/47007 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 73077 event pairs, 206 based on Foata normal form. 72/5809 useless extension candidates. Maximal degree in co-relation 17671. Up to 639 conditions per place. [2021-12-21 15:17:30,729 INFO L132 encePairwiseOnDemand]: 114/124 looper letters, 235 selfloop transitions, 89 changer transitions 3/419 dead transitions. [2021-12-21 15:17:30,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 419 transitions, 9735 flow [2021-12-21 15:17:30,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:17:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-21 15:17:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 658 transitions. [2021-12-21 15:17:30,730 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8844086021505376 [2021-12-21 15:17:30,730 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 658 transitions. [2021-12-21 15:17:30,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 658 transitions. [2021-12-21 15:17:30,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:30,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 658 transitions. [2021-12-21 15:17:30,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.66666666666667) internal successors, (658), 6 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,732 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,732 INFO L186 Difference]: Start difference. First operand has 279 places, 378 transitions, 8454 flow. Second operand 6 states and 658 transitions. [2021-12-21 15:17:30,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 419 transitions, 9735 flow [2021-12-21 15:17:30,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 419 transitions, 9671 flow, removed 8 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:30,995 INFO L242 Difference]: Finished difference. Result has 286 places, 390 transitions, 8964 flow [2021-12-21 15:17:30,995 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=8369, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8964, PETRI_PLACES=286, PETRI_TRANSITIONS=390} [2021-12-21 15:17:30,996 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 174 predicate places. [2021-12-21 15:17:30,996 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 390 transitions, 8964 flow [2021-12-21 15:17:30,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,996 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:30,996 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:30,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 15:17:30,997 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1826253479, now seen corresponding path program 5 times [2021-12-21 15:17:30,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:30,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205017843] [2021-12-21 15:17:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:30,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:31,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:31,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205017843] [2021-12-21 15:17:31,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205017843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:31,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:31,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:31,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550856509] [2021-12-21 15:17:31,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:31,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:31,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:31,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:31,085 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:31,086 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 390 transitions, 8964 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:31,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:31,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:32,091 INFO L129 PetriNetUnfolder]: 767/6094 cut-off events. [2021-12-21 15:17:32,091 INFO L130 PetriNetUnfolder]: For 49310/49578 co-relation queries the response was YES. [2021-12-21 15:17:32,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19264 conditions, 6094 events. 767/6094 cut-off events. For 49310/49578 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 75184 event pairs, 249 based on Foata normal form. 71/5911 useless extension candidates. Maximal degree in co-relation 18071. Up to 864 conditions per place. [2021-12-21 15:17:32,167 INFO L132 encePairwiseOnDemand]: 117/124 looper letters, 270 selfloop transitions, 44 changer transitions 2/408 dead transitions. [2021-12-21 15:17:32,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 408 transitions, 9763 flow [2021-12-21 15:17:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:32,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 538 transitions. [2021-12-21 15:17:32,168 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.867741935483871 [2021-12-21 15:17:32,168 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 538 transitions. [2021-12-21 15:17:32,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 538 transitions. [2021-12-21 15:17:32,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:32,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 538 transitions. [2021-12-21 15:17:32,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,170 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,170 INFO L186 Difference]: Start difference. First operand has 286 places, 390 transitions, 8964 flow. Second operand 5 states and 538 transitions. [2021-12-21 15:17:32,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 408 transitions, 9763 flow [2021-12-21 15:17:32,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 408 transitions, 9749 flow, removed 7 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:32,455 INFO L242 Difference]: Finished difference. Result has 291 places, 390 transitions, 9054 flow [2021-12-21 15:17:32,456 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=8910, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9054, PETRI_PLACES=291, PETRI_TRANSITIONS=390} [2021-12-21 15:17:32,456 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 179 predicate places. [2021-12-21 15:17:32,456 INFO L470 AbstractCegarLoop]: Abstraction has has 291 places, 390 transitions, 9054 flow [2021-12-21 15:17:32,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:32,456 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:32,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 15:17:32,457 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash 899180921, now seen corresponding path program 4 times [2021-12-21 15:17:32,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:32,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187211310] [2021-12-21 15:17:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:32,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:32,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:32,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187211310] [2021-12-21 15:17:32,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187211310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:32,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:32,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:32,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436521728] [2021-12-21 15:17:32,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:32,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:32,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:32,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:32,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:32,508 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:32,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 390 transitions, 9054 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:32,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:32,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:33,364 INFO L129 PetriNetUnfolder]: 740/5853 cut-off events. [2021-12-21 15:17:33,365 INFO L130 PetriNetUnfolder]: For 51735/51999 co-relation queries the response was YES. [2021-12-21 15:17:33,425 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18866 conditions, 5853 events. 740/5853 cut-off events. For 51735/51999 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 71719 event pairs, 225 based on Foata normal form. 69/5669 useless extension candidates. Maximal degree in co-relation 17671. Up to 562 conditions per place. [2021-12-21 15:17:33,442 INFO L132 encePairwiseOnDemand]: 114/124 looper letters, 245 selfloop transitions, 70 changer transitions 2/409 dead transitions. [2021-12-21 15:17:33,442 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 409 transitions, 9882 flow [2021-12-21 15:17:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:33,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:33,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 542 transitions. [2021-12-21 15:17:33,443 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8741935483870967 [2021-12-21 15:17:33,443 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 542 transitions. [2021-12-21 15:17:33,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 542 transitions. [2021-12-21 15:17:33,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:33,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 542 transitions. [2021-12-21 15:17:33,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:33,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:33,445 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:33,445 INFO L186 Difference]: Start difference. First operand has 291 places, 390 transitions, 9054 flow. Second operand 5 states and 542 transitions. [2021-12-21 15:17:33,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 409 transitions, 9882 flow [2021-12-21 15:17:33,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 409 transitions, 9861 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:33,788 INFO L242 Difference]: Finished difference. Result has 295 places, 390 transitions, 9223 flow [2021-12-21 15:17:33,788 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=8993, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9223, PETRI_PLACES=295, PETRI_TRANSITIONS=390} [2021-12-21 15:17:33,788 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 183 predicate places. [2021-12-21 15:17:33,789 INFO L470 AbstractCegarLoop]: Abstraction has has 295 places, 390 transitions, 9223 flow [2021-12-21 15:17:33,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:33,789 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:33,789 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:33,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 15:17:33,789 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:33,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1814977475, now seen corresponding path program 9 times [2021-12-21 15:17:33,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:33,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627994756] [2021-12-21 15:17:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:33,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:33,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:33,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627994756] [2021-12-21 15:17:33,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627994756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:33,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:33,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:33,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466738860] [2021-12-21 15:17:33,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:33,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:33,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:33,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:33,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:33,844 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:33,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 390 transitions, 9223 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:33,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:33,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:33,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:34,748 INFO L129 PetriNetUnfolder]: 760/6040 cut-off events. [2021-12-21 15:17:34,749 INFO L130 PetriNetUnfolder]: For 54023/54293 co-relation queries the response was YES. [2021-12-21 15:17:34,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19429 conditions, 6040 events. 760/6040 cut-off events. For 54023/54293 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 74288 event pairs, 198 based on Foata normal form. 72/5867 useless extension candidates. Maximal degree in co-relation 18233. Up to 627 conditions per place. [2021-12-21 15:17:34,825 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 244 selfloop transitions, 90 changer transitions 6/432 dead transitions. [2021-12-21 15:17:34,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 432 transitions, 10636 flow [2021-12-21 15:17:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:17:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-21 15:17:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 660 transitions. [2021-12-21 15:17:34,833 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8870967741935484 [2021-12-21 15:17:34,833 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 660 transitions. [2021-12-21 15:17:34,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 660 transitions. [2021-12-21 15:17:34,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:34,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 660 transitions. [2021-12-21 15:17:34,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:34,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:34,834 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:34,835 INFO L186 Difference]: Start difference. First operand has 295 places, 390 transitions, 9223 flow. Second operand 6 states and 660 transitions. [2021-12-21 15:17:34,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 432 transitions, 10636 flow [2021-12-21 15:17:35,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 432 transitions, 10542 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-21 15:17:35,175 INFO L242 Difference]: Finished difference. Result has 301 places, 403 transitions, 9843 flow [2021-12-21 15:17:35,175 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=9098, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9843, PETRI_PLACES=301, PETRI_TRANSITIONS=403} [2021-12-21 15:17:35,176 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 189 predicate places. [2021-12-21 15:17:35,176 INFO L470 AbstractCegarLoop]: Abstraction has has 301 places, 403 transitions, 9843 flow [2021-12-21 15:17:35,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:35,176 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:35,176 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:35,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 15:17:35,177 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:35,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:35,177 INFO L85 PathProgramCache]: Analyzing trace with hash 216516765, now seen corresponding path program 5 times [2021-12-21 15:17:35,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:35,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079556094] [2021-12-21 15:17:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:35,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:35,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:35,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079556094] [2021-12-21 15:17:35,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079556094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:35,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:35,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:35,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945505654] [2021-12-21 15:17:35,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:35,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:35,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:35,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:35,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:35,283 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:35,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 403 transitions, 9843 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:35,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:35,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:35,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:36,171 INFO L129 PetriNetUnfolder]: 755/5952 cut-off events. [2021-12-21 15:17:36,171 INFO L130 PetriNetUnfolder]: For 52888/53167 co-relation queries the response was YES. [2021-12-21 15:17:36,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19477 conditions, 5952 events. 755/5952 cut-off events. For 52888/53167 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 72865 event pairs, 156 based on Foata normal form. 72/5765 useless extension candidates. Maximal degree in co-relation 18260. Up to 818 conditions per place. [2021-12-21 15:17:36,244 INFO L132 encePairwiseOnDemand]: 116/124 looper letters, 272 selfloop transitions, 54 changer transitions 0/418 dead transitions. [2021-12-21 15:17:36,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 418 transitions, 10650 flow [2021-12-21 15:17:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:36,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 538 transitions. [2021-12-21 15:17:36,245 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.867741935483871 [2021-12-21 15:17:36,245 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 538 transitions. [2021-12-21 15:17:36,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 538 transitions. [2021-12-21 15:17:36,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:36,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 538 transitions. [2021-12-21 15:17:36,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:36,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:36,246 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:36,246 INFO L186 Difference]: Start difference. First operand has 301 places, 403 transitions, 9843 flow. Second operand 5 states and 538 transitions. [2021-12-21 15:17:36,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 418 transitions, 10650 flow [2021-12-21 15:17:36,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 418 transitions, 10604 flow, removed 23 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:36,558 INFO L242 Difference]: Finished difference. Result has 306 places, 406 transitions, 10003 flow [2021-12-21 15:17:36,558 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=9759, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10003, PETRI_PLACES=306, PETRI_TRANSITIONS=406} [2021-12-21 15:17:36,559 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 194 predicate places. [2021-12-21 15:17:36,559 INFO L470 AbstractCegarLoop]: Abstraction has has 306 places, 406 transitions, 10003 flow [2021-12-21 15:17:36,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:36,560 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:36,560 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:36,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-21 15:17:36,560 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:36,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1228147129, now seen corresponding path program 6 times [2021-12-21 15:17:36,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:36,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948738930] [2021-12-21 15:17:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:36,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:36,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:36,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948738930] [2021-12-21 15:17:36,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948738930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:36,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:36,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:36,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088328813] [2021-12-21 15:17:36,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:36,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:36,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:36,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:36,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:36,606 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:36,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 406 transitions, 10003 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:36,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:36,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:36,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:37,535 INFO L129 PetriNetUnfolder]: 744/5959 cut-off events. [2021-12-21 15:17:37,536 INFO L130 PetriNetUnfolder]: For 54521/54785 co-relation queries the response was YES. [2021-12-21 15:17:37,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19547 conditions, 5959 events. 744/5959 cut-off events. For 54521/54785 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 73103 event pairs, 201 based on Foata normal form. 69/5777 useless extension candidates. Maximal degree in co-relation 18329. Up to 627 conditions per place. [2021-12-21 15:17:37,605 INFO L132 encePairwiseOnDemand]: 116/124 looper letters, 260 selfloop transitions, 71 changer transitions 0/423 dead transitions. [2021-12-21 15:17:37,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 423 transitions, 10814 flow [2021-12-21 15:17:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 541 transitions. [2021-12-21 15:17:37,606 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8725806451612903 [2021-12-21 15:17:37,606 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 541 transitions. [2021-12-21 15:17:37,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 541 transitions. [2021-12-21 15:17:37,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:37,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 541 transitions. [2021-12-21 15:17:37,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:37,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:37,607 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:37,607 INFO L186 Difference]: Start difference. First operand has 306 places, 406 transitions, 10003 flow. Second operand 5 states and 541 transitions. [2021-12-21 15:17:37,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 423 transitions, 10814 flow [2021-12-21 15:17:37,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 423 transitions, 10769 flow, removed 9 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:37,902 INFO L242 Difference]: Finished difference. Result has 310 places, 407 transitions, 10148 flow [2021-12-21 15:17:37,902 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=9926, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10148, PETRI_PLACES=310, PETRI_TRANSITIONS=407} [2021-12-21 15:17:37,902 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 198 predicate places. [2021-12-21 15:17:37,902 INFO L470 AbstractCegarLoop]: Abstraction has has 310 places, 407 transitions, 10148 flow [2021-12-21 15:17:37,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:37,903 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:37,903 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:37,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-21 15:17:37,903 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:37,903 INFO L85 PathProgramCache]: Analyzing trace with hash 947096267, now seen corresponding path program 6 times [2021-12-21 15:17:37,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:37,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620469806] [2021-12-21 15:17:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:37,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:37,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:37,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620469806] [2021-12-21 15:17:37,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620469806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:37,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:37,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:37,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6247692] [2021-12-21 15:17:37,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:37,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:37,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:37,946 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:37,946 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 407 transitions, 10148 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:37,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:37,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:37,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:38,869 INFO L129 PetriNetUnfolder]: 738/5957 cut-off events. [2021-12-21 15:17:38,869 INFO L130 PetriNetUnfolder]: For 59717/59974 co-relation queries the response was YES. [2021-12-21 15:17:38,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19605 conditions, 5957 events. 738/5957 cut-off events. For 59717/59974 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 73194 event pairs, 186 based on Foata normal form. 70/5796 useless extension candidates. Maximal degree in co-relation 18402. Up to 600 conditions per place. [2021-12-21 15:17:38,953 INFO L132 encePairwiseOnDemand]: 110/124 looper letters, 237 selfloop transitions, 97 changer transitions 2/428 dead transitions. [2021-12-21 15:17:38,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 428 transitions, 10938 flow [2021-12-21 15:17:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:17:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-21 15:17:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 659 transitions. [2021-12-21 15:17:38,954 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.885752688172043 [2021-12-21 15:17:38,954 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 659 transitions. [2021-12-21 15:17:38,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 659 transitions. [2021-12-21 15:17:38,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:38,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 659 transitions. [2021-12-21 15:17:38,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.83333333333333) internal successors, (659), 6 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:38,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:38,956 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:38,957 INFO L186 Difference]: Start difference. First operand has 310 places, 407 transitions, 10148 flow. Second operand 6 states and 659 transitions. [2021-12-21 15:17:38,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 428 transitions, 10938 flow [2021-12-21 15:17:39,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 428 transitions, 10880 flow, removed 13 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:39,328 INFO L242 Difference]: Finished difference. Result has 314 places, 405 transitions, 10205 flow [2021-12-21 15:17:39,329 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=10046, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10205, PETRI_PLACES=314, PETRI_TRANSITIONS=405} [2021-12-21 15:17:39,329 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 202 predicate places. [2021-12-21 15:17:39,329 INFO L470 AbstractCegarLoop]: Abstraction has has 314 places, 405 transitions, 10205 flow [2021-12-21 15:17:39,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:39,330 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:39,330 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:39,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-21 15:17:39,330 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:39,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1895957427, now seen corresponding path program 7 times [2021-12-21 15:17:39,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:39,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058215159] [2021-12-21 15:17:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:39,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:39,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:39,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058215159] [2021-12-21 15:17:39,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058215159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:39,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:39,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:39,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71169365] [2021-12-21 15:17:39,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:39,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:39,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:39,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:39,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:39,417 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:39,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 405 transitions, 10205 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:39,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:39,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:39,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:40,380 INFO L129 PetriNetUnfolder]: 771/6144 cut-off events. [2021-12-21 15:17:40,380 INFO L130 PetriNetUnfolder]: For 57411/57728 co-relation queries the response was YES. [2021-12-21 15:17:40,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20163 conditions, 6144 events. 771/6144 cut-off events. For 57411/57728 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 75888 event pairs, 202 based on Foata normal form. 79/5960 useless extension candidates. Maximal degree in co-relation 18934. Up to 610 conditions per place. [2021-12-21 15:17:40,444 INFO L132 encePairwiseOnDemand]: 114/124 looper letters, 259 selfloop transitions, 82 changer transitions 1/434 dead transitions. [2021-12-21 15:17:40,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 434 transitions, 11421 flow [2021-12-21 15:17:40,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 546 transitions. [2021-12-21 15:17:40,445 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8806451612903226 [2021-12-21 15:17:40,445 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 546 transitions. [2021-12-21 15:17:40,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 546 transitions. [2021-12-21 15:17:40,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:40,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 546 transitions. [2021-12-21 15:17:40,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.2) internal successors, (546), 5 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,447 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,447 INFO L186 Difference]: Start difference. First operand has 314 places, 405 transitions, 10205 flow. Second operand 5 states and 546 transitions. [2021-12-21 15:17:40,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 434 transitions, 11421 flow [2021-12-21 15:17:40,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 434 transitions, 11324 flow, removed 12 selfloop flow, removed 2 redundant places. [2021-12-21 15:17:40,743 INFO L242 Difference]: Finished difference. Result has 318 places, 411 transitions, 10627 flow [2021-12-21 15:17:40,743 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=10078, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10627, PETRI_PLACES=318, PETRI_TRANSITIONS=411} [2021-12-21 15:17:40,744 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 206 predicate places. [2021-12-21 15:17:40,744 INFO L470 AbstractCegarLoop]: Abstraction has has 318 places, 411 transitions, 10627 flow [2021-12-21 15:17:40,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,744 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:40,744 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:40,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-21 15:17:40,744 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:40,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:40,745 INFO L85 PathProgramCache]: Analyzing trace with hash 247948725, now seen corresponding path program 7 times [2021-12-21 15:17:40,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:40,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335043822] [2021-12-21 15:17:40,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:40,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:40,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:40,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335043822] [2021-12-21 15:17:40,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335043822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:40,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:40,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:40,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93707070] [2021-12-21 15:17:40,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:40,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:40,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:40,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:40,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:40,794 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:40,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 411 transitions, 10627 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:40,795 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:40,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:41,778 INFO L129 PetriNetUnfolder]: 783/6266 cut-off events. [2021-12-21 15:17:41,778 INFO L130 PetriNetUnfolder]: For 64617/64945 co-relation queries the response was YES. [2021-12-21 15:17:41,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20687 conditions, 6266 events. 783/6266 cut-off events. For 64617/64945 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 77986 event pairs, 213 based on Foata normal form. 94/6098 useless extension candidates. Maximal degree in co-relation 19491. Up to 635 conditions per place. [2021-12-21 15:17:41,864 INFO L132 encePairwiseOnDemand]: 109/124 looper letters, 250 selfloop transitions, 88 changer transitions 6/436 dead transitions. [2021-12-21 15:17:41,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 436 transitions, 11625 flow [2021-12-21 15:17:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2021-12-21 15:17:41,866 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8919354838709678 [2021-12-21 15:17:41,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2021-12-21 15:17:41,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2021-12-21 15:17:41,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:41,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2021-12-21 15:17:41,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,867 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,867 INFO L186 Difference]: Start difference. First operand has 318 places, 411 transitions, 10627 flow. Second operand 5 states and 553 transitions. [2021-12-21 15:17:41,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 436 transitions, 11625 flow [2021-12-21 15:17:42,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 436 transitions, 11558 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-12-21 15:17:42,228 INFO L242 Difference]: Finished difference. Result has 323 places, 410 transitions, 10766 flow [2021-12-21 15:17:42,229 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=10343, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10766, PETRI_PLACES=323, PETRI_TRANSITIONS=410} [2021-12-21 15:17:42,229 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 211 predicate places. [2021-12-21 15:17:42,229 INFO L470 AbstractCegarLoop]: Abstraction has has 323 places, 410 transitions, 10766 flow [2021-12-21 15:17:42,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:42,229 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:42,229 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:42,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-21 15:17:42,230 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:42,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1382150905, now seen corresponding path program 8 times [2021-12-21 15:17:42,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:42,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201778388] [2021-12-21 15:17:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:42,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:42,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:42,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201778388] [2021-12-21 15:17:42,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201778388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:42,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:42,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:42,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134060545] [2021-12-21 15:17:42,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:42,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:42,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:42,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:42,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:42,292 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:42,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 410 transitions, 10766 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:42,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:42,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:42,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:43,334 INFO L129 PetriNetUnfolder]: 756/6078 cut-off events. [2021-12-21 15:17:43,334 INFO L130 PetriNetUnfolder]: For 64566/64874 co-relation queries the response was YES. [2021-12-21 15:17:43,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20354 conditions, 6078 events. 756/6078 cut-off events. For 64566/64874 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 75360 event pairs, 216 based on Foata normal form. 77/5903 useless extension candidates. Maximal degree in co-relation 19153. Up to 598 conditions per place. [2021-12-21 15:17:43,390 INFO L132 encePairwiseOnDemand]: 114/124 looper letters, 257 selfloop transitions, 79 changer transitions 1/429 dead transitions. [2021-12-21 15:17:43,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 429 transitions, 11601 flow [2021-12-21 15:17:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 551 transitions. [2021-12-21 15:17:43,391 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8887096774193548 [2021-12-21 15:17:43,391 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 551 transitions. [2021-12-21 15:17:43,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 551 transitions. [2021-12-21 15:17:43,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:43,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 551 transitions. [2021-12-21 15:17:43,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:43,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:43,392 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:43,392 INFO L186 Difference]: Start difference. First operand has 323 places, 410 transitions, 10766 flow. Second operand 5 states and 551 transitions. [2021-12-21 15:17:43,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 429 transitions, 11601 flow [2021-12-21 15:17:43,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 429 transitions, 11445 flow, removed 21 selfloop flow, removed 3 redundant places. [2021-12-21 15:17:43,705 INFO L242 Difference]: Finished difference. Result has 324 places, 408 transitions, 10675 flow [2021-12-21 15:17:43,705 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=10567, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10675, PETRI_PLACES=324, PETRI_TRANSITIONS=408} [2021-12-21 15:17:43,706 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 212 predicate places. [2021-12-21 15:17:43,706 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 408 transitions, 10675 flow [2021-12-21 15:17:43,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:43,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:43,706 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:43,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-21 15:17:43,706 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1751579267, now seen corresponding path program 8 times [2021-12-21 15:17:43,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:43,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950818895] [2021-12-21 15:17:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:43,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:43,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:43,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950818895] [2021-12-21 15:17:43,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950818895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:43,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:43,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:43,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734213308] [2021-12-21 15:17:43,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:43,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:43,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:43,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:43,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:43,759 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:43,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 408 transitions, 10675 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:43,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:43,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:43,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:44,743 INFO L129 PetriNetUnfolder]: 775/6239 cut-off events. [2021-12-21 15:17:44,743 INFO L130 PetriNetUnfolder]: For 61336/61665 co-relation queries the response was YES. [2021-12-21 15:17:44,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20634 conditions, 6239 events. 775/6239 cut-off events. For 61336/61665 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 77376 event pairs, 204 based on Foata normal form. 80/6053 useless extension candidates. Maximal degree in co-relation 19472. Up to 626 conditions per place. [2021-12-21 15:17:44,819 INFO L132 encePairwiseOnDemand]: 110/124 looper letters, 247 selfloop transitions, 89 changer transitions 0/428 dead transitions. [2021-12-21 15:17:44,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 428 transitions, 11591 flow [2021-12-21 15:17:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 546 transitions. [2021-12-21 15:17:44,822 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8806451612903226 [2021-12-21 15:17:44,822 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 546 transitions. [2021-12-21 15:17:44,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 546 transitions. [2021-12-21 15:17:44,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:44,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 546 transitions. [2021-12-21 15:17:44,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.2) internal successors, (546), 5 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:44,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:44,823 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:44,823 INFO L186 Difference]: Start difference. First operand has 324 places, 408 transitions, 10675 flow. Second operand 5 states and 546 transitions. [2021-12-21 15:17:44,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 428 transitions, 11591 flow [2021-12-21 15:17:45,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 428 transitions, 11467 flow, removed 23 selfloop flow, removed 4 redundant places. [2021-12-21 15:17:45,222 INFO L242 Difference]: Finished difference. Result has 325 places, 410 transitions, 10866 flow [2021-12-21 15:17:45,222 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=10508, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10866, PETRI_PLACES=325, PETRI_TRANSITIONS=410} [2021-12-21 15:17:45,223 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 213 predicate places. [2021-12-21 15:17:45,223 INFO L470 AbstractCegarLoop]: Abstraction has has 325 places, 410 transitions, 10866 flow [2021-12-21 15:17:45,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:45,223 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:45,223 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:45,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-21 15:17:45,223 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:45,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1641676151, now seen corresponding path program 10 times [2021-12-21 15:17:45,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:45,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412569843] [2021-12-21 15:17:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:45,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:45,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:45,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412569843] [2021-12-21 15:17:45,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412569843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:45,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:45,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:45,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263336879] [2021-12-21 15:17:45,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:45,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:45,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:45,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:45,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:45,295 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:45,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 410 transitions, 10866 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:45,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:45,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:45,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:46,332 INFO L129 PetriNetUnfolder]: 777/6348 cut-off events. [2021-12-21 15:17:46,332 INFO L130 PetriNetUnfolder]: For 67814/68108 co-relation queries the response was YES. [2021-12-21 15:17:46,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21027 conditions, 6348 events. 777/6348 cut-off events. For 67814/68108 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 79249 event pairs, 225 based on Foata normal form. 90/6163 useless extension candidates. Maximal degree in co-relation 19660. Up to 649 conditions per place. [2021-12-21 15:17:46,395 INFO L132 encePairwiseOnDemand]: 112/124 looper letters, 265 selfloop transitions, 85 changer transitions 2/444 dead transitions. [2021-12-21 15:17:46,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 444 transitions, 12409 flow [2021-12-21 15:17:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2021-12-21 15:17:46,396 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8919354838709678 [2021-12-21 15:17:46,396 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2021-12-21 15:17:46,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2021-12-21 15:17:46,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:46,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2021-12-21 15:17:46,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:46,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:46,398 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:46,398 INFO L186 Difference]: Start difference. First operand has 325 places, 410 transitions, 10866 flow. Second operand 5 states and 553 transitions. [2021-12-21 15:17:46,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 444 transitions, 12409 flow [2021-12-21 15:17:46,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 444 transitions, 12241 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-21 15:17:46,704 INFO L242 Difference]: Finished difference. Result has 329 places, 414 transitions, 11256 flow [2021-12-21 15:17:46,705 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=10582, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11256, PETRI_PLACES=329, PETRI_TRANSITIONS=414} [2021-12-21 15:17:46,705 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 217 predicate places. [2021-12-21 15:17:46,705 INFO L470 AbstractCegarLoop]: Abstraction has has 329 places, 414 transitions, 11256 flow [2021-12-21 15:17:46,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:46,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:46,706 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:46,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-21 15:17:46,706 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:46,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:46,706 INFO L85 PathProgramCache]: Analyzing trace with hash -892420571, now seen corresponding path program 10 times [2021-12-21 15:17:46,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:46,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038954325] [2021-12-21 15:17:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:46,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:46,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:46,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038954325] [2021-12-21 15:17:46,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038954325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:46,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:46,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:46,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036874535] [2021-12-21 15:17:46,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:46,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:46,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:46,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:46,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:46,764 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:46,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 414 transitions, 11256 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:46,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:46,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:46,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:47,855 INFO L129 PetriNetUnfolder]: 802/6544 cut-off events. [2021-12-21 15:17:47,856 INFO L130 PetriNetUnfolder]: For 71410/71727 co-relation queries the response was YES. [2021-12-21 15:17:47,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21929 conditions, 6544 events. 802/6544 cut-off events. For 71410/71727 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 82364 event pairs, 256 based on Foata normal form. 80/6341 useless extension candidates. Maximal degree in co-relation 20453. Up to 662 conditions per place. [2021-12-21 15:17:47,950 INFO L132 encePairwiseOnDemand]: 112/124 looper letters, 275 selfloop transitions, 86 changer transitions 1/454 dead transitions. [2021-12-21 15:17:47,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 454 transitions, 12889 flow [2021-12-21 15:17:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:47,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 549 transitions. [2021-12-21 15:17:47,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.885483870967742 [2021-12-21 15:17:47,951 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 549 transitions. [2021-12-21 15:17:47,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 549 transitions. [2021-12-21 15:17:47,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:47,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 549 transitions. [2021-12-21 15:17:47,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:47,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:47,953 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:47,953 INFO L186 Difference]: Start difference. First operand has 329 places, 414 transitions, 11256 flow. Second operand 5 states and 549 transitions. [2021-12-21 15:17:47,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 454 transitions, 12889 flow [2021-12-21 15:17:48,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 454 transitions, 12827 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:48,358 INFO L242 Difference]: Finished difference. Result has 336 places, 430 transitions, 12154 flow [2021-12-21 15:17:48,359 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=11156, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12154, PETRI_PLACES=336, PETRI_TRANSITIONS=430} [2021-12-21 15:17:48,359 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 224 predicate places. [2021-12-21 15:17:48,359 INFO L470 AbstractCegarLoop]: Abstraction has has 336 places, 430 transitions, 12154 flow [2021-12-21 15:17:48,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:48,359 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:48,360 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:48,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-21 15:17:48,360 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:48,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1390556285, now seen corresponding path program 11 times [2021-12-21 15:17:48,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:48,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912533426] [2021-12-21 15:17:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:48,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:48,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912533426] [2021-12-21 15:17:48,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912533426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:48,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:48,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:48,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034518581] [2021-12-21 15:17:48,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:48,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:48,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:48,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:48,410 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:48,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 430 transitions, 12154 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:48,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:48,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:48,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:49,687 INFO L129 PetriNetUnfolder]: 811/6781 cut-off events. [2021-12-21 15:17:49,687 INFO L130 PetriNetUnfolder]: For 76561/76859 co-relation queries the response was YES. [2021-12-21 15:17:49,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22469 conditions, 6781 events. 811/6781 cut-off events. For 76561/76859 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 86124 event pairs, 243 based on Foata normal form. 88/6564 useless extension candidates. Maximal degree in co-relation 20991. Up to 705 conditions per place. [2021-12-21 15:17:49,774 INFO L132 encePairwiseOnDemand]: 112/124 looper letters, 280 selfloop transitions, 84 changer transitions 3/459 dead transitions. [2021-12-21 15:17:49,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 459 transitions, 13449 flow [2021-12-21 15:17:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2021-12-21 15:17:49,775 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8919354838709678 [2021-12-21 15:17:49,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2021-12-21 15:17:49,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2021-12-21 15:17:49,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:49,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2021-12-21 15:17:49,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:49,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:49,777 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:49,777 INFO L186 Difference]: Start difference. First operand has 336 places, 430 transitions, 12154 flow. Second operand 5 states and 553 transitions. [2021-12-21 15:17:49,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 459 transitions, 13449 flow [2021-12-21 15:17:50,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 459 transitions, 13386 flow, removed 5 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:50,196 INFO L242 Difference]: Finished difference. Result has 342 places, 435 transitions, 12688 flow [2021-12-21 15:17:50,196 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=11944, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12688, PETRI_PLACES=342, PETRI_TRANSITIONS=435} [2021-12-21 15:17:50,197 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 230 predicate places. [2021-12-21 15:17:50,197 INFO L470 AbstractCegarLoop]: Abstraction has has 342 places, 435 transitions, 12688 flow [2021-12-21 15:17:50,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:50,197 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:50,197 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:50,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-21 15:17:50,198 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:50,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:50,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1855961239, now seen corresponding path program 12 times [2021-12-21 15:17:50,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:50,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261794] [2021-12-21 15:17:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:50,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:50,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:50,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261794] [2021-12-21 15:17:50,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:50,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:50,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:50,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725196887] [2021-12-21 15:17:50,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:50,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:50,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:50,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:50,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:50,253 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:50,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 435 transitions, 12688 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:50,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:50,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:50,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:51,481 INFO L129 PetriNetUnfolder]: 812/6736 cut-off events. [2021-12-21 15:17:51,481 INFO L130 PetriNetUnfolder]: For 76707/77021 co-relation queries the response was YES. [2021-12-21 15:17:51,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22631 conditions, 6736 events. 812/6736 cut-off events. For 76707/77021 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 85229 event pairs, 251 based on Foata normal form. 80/6513 useless extension candidates. Maximal degree in co-relation 21150. Up to 698 conditions per place. [2021-12-21 15:17:51,567 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 261 selfloop transitions, 100 changer transitions 3/456 dead transitions. [2021-12-21 15:17:51,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 456 transitions, 13563 flow [2021-12-21 15:17:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:17:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-21 15:17:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 653 transitions. [2021-12-21 15:17:51,568 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8776881720430108 [2021-12-21 15:17:51,568 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 653 transitions. [2021-12-21 15:17:51,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 653 transitions. [2021-12-21 15:17:51,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:51,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 653 transitions. [2021-12-21 15:17:51,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 108.83333333333333) internal successors, (653), 6 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:51,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:51,570 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:51,570 INFO L186 Difference]: Start difference. First operand has 342 places, 435 transitions, 12688 flow. Second operand 6 states and 653 transitions. [2021-12-21 15:17:51,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 456 transitions, 13563 flow [2021-12-21 15:17:51,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 456 transitions, 13548 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:51,994 INFO L242 Difference]: Finished difference. Result has 346 places, 433 transitions, 12759 flow [2021-12-21 15:17:51,994 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=12624, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12759, PETRI_PLACES=346, PETRI_TRANSITIONS=433} [2021-12-21 15:17:51,994 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 234 predicate places. [2021-12-21 15:17:51,994 INFO L470 AbstractCegarLoop]: Abstraction has has 346 places, 433 transitions, 12759 flow [2021-12-21 15:17:51,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:51,995 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:51,995 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:51,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-21 15:17:51,995 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:51,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:51,995 INFO L85 PathProgramCache]: Analyzing trace with hash -581066469, now seen corresponding path program 11 times [2021-12-21 15:17:51,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:51,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189821562] [2021-12-21 15:17:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:51,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:52,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:52,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189821562] [2021-12-21 15:17:52,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189821562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:52,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:52,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:17:52,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694262470] [2021-12-21 15:17:52,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:52,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:17:52,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:52,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:17:52,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:17:52,058 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:52,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 433 transitions, 12759 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:52,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:52,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:52,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:53,308 INFO L129 PetriNetUnfolder]: 856/7153 cut-off events. [2021-12-21 15:17:53,308 INFO L130 PetriNetUnfolder]: For 78690/79030 co-relation queries the response was YES. [2021-12-21 15:17:53,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23549 conditions, 7153 events. 856/7153 cut-off events. For 78690/79030 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 91471 event pairs, 258 based on Foata normal form. 90/6929 useless extension candidates. Maximal degree in co-relation 22183. Up to 770 conditions per place. [2021-12-21 15:17:53,377 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 272 selfloop transitions, 92 changer transitions 0/456 dead transitions. [2021-12-21 15:17:53,378 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 456 transitions, 13830 flow [2021-12-21 15:17:53,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:17:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:17:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 548 transitions. [2021-12-21 15:17:53,379 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8838709677419355 [2021-12-21 15:17:53,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 548 transitions. [2021-12-21 15:17:53,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 548 transitions. [2021-12-21 15:17:53,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:53,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 548 transitions. [2021-12-21 15:17:53,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:53,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:53,380 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:53,380 INFO L186 Difference]: Start difference. First operand has 346 places, 433 transitions, 12759 flow. Second operand 5 states and 548 transitions. [2021-12-21 15:17:53,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 456 transitions, 13830 flow [2021-12-21 15:17:53,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 456 transitions, 13592 flow, removed 44 selfloop flow, removed 4 redundant places. [2021-12-21 15:17:53,775 INFO L242 Difference]: Finished difference. Result has 348 places, 438 transitions, 13038 flow [2021-12-21 15:17:53,775 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=12432, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=13038, PETRI_PLACES=348, PETRI_TRANSITIONS=438} [2021-12-21 15:17:53,776 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 236 predicate places. [2021-12-21 15:17:53,776 INFO L470 AbstractCegarLoop]: Abstraction has has 348 places, 438 transitions, 13038 flow [2021-12-21 15:17:53,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:53,776 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:53,776 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:53,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-21 15:17:53,776 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2128585162, now seen corresponding path program 1 times [2021-12-21 15:17:53,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:53,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147350613] [2021-12-21 15:17:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:53,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:53,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:53,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147350613] [2021-12-21 15:17:53,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147350613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:53,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:53,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:17:53,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615784162] [2021-12-21 15:17:53,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:53,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:17:53,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:53,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:17:53,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:17:53,829 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:53,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 438 transitions, 13038 flow. Second operand has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:53,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:53,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:53,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:54,936 INFO L129 PetriNetUnfolder]: 562/5490 cut-off events. [2021-12-21 15:17:54,936 INFO L130 PetriNetUnfolder]: For 57435/68368 co-relation queries the response was YES. [2021-12-21 15:17:55,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17023 conditions, 5490 events. 562/5490 cut-off events. For 57435/68368 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 71859 event pairs, 152 based on Foata normal form. 172/5443 useless extension candidates. Maximal degree in co-relation 15988. Up to 823 conditions per place. [2021-12-21 15:17:55,009 INFO L132 encePairwiseOnDemand]: 116/124 looper letters, 21 selfloop transitions, 0 changer transitions 132/458 dead transitions. [2021-12-21 15:17:55,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 458 transitions, 13175 flow [2021-12-21 15:17:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:17:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-21 15:17:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 916 transitions. [2021-12-21 15:17:55,010 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8207885304659498 [2021-12-21 15:17:55,010 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 916 transitions. [2021-12-21 15:17:55,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 916 transitions. [2021-12-21 15:17:55,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:55,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 916 transitions. [2021-12-21 15:17:55,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 101.77777777777777) internal successors, (916), 9 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:55,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 124.0) internal successors, (1240), 10 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:55,012 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 124.0) internal successors, (1240), 10 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:55,012 INFO L186 Difference]: Start difference. First operand has 348 places, 438 transitions, 13038 flow. Second operand 9 states and 916 transitions. [2021-12-21 15:17:55,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 458 transitions, 13175 flow [2021-12-21 15:17:55,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 458 transitions, 13111 flow, removed 6 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:55,321 INFO L242 Difference]: Finished difference. Result has 362 places, 326 transitions, 8612 flow [2021-12-21 15:17:55,321 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=12974, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8612, PETRI_PLACES=362, PETRI_TRANSITIONS=326} [2021-12-21 15:17:55,321 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 250 predicate places. [2021-12-21 15:17:55,321 INFO L470 AbstractCegarLoop]: Abstraction has has 362 places, 326 transitions, 8612 flow [2021-12-21 15:17:55,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:55,322 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:55,322 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:55,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-21 15:17:55,322 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:55,322 INFO L85 PathProgramCache]: Analyzing trace with hash -406601066, now seen corresponding path program 1 times [2021-12-21 15:17:55,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:55,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115451931] [2021-12-21 15:17:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:55,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:55,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:55,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115451931] [2021-12-21 15:17:55,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115451931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:55,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:55,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:17:55,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120366640] [2021-12-21 15:17:55,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:55,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:17:55,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:55,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:17:55,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:17:55,358 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 124 [2021-12-21 15:17:55,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 326 transitions, 8612 flow. Second operand has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:55,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:55,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 124 [2021-12-21 15:17:55,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:56,006 INFO L129 PetriNetUnfolder]: 396/3568 cut-off events. [2021-12-21 15:17:56,006 INFO L130 PetriNetUnfolder]: For 39922/44131 co-relation queries the response was YES. [2021-12-21 15:17:56,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12135 conditions, 3568 events. 396/3568 cut-off events. For 39922/44131 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43685 event pairs, 83 based on Foata normal form. 148/3587 useless extension candidates. Maximal degree in co-relation 12025. Up to 377 conditions per place. [2021-12-21 15:17:56,052 INFO L132 encePairwiseOnDemand]: 116/124 looper letters, 19 selfloop transitions, 0 changer transitions 172/345 dead transitions. [2021-12-21 15:17:56,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 345 transitions, 8753 flow [2021-12-21 15:17:56,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:17:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-21 15:17:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 914 transitions. [2021-12-21 15:17:56,053 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8189964157706093 [2021-12-21 15:17:56,053 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 914 transitions. [2021-12-21 15:17:56,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 914 transitions. [2021-12-21 15:17:56,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:56,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 914 transitions. [2021-12-21 15:17:56,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 101.55555555555556) internal successors, (914), 9 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:56,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 124.0) internal successors, (1240), 10 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:56,055 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 124.0) internal successors, (1240), 10 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:56,056 INFO L186 Difference]: Start difference. First operand has 362 places, 326 transitions, 8612 flow. Second operand 9 states and 914 transitions. [2021-12-21 15:17:56,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 345 transitions, 8753 flow [2021-12-21 15:17:56,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 345 transitions, 7925 flow, removed 200 selfloop flow, removed 26 redundant places. [2021-12-21 15:17:56,235 INFO L242 Difference]: Finished difference. Result has 333 places, 173 transitions, 2897 flow [2021-12-21 15:17:56,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=7794, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2897, PETRI_PLACES=333, PETRI_TRANSITIONS=173} [2021-12-21 15:17:56,236 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 221 predicate places. [2021-12-21 15:17:56,236 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 173 transitions, 2897 flow [2021-12-21 15:17:56,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:56,236 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:56,236 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:56,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-21 15:17:56,237 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:56,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1967076804, now seen corresponding path program 1 times [2021-12-21 15:17:56,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:56,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372486184] [2021-12-21 15:17:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:56,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:56,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372486184] [2021-12-21 15:17:56,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372486184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:56,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:56,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:17:56,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199405505] [2021-12-21 15:17:56,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:56,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:17:56,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:56,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:17:56,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:17:56,303 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 124 [2021-12-21 15:17:56,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 173 transitions, 2897 flow. Second operand has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:56,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:56,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 124 [2021-12-21 15:17:56,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:56,827 INFO L129 PetriNetUnfolder]: 846/2443 cut-off events. [2021-12-21 15:17:56,827 INFO L130 PetriNetUnfolder]: For 7900/8154 co-relation queries the response was YES. [2021-12-21 15:17:56,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6651 conditions, 2443 events. 846/2443 cut-off events. For 7900/8154 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 22022 event pairs, 379 based on Foata normal form. 2/2360 useless extension candidates. Maximal degree in co-relation 6554. Up to 980 conditions per place. [2021-12-21 15:17:56,852 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 58 selfloop transitions, 24 changer transitions 16/241 dead transitions. [2021-12-21 15:17:56,852 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 241 transitions, 3330 flow [2021-12-21 15:17:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 15:17:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-21 15:17:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1517 transitions. [2021-12-21 15:17:56,853 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764616935483871 [2021-12-21 15:17:56,853 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1517 transitions. [2021-12-21 15:17:56,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1517 transitions. [2021-12-21 15:17:56,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:56,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1517 transitions. [2021-12-21 15:17:56,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.8125) internal successors, (1517), 16 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:56,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:56,893 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:56,893 INFO L186 Difference]: Start difference. First operand has 333 places, 173 transitions, 2897 flow. Second operand 16 states and 1517 transitions. [2021-12-21 15:17:56,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 241 transitions, 3330 flow [2021-12-21 15:17:56,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 241 transitions, 2420 flow, removed 109 selfloop flow, removed 78 redundant places. [2021-12-21 15:17:56,923 INFO L242 Difference]: Finished difference. Result has 236 places, 197 transitions, 2218 flow [2021-12-21 15:17:56,923 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2043, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2218, PETRI_PLACES=236, PETRI_TRANSITIONS=197} [2021-12-21 15:17:56,923 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 124 predicate places. [2021-12-21 15:17:56,924 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 197 transitions, 2218 flow [2021-12-21 15:17:56,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:56,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:56,924 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:56,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-21 15:17:56,924 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:56,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1310033352, now seen corresponding path program 1 times [2021-12-21 15:17:56,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:56,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411706427] [2021-12-21 15:17:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:56,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:56,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:56,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411706427] [2021-12-21 15:17:56,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411706427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:56,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:56,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:17:56,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044559295] [2021-12-21 15:17:56,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:56,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:17:56,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:56,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:17:56,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:17:56,987 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 124 [2021-12-21 15:17:56,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 197 transitions, 2218 flow. Second operand has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:56,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:56,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 124 [2021-12-21 15:17:56,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:57,509 INFO L129 PetriNetUnfolder]: 944/2751 cut-off events. [2021-12-21 15:17:57,509 INFO L130 PetriNetUnfolder]: For 3974/4135 co-relation queries the response was YES. [2021-12-21 15:17:57,529 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8128 conditions, 2751 events. 944/2751 cut-off events. For 3974/4135 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 25738 event pairs, 389 based on Foata normal form. 2/2671 useless extension candidates. Maximal degree in co-relation 8076. Up to 1141 conditions per place. [2021-12-21 15:17:57,536 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 94 selfloop transitions, 31 changer transitions 28/296 dead transitions. [2021-12-21 15:17:57,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 296 transitions, 2896 flow [2021-12-21 15:17:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 15:17:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-21 15:17:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2264 transitions. [2021-12-21 15:17:57,538 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.760752688172043 [2021-12-21 15:17:57,538 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2264 transitions. [2021-12-21 15:17:57,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2264 transitions. [2021-12-21 15:17:57,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:57,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2264 transitions. [2021-12-21 15:17:57,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 94.33333333333333) internal successors, (2264), 24 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:57,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 124.0) internal successors, (3100), 25 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:57,542 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 124.0) internal successors, (3100), 25 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:57,543 INFO L186 Difference]: Start difference. First operand has 236 places, 197 transitions, 2218 flow. Second operand 24 states and 2264 transitions. [2021-12-21 15:17:57,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 296 transitions, 2896 flow [2021-12-21 15:17:57,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 296 transitions, 2814 flow, removed 25 selfloop flow, removed 4 redundant places. [2021-12-21 15:17:57,566 INFO L242 Difference]: Finished difference. Result has 273 places, 227 transitions, 2453 flow [2021-12-21 15:17:57,567 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2453, PETRI_PLACES=273, PETRI_TRANSITIONS=227} [2021-12-21 15:17:57,567 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 161 predicate places. [2021-12-21 15:17:57,567 INFO L470 AbstractCegarLoop]: Abstraction has has 273 places, 227 transitions, 2453 flow [2021-12-21 15:17:57,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:57,567 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:57,567 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:57,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-21 15:17:57,568 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:57,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:57,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1827326326, now seen corresponding path program 2 times [2021-12-21 15:17:57,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:57,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528770068] [2021-12-21 15:17:57,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:57,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:57,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:57,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528770068] [2021-12-21 15:17:57,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528770068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:57,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:57,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:17:57,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170761920] [2021-12-21 15:17:57,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:57,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:17:57,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:57,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:17:57,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:17:57,644 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 124 [2021-12-21 15:17:57,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 227 transitions, 2453 flow. Second operand has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:57,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:57,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 124 [2021-12-21 15:17:57,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:58,254 INFO L129 PetriNetUnfolder]: 1054/3159 cut-off events. [2021-12-21 15:17:58,254 INFO L130 PetriNetUnfolder]: For 7566/7733 co-relation queries the response was YES. [2021-12-21 15:17:58,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11080 conditions, 3159 events. 1054/3159 cut-off events. For 7566/7733 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 30567 event pairs, 341 based on Foata normal form. 9/3084 useless extension candidates. Maximal degree in co-relation 11010. Up to 1034 conditions per place. [2021-12-21 15:17:58,289 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 110 selfloop transitions, 39 changer transitions 31/323 dead transitions. [2021-12-21 15:17:58,289 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 323 transitions, 3247 flow [2021-12-21 15:17:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 15:17:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-21 15:17:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2264 transitions. [2021-12-21 15:17:58,290 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.760752688172043 [2021-12-21 15:17:58,290 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2264 transitions. [2021-12-21 15:17:58,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2264 transitions. [2021-12-21 15:17:58,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:58,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2264 transitions. [2021-12-21 15:17:58,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 94.33333333333333) internal successors, (2264), 24 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:58,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 124.0) internal successors, (3100), 25 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:58,295 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 124.0) internal successors, (3100), 25 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:58,295 INFO L186 Difference]: Start difference. First operand has 273 places, 227 transitions, 2453 flow. Second operand 24 states and 2264 transitions. [2021-12-21 15:17:58,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 323 transitions, 3247 flow [2021-12-21 15:17:58,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 323 transitions, 3117 flow, removed 53 selfloop flow, removed 4 redundant places. [2021-12-21 15:17:58,346 INFO L242 Difference]: Finished difference. Result has 308 places, 252 transitions, 2668 flow [2021-12-21 15:17:58,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2329, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2668, PETRI_PLACES=308, PETRI_TRANSITIONS=252} [2021-12-21 15:17:58,346 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 196 predicate places. [2021-12-21 15:17:58,347 INFO L470 AbstractCegarLoop]: Abstraction has has 308 places, 252 transitions, 2668 flow [2021-12-21 15:17:58,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:58,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:58,347 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:58,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-21 15:17:58,347 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:58,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1246184228, now seen corresponding path program 2 times [2021-12-21 15:17:58,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:58,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457467399] [2021-12-21 15:17:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:58,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:58,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:58,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457467399] [2021-12-21 15:17:58,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457467399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:58,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:58,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:17:58,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623620539] [2021-12-21 15:17:58,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:58,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:17:58,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:58,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:17:58,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:17:58,408 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 124 [2021-12-21 15:17:58,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 252 transitions, 2668 flow. Second operand has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:58,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:58,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 124 [2021-12-21 15:17:58,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:59,117 INFO L129 PetriNetUnfolder]: 1259/3678 cut-off events. [2021-12-21 15:17:59,117 INFO L130 PetriNetUnfolder]: For 11747/11905 co-relation queries the response was YES. [2021-12-21 15:17:59,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14022 conditions, 3678 events. 1259/3678 cut-off events. For 11747/11905 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 36740 event pairs, 454 based on Foata normal form. 2/3580 useless extension candidates. Maximal degree in co-relation 13937. Up to 1631 conditions per place. [2021-12-21 15:17:59,165 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 122 selfloop transitions, 45 changer transitions 24/334 dead transitions. [2021-12-21 15:17:59,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 334 transitions, 3592 flow [2021-12-21 15:17:59,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:17:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:17:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2071 transitions. [2021-12-21 15:17:59,167 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7591642228739003 [2021-12-21 15:17:59,167 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2071 transitions. [2021-12-21 15:17:59,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2071 transitions. [2021-12-21 15:17:59,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:59,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2071 transitions. [2021-12-21 15:17:59,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 94.13636363636364) internal successors, (2071), 22 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:59,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:59,171 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:59,171 INFO L186 Difference]: Start difference. First operand has 308 places, 252 transitions, 2668 flow. Second operand 22 states and 2071 transitions. [2021-12-21 15:17:59,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 334 transitions, 3592 flow [2021-12-21 15:17:59,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 334 transitions, 3412 flow, removed 44 selfloop flow, removed 10 redundant places. [2021-12-21 15:17:59,259 INFO L242 Difference]: Finished difference. Result has 331 places, 283 transitions, 2937 flow [2021-12-21 15:17:59,260 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2937, PETRI_PLACES=331, PETRI_TRANSITIONS=283} [2021-12-21 15:17:59,260 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 219 predicate places. [2021-12-21 15:17:59,260 INFO L470 AbstractCegarLoop]: Abstraction has has 331 places, 283 transitions, 2937 flow [2021-12-21 15:17:59,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:59,260 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:59,260 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:59,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-21 15:17:59,260 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:17:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:59,261 INFO L85 PathProgramCache]: Analyzing trace with hash 493663876, now seen corresponding path program 3 times [2021-12-21 15:17:59,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:59,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337441565] [2021-12-21 15:17:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:59,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:59,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:59,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337441565] [2021-12-21 15:17:59,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337441565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:59,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:59,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:17:59,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914655428] [2021-12-21 15:17:59,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:59,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:17:59,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:59,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:17:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:17:59,325 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 124 [2021-12-21 15:17:59,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 283 transitions, 2937 flow. Second operand has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:59,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:59,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 124 [2021-12-21 15:17:59,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:00,087 INFO L129 PetriNetUnfolder]: 1401/4001 cut-off events. [2021-12-21 15:18:00,088 INFO L130 PetriNetUnfolder]: For 15591/15755 co-relation queries the response was YES. [2021-12-21 15:18:00,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15828 conditions, 4001 events. 1401/4001 cut-off events. For 15591/15755 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 40099 event pairs, 466 based on Foata normal form. 3/3901 useless extension candidates. Maximal degree in co-relation 15734. Up to 1693 conditions per place. [2021-12-21 15:18:00,141 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 140 selfloop transitions, 54 changer transitions 16/353 dead transitions. [2021-12-21 15:18:00,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 353 transitions, 3851 flow [2021-12-21 15:18:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 15:18:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-21 15:18:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1517 transitions. [2021-12-21 15:18:00,143 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764616935483871 [2021-12-21 15:18:00,143 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1517 transitions. [2021-12-21 15:18:00,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1517 transitions. [2021-12-21 15:18:00,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:00,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1517 transitions. [2021-12-21 15:18:00,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.8125) internal successors, (1517), 16 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:00,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:00,146 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:00,146 INFO L186 Difference]: Start difference. First operand has 331 places, 283 transitions, 2937 flow. Second operand 16 states and 1517 transitions. [2021-12-21 15:18:00,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 353 transitions, 3851 flow [2021-12-21 15:18:00,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 353 transitions, 3689 flow, removed 81 selfloop flow, removed 2 redundant places. [2021-12-21 15:18:00,266 INFO L242 Difference]: Finished difference. Result has 352 places, 305 transitions, 3218 flow [2021-12-21 15:18:00,267 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2791, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3218, PETRI_PLACES=352, PETRI_TRANSITIONS=305} [2021-12-21 15:18:00,267 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 240 predicate places. [2021-12-21 15:18:00,267 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 305 transitions, 3218 flow [2021-12-21 15:18:00,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:00,267 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:00,267 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:00,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-21 15:18:00,268 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:18:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:00,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1716812918, now seen corresponding path program 4 times [2021-12-21 15:18:00,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:00,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511626504] [2021-12-21 15:18:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:00,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:00,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:00,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511626504] [2021-12-21 15:18:00,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511626504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:00,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:00,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:18:00,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921636681] [2021-12-21 15:18:00,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:00,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:18:00,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:00,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:18:00,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:18:00,343 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 124 [2021-12-21 15:18:00,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 305 transitions, 3218 flow. Second operand has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:00,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:00,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 124 [2021-12-21 15:18:00,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:01,274 INFO L129 PetriNetUnfolder]: 1499/4320 cut-off events. [2021-12-21 15:18:01,274 INFO L130 PetriNetUnfolder]: For 19063/19230 co-relation queries the response was YES. [2021-12-21 15:18:01,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17817 conditions, 4320 events. 1499/4320 cut-off events. For 19063/19230 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 44332 event pairs, 428 based on Foata normal form. 6/4226 useless extension candidates. Maximal degree in co-relation 17714. Up to 1423 conditions per place. [2021-12-21 15:18:01,328 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 159 selfloop transitions, 79 changer transitions 26/407 dead transitions. [2021-12-21 15:18:01,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 407 transitions, 4454 flow [2021-12-21 15:18:01,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 15:18:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-21 15:18:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2261 transitions. [2021-12-21 15:18:01,330 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.759744623655914 [2021-12-21 15:18:01,330 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2261 transitions. [2021-12-21 15:18:01,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2261 transitions. [2021-12-21 15:18:01,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:01,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2261 transitions. [2021-12-21 15:18:01,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 94.20833333333333) internal successors, (2261), 24 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:01,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 124.0) internal successors, (3100), 25 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:01,334 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 124.0) internal successors, (3100), 25 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:01,334 INFO L186 Difference]: Start difference. First operand has 352 places, 305 transitions, 3218 flow. Second operand 24 states and 2261 transitions. [2021-12-21 15:18:01,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 407 transitions, 4454 flow [2021-12-21 15:18:01,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 407 transitions, 4116 flow, removed 143 selfloop flow, removed 5 redundant places. [2021-12-21 15:18:01,482 INFO L242 Difference]: Finished difference. Result has 387 places, 331 transitions, 3497 flow [2021-12-21 15:18:01,482 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2973, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3497, PETRI_PLACES=387, PETRI_TRANSITIONS=331} [2021-12-21 15:18:01,482 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 275 predicate places. [2021-12-21 15:18:01,483 INFO L470 AbstractCegarLoop]: Abstraction has has 387 places, 331 transitions, 3497 flow [2021-12-21 15:18:01,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:01,483 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:01,483 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:01,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-21 15:18:01,483 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:18:01,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:01,483 INFO L85 PathProgramCache]: Analyzing trace with hash -871431556, now seen corresponding path program 5 times [2021-12-21 15:18:01,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:01,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553359633] [2021-12-21 15:18:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:01,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:01,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:01,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553359633] [2021-12-21 15:18:01,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553359633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:01,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:01,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:18:01,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582669266] [2021-12-21 15:18:01,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:01,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:18:01,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:01,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:18:01,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:18:01,553 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 124 [2021-12-21 15:18:01,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 331 transitions, 3497 flow. Second operand has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:01,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:01,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 124 [2021-12-21 15:18:01,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:02,460 INFO L129 PetriNetUnfolder]: 1557/4567 cut-off events. [2021-12-21 15:18:02,460 INFO L130 PetriNetUnfolder]: For 20699/20866 co-relation queries the response was YES. [2021-12-21 15:18:02,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19265 conditions, 4567 events. 1557/4567 cut-off events. For 20699/20866 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 47999 event pairs, 502 based on Foata normal form. 8/4459 useless extension candidates. Maximal degree in co-relation 19147. Up to 1961 conditions per place. [2021-12-21 15:18:02,535 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 156 selfloop transitions, 72 changer transitions 14/385 dead transitions. [2021-12-21 15:18:02,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 385 transitions, 4503 flow [2021-12-21 15:18:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 15:18:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-21 15:18:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2021-12-21 15:18:02,537 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7631048387096774 [2021-12-21 15:18:02,537 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2021-12-21 15:18:02,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2021-12-21 15:18:02,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:02,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2021-12-21 15:18:02,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:02,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:02,540 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:02,540 INFO L186 Difference]: Start difference. First operand has 387 places, 331 transitions, 3497 flow. Second operand 16 states and 1514 transitions. [2021-12-21 15:18:02,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 385 transitions, 4503 flow [2021-12-21 15:18:02,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 385 transitions, 4443 flow, removed 27 selfloop flow, removed 3 redundant places. [2021-12-21 15:18:02,681 INFO L242 Difference]: Finished difference. Result has 405 places, 348 transitions, 3861 flow [2021-12-21 15:18:02,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=3440, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3861, PETRI_PLACES=405, PETRI_TRANSITIONS=348} [2021-12-21 15:18:02,682 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 293 predicate places. [2021-12-21 15:18:02,682 INFO L470 AbstractCegarLoop]: Abstraction has has 405 places, 348 transitions, 3861 flow [2021-12-21 15:18:02,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:02,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:02,682 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:02,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-21 15:18:02,682 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:18:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:02,683 INFO L85 PathProgramCache]: Analyzing trace with hash -203294644, now seen corresponding path program 6 times [2021-12-21 15:18:02,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:02,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825327185] [2021-12-21 15:18:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:02,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:02,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:02,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825327185] [2021-12-21 15:18:02,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825327185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:02,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:02,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:18:02,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397251953] [2021-12-21 15:18:02,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:02,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:18:02,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:18:02,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:18:02,777 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 124 [2021-12-21 15:18:02,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 348 transitions, 3861 flow. Second operand has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:02,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:02,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 124 [2021-12-21 15:18:02,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:03,894 INFO L129 PetriNetUnfolder]: 1814/5340 cut-off events. [2021-12-21 15:18:03,894 INFO L130 PetriNetUnfolder]: For 37678/37845 co-relation queries the response was YES. [2021-12-21 15:18:03,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24619 conditions, 5340 events. 1814/5340 cut-off events. For 37678/37845 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 57768 event pairs, 572 based on Foata normal form. 4/5222 useless extension candidates. Maximal degree in co-relation 24495. Up to 1958 conditions per place. [2021-12-21 15:18:03,977 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 187 selfloop transitions, 74 changer transitions 22/426 dead transitions. [2021-12-21 15:18:03,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 426 transitions, 5372 flow [2021-12-21 15:18:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:18:03,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:18:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1889 transitions. [2021-12-21 15:18:03,979 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7616935483870968 [2021-12-21 15:18:03,979 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1889 transitions. [2021-12-21 15:18:03,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1889 transitions. [2021-12-21 15:18:03,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:03,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1889 transitions. [2021-12-21 15:18:03,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.45) internal successors, (1889), 20 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:03,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 124.0) internal successors, (2604), 21 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:03,983 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 124.0) internal successors, (2604), 21 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:03,983 INFO L186 Difference]: Start difference. First operand has 405 places, 348 transitions, 3861 flow. Second operand 20 states and 1889 transitions. [2021-12-21 15:18:03,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 426 transitions, 5372 flow [2021-12-21 15:18:04,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 426 transitions, 5228 flow, removed 58 selfloop flow, removed 3 redundant places. [2021-12-21 15:18:04,186 INFO L242 Difference]: Finished difference. Result has 434 places, 381 transitions, 4580 flow [2021-12-21 15:18:04,187 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=3760, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4580, PETRI_PLACES=434, PETRI_TRANSITIONS=381} [2021-12-21 15:18:04,187 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 322 predicate places. [2021-12-21 15:18:04,187 INFO L470 AbstractCegarLoop]: Abstraction has has 434 places, 381 transitions, 4580 flow [2021-12-21 15:18:04,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:04,187 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:04,187 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:04,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-21 15:18:04,188 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:18:04,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:04,188 INFO L85 PathProgramCache]: Analyzing trace with hash -466981080, now seen corresponding path program 7 times [2021-12-21 15:18:04,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:04,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383286320] [2021-12-21 15:18:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:04,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:04,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:04,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383286320] [2021-12-21 15:18:04,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383286320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:04,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:04,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:18:04,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473383942] [2021-12-21 15:18:04,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:04,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:18:04,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:04,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:18:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:18:04,246 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 124 [2021-12-21 15:18:04,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 381 transitions, 4580 flow. Second operand has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:04,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:04,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 124 [2021-12-21 15:18:04,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:05,488 INFO L129 PetriNetUnfolder]: 1901/5615 cut-off events. [2021-12-21 15:18:05,488 INFO L130 PetriNetUnfolder]: For 50739/50919 co-relation queries the response was YES. [2021-12-21 15:18:05,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27968 conditions, 5615 events. 1901/5615 cut-off events. For 50739/50919 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 61886 event pairs, 544 based on Foata normal form. 4/5486 useless extension candidates. Maximal degree in co-relation 27831. Up to 2201 conditions per place. [2021-12-21 15:18:05,582 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 203 selfloop transitions, 91 changer transitions 19/456 dead transitions. [2021-12-21 15:18:05,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 456 transitions, 6177 flow [2021-12-21 15:18:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:18:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:18:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1885 transitions. [2021-12-21 15:18:05,584 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7600806451612904 [2021-12-21 15:18:05,584 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1885 transitions. [2021-12-21 15:18:05,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1885 transitions. [2021-12-21 15:18:05,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:05,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1885 transitions. [2021-12-21 15:18:05,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.25) internal successors, (1885), 20 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:05,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 124.0) internal successors, (2604), 21 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:05,588 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 124.0) internal successors, (2604), 21 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:05,588 INFO L186 Difference]: Start difference. First operand has 434 places, 381 transitions, 4580 flow. Second operand 20 states and 1885 transitions. [2021-12-21 15:18:05,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 456 transitions, 6177 flow [2021-12-21 15:18:05,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 456 transitions, 5715 flow, removed 231 selfloop flow, removed 2 redundant places. [2021-12-21 15:18:05,942 INFO L242 Difference]: Finished difference. Result has 464 places, 414 transitions, 5148 flow [2021-12-21 15:18:05,943 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=4296, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5148, PETRI_PLACES=464, PETRI_TRANSITIONS=414} [2021-12-21 15:18:05,943 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 352 predicate places. [2021-12-21 15:18:05,943 INFO L470 AbstractCegarLoop]: Abstraction has has 464 places, 414 transitions, 5148 flow [2021-12-21 15:18:05,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:05,944 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:05,944 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:05,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-21 15:18:05,944 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:18:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:05,944 INFO L85 PathProgramCache]: Analyzing trace with hash -2069386238, now seen corresponding path program 8 times [2021-12-21 15:18:05,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:05,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599465998] [2021-12-21 15:18:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:05,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:06,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:06,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599465998] [2021-12-21 15:18:06,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599465998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:06,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:06,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:18:06,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357327671] [2021-12-21 15:18:06,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:06,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:18:06,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:06,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:18:06,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:18:06,004 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 124 [2021-12-21 15:18:06,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 414 transitions, 5148 flow. Second operand has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:06,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:06,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 124 [2021-12-21 15:18:06,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:07,344 INFO L129 PetriNetUnfolder]: 1900/5624 cut-off events. [2021-12-21 15:18:07,344 INFO L130 PetriNetUnfolder]: For 45964/46167 co-relation queries the response was YES. [2021-12-21 15:18:07,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27980 conditions, 5624 events. 1900/5624 cut-off events. For 45964/46167 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 61629 event pairs, 522 based on Foata normal form. 14/5514 useless extension candidates. Maximal degree in co-relation 27829. Up to 2190 conditions per place. [2021-12-21 15:18:07,448 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 190 selfloop transitions, 107 changer transitions 23/463 dead transitions. [2021-12-21 15:18:07,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 463 transitions, 6407 flow [2021-12-21 15:18:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 15:18:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-21 15:18:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1699 transitions. [2021-12-21 15:18:07,464 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7612007168458781 [2021-12-21 15:18:07,464 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1699 transitions. [2021-12-21 15:18:07,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1699 transitions. [2021-12-21 15:18:07,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:07,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1699 transitions. [2021-12-21 15:18:07,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.38888888888889) internal successors, (1699), 18 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:07,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:07,467 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:07,467 INFO L186 Difference]: Start difference. First operand has 464 places, 414 transitions, 5148 flow. Second operand 18 states and 1699 transitions. [2021-12-21 15:18:07,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 463 transitions, 6407 flow [2021-12-21 15:18:07,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 463 transitions, 6061 flow, removed 173 selfloop flow, removed 2 redundant places. [2021-12-21 15:18:07,850 INFO L242 Difference]: Finished difference. Result has 484 places, 423 transitions, 5357 flow [2021-12-21 15:18:07,851 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=4938, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5357, PETRI_PLACES=484, PETRI_TRANSITIONS=423} [2021-12-21 15:18:07,851 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 372 predicate places. [2021-12-21 15:18:07,851 INFO L470 AbstractCegarLoop]: Abstraction has has 484 places, 423 transitions, 5357 flow [2021-12-21 15:18:07,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:07,852 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:07,852 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:07,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-21 15:18:07,852 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:18:07,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:07,852 INFO L85 PathProgramCache]: Analyzing trace with hash -6694178, now seen corresponding path program 9 times [2021-12-21 15:18:07,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:07,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426774492] [2021-12-21 15:18:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:07,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:07,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:07,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426774492] [2021-12-21 15:18:07,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426774492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:07,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:07,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:18:07,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873780696] [2021-12-21 15:18:07,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:07,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:18:07,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:07,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:18:07,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:18:07,914 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 124 [2021-12-21 15:18:07,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 423 transitions, 5357 flow. Second operand has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:07,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:07,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 124 [2021-12-21 15:18:07,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:09,288 INFO L129 PetriNetUnfolder]: 2022/5985 cut-off events. [2021-12-21 15:18:09,289 INFO L130 PetriNetUnfolder]: For 40196/40399 co-relation queries the response was YES. [2021-12-21 15:18:09,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29780 conditions, 5985 events. 2022/5985 cut-off events. For 40196/40399 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 66539 event pairs, 561 based on Foata normal form. 8/5857 useless extension candidates. Maximal degree in co-relation 29623. Up to 2284 conditions per place. [2021-12-21 15:18:09,395 INFO L132 encePairwiseOnDemand]: 111/124 looper letters, 220 selfloop transitions, 104 changer transitions 16/483 dead transitions. [2021-12-21 15:18:09,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 483 transitions, 6755 flow [2021-12-21 15:18:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 15:18:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-21 15:18:09,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1610 transitions. [2021-12-21 15:18:09,396 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7637571157495257 [2021-12-21 15:18:09,396 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1610 transitions. [2021-12-21 15:18:09,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1610 transitions. [2021-12-21 15:18:09,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:09,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1610 transitions. [2021-12-21 15:18:09,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.70588235294117) internal successors, (1610), 17 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:09,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:09,399 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:09,399 INFO L186 Difference]: Start difference. First operand has 484 places, 423 transitions, 5357 flow. Second operand 17 states and 1610 transitions. [2021-12-21 15:18:09,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 483 transitions, 6755 flow [2021-12-21 15:18:09,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 483 transitions, 6637 flow, removed 36 selfloop flow, removed 5 redundant places. [2021-12-21 15:18:09,708 INFO L242 Difference]: Finished difference. Result has 501 places, 445 transitions, 5945 flow [2021-12-21 15:18:09,708 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=5248, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5945, PETRI_PLACES=501, PETRI_TRANSITIONS=445} [2021-12-21 15:18:09,708 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 389 predicate places. [2021-12-21 15:18:09,708 INFO L470 AbstractCegarLoop]: Abstraction has has 501 places, 445 transitions, 5945 flow [2021-12-21 15:18:09,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:09,709 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:09,709 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:09,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-21 15:18:09,709 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:18:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1085284942, now seen corresponding path program 10 times [2021-12-21 15:18:09,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37289975] [2021-12-21 15:18:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:09,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:09,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:09,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37289975] [2021-12-21 15:18:09,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37289975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:09,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:09,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:18:09,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554904956] [2021-12-21 15:18:09,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:09,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:18:09,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:09,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:18:09,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:18:09,777 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 124 [2021-12-21 15:18:09,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 445 transitions, 5945 flow. Second operand has 10 states, 10 states have (on average 91.6) internal successors, (916), 10 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:09,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:09,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 124 [2021-12-21 15:18:09,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand