./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-sre-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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-symm.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 c361ebc03d879240d418527d643e8a7b3c7ac084ceb3e66857b21a687a1c7f90 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:42:51,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:42:51,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:42:51,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:42:51,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:42:51,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:42:51,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:42:51,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:42:51,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:42:51,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:42:51,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:42:51,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:42:51,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:42:51,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:42:51,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:42:51,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:42:51,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:42:51,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:42:51,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:42:51,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:42:51,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:42:51,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:42:51,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:42:51,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:42:51,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:42:51,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:42:51,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:42:51,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:42:51,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:42:51,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:42:51,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:42:51,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:42:51,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:42:51,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:42:51,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:42:51,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:42:51,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:42:51,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:42:51,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:42:51,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:42:51,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:42:51,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:42:51,706 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:42:51,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:42:51,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:42:51,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:42:51,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:42:51,708 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:42:51,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:42:51,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:42:51,708 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:42:51,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:42:51,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:42:51,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:42:51,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:42:51,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:42:51,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:42:51,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:42:51,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:42:51,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:42:51,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:42:51,711 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:42:51,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:42:51,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:42:51,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:42:51,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:42:51,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:42:51,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:42:51,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:42:51,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:42:51,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:42:51,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:42:51,712 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:42:51,712 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:42:51,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:42:51,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:42:51,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c361ebc03d879240d418527d643e8a7b3c7ac084ceb3e66857b21a687a1c7f90 [2021-12-22 13:42:51,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:42:51,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:42:51,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:42:51,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:42:51,921 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:42:51,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-sre-symm.wvr.c [2021-12-22 13:42:51,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47b60de15/7f7da114b1d5407f87b40a8668354aed/FLAG50b6b8ff6 [2021-12-22 13:42:52,344 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:42:52,344 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-sre-symm.wvr.c [2021-12-22 13:42:52,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47b60de15/7f7da114b1d5407f87b40a8668354aed/FLAG50b6b8ff6 [2021-12-22 13:42:52,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47b60de15/7f7da114b1d5407f87b40a8668354aed [2021-12-22 13:42:52,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:42:52,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:42:52,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:42:52,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:42:52,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:42:52,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:42:52" (1/1) ... [2021-12-22 13:42:52,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce10ef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52, skipping insertion in model container [2021-12-22 13:42:52,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:42:52" (1/1) ... [2021-12-22 13:42:52,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:42:52,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:42:52,518 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-symm.wvr.c[2133,2146] [2021-12-22 13:42:52,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:42:52,525 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:42:52,537 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-symm.wvr.c[2133,2146] [2021-12-22 13:42:52,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:42:52,546 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:42:52,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52 WrapperNode [2021-12-22 13:42:52,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:42:52,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:42:52,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:42:52,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:42:52,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52" (1/1) ... [2021-12-22 13:42:52,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52" (1/1) ... [2021-12-22 13:42:52,567 INFO L137 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 60 [2021-12-22 13:42:52,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:42:52,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:42:52,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:42:52,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:42:52,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52" (1/1) ... [2021-12-22 13:42:52,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52" (1/1) ... [2021-12-22 13:42:52,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52" (1/1) ... [2021-12-22 13:42:52,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52" (1/1) ... [2021-12-22 13:42:52,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52" (1/1) ... [2021-12-22 13:42:52,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52" (1/1) ... [2021-12-22 13:42:52,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52" (1/1) ... [2021-12-22 13:42:52,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:42:52,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:42:52,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:42:52,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:42:52,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52" (1/1) ... [2021-12-22 13:42:52,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:42:52,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:42:52,602 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) [2021-12-22 13:42:52,609 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 [2021-12-22 13:42:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:42:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:42:52,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:42:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:42:52,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:42:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:42:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:42:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:42:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:42:52,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:42:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:42:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:42:52,634 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:42:52,685 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:42:52,686 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:42:52,830 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:42:52,836 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:42:52,836 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 13:42:52,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:42:52 BoogieIcfgContainer [2021-12-22 13:42:52,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:42:52,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:42:52,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:42:52,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:42:52,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:42:52" (1/3) ... [2021-12-22 13:42:52,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24488275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:42:52, skipping insertion in model container [2021-12-22 13:42:52,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:52" (2/3) ... [2021-12-22 13:42:52,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24488275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:42:52, skipping insertion in model container [2021-12-22 13:42:52,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:42:52" (3/3) ... [2021-12-22 13:42:52,858 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-sre-symm.wvr.c [2021-12-22 13:42:52,861 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:42:52,861 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:42:52,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:42:52,862 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:42:52,896 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,896 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,897 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,897 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,897 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,897 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,897 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,898 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,898 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,898 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,898 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,898 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,898 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,900 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,900 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,914 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:52,921 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:42:52,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:42:52,969 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 [2021-12-22 13:42:52,969 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:42:52,980 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 102 places, 102 transitions, 220 flow [2021-12-22 13:42:53,034 INFO L129 PetriNetUnfolder]: 7/100 cut-off events. [2021-12-22 13:42:53,036 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:42:53,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 100 events. 7/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-22 13:42:53,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 102 transitions, 220 flow [2021-12-22 13:42:53,050 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 194 flow [2021-12-22 13:42:53,065 INFO L129 PetriNetUnfolder]: 7/90 cut-off events. [2021-12-22 13:42:53,066 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:42:53,066 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:53,067 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] [2021-12-22 13:42:53,067 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:53,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1122200234, now seen corresponding path program 1 times [2021-12-22 13:42:53,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:53,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420097233] [2021-12-22 13:42:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:53,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:53,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:53,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420097233] [2021-12-22 13:42:53,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420097233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:53,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:53,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:42:53,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908835874] [2021-12-22 13:42:53,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:53,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:42:53,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:53,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:42:53,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:42:53,425 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 102 [2021-12-22 13:42:53,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 194 flow. Second operand has 8 states, 8 states have (on average 72.0) internal successors, (576), 8 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:53,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:53,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 102 [2021-12-22 13:42:53,437 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:53,692 INFO L129 PetriNetUnfolder]: 55/294 cut-off events. [2021-12-22 13:42:53,693 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2021-12-22 13:42:53,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 294 events. 55/294 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1134 event pairs, 11 based on Foata normal form. 9/287 useless extension candidates. Maximal degree in co-relation 265. Up to 44 conditions per place. [2021-12-22 13:42:53,698 INFO L132 encePairwiseOnDemand]: 86/102 looper letters, 52 selfloop transitions, 10 changer transitions 34/155 dead transitions. [2021-12-22 13:42:53,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 155 transitions, 541 flow [2021-12-22 13:42:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:42:53,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-22 13:42:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1141 transitions. [2021-12-22 13:42:53,719 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7457516339869281 [2021-12-22 13:42:53,720 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1141 transitions. [2021-12-22 13:42:53,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1141 transitions. [2021-12-22 13:42:53,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:53,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1141 transitions. [2021-12-22 13:42:53,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 76.06666666666666) internal successors, (1141), 15 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:53,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 102.0) internal successors, (1632), 16 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:53,746 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 102.0) internal successors, (1632), 16 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:53,748 INFO L186 Difference]: Start difference. First operand has 91 places, 91 transitions, 194 flow. Second operand 15 states and 1141 transitions. [2021-12-22 13:42:53,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 155 transitions, 541 flow [2021-12-22 13:42:53,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 155 transitions, 515 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:42:53,753 INFO L242 Difference]: Finished difference. Result has 111 places, 93 transitions, 253 flow [2021-12-22 13:42:53,754 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=253, PETRI_PLACES=111, PETRI_TRANSITIONS=93} [2021-12-22 13:42:53,756 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 20 predicate places. [2021-12-22 13:42:53,757 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 93 transitions, 253 flow [2021-12-22 13:42:53,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.0) internal successors, (576), 8 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:53,757 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:53,757 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] [2021-12-22 13:42:53,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:42:53,757 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:53,758 INFO L85 PathProgramCache]: Analyzing trace with hash 697994717, now seen corresponding path program 1 times [2021-12-22 13:42:53,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:53,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001447383] [2021-12-22 13:42:53,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:53,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:53,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001447383] [2021-12-22 13:42:53,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001447383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:53,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:53,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:42:53,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521413821] [2021-12-22 13:42:53,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:53,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:42:53,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:53,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:42:53,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:42:53,841 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-22 13:42:53,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 93 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:53,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:53,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-22 13:42:53,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:53,895 INFO L129 PetriNetUnfolder]: 41/290 cut-off events. [2021-12-22 13:42:53,895 INFO L130 PetriNetUnfolder]: For 107/112 co-relation queries the response was YES. [2021-12-22 13:42:53,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 290 events. 41/290 cut-off events. For 107/112 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1157 event pairs, 13 based on Foata normal form. 2/262 useless extension candidates. Maximal degree in co-relation 482. Up to 52 conditions per place. [2021-12-22 13:42:53,899 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 18 selfloop transitions, 2 changer transitions 1/98 dead transitions. [2021-12-22 13:42:53,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 98 transitions, 308 flow [2021-12-22 13:42:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:42:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:42:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2021-12-22 13:42:53,900 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8790849673202614 [2021-12-22 13:42:53,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2021-12-22 13:42:53,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2021-12-22 13:42:53,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:53,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2021-12-22 13:42:53,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:53,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:53,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:53,903 INFO L186 Difference]: Start difference. First operand has 111 places, 93 transitions, 253 flow. Second operand 3 states and 269 transitions. [2021-12-22 13:42:53,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 98 transitions, 308 flow [2021-12-22 13:42:53,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 98 transitions, 297 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-12-22 13:42:53,909 INFO L242 Difference]: Finished difference. Result has 100 places, 95 transitions, 262 flow [2021-12-22 13:42:53,909 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2021-12-22 13:42:53,910 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 9 predicate places. [2021-12-22 13:42:53,910 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 262 flow [2021-12-22 13:42:53,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:53,910 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:53,910 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] [2021-12-22 13:42:53,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:42:53,911 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:53,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:53,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1049557055, now seen corresponding path program 2 times [2021-12-22 13:42:53,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:53,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121530235] [2021-12-22 13:42:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:53,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:53,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:53,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121530235] [2021-12-22 13:42:53,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121530235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:53,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:53,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:42:53,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069972129] [2021-12-22 13:42:53,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:53,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:42:53,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:53,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:42:53,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:42:53,990 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-22 13:42:53,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:53,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:53,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-22 13:42:53,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:54,032 INFO L129 PetriNetUnfolder]: 28/218 cut-off events. [2021-12-22 13:42:54,033 INFO L130 PetriNetUnfolder]: For 59/60 co-relation queries the response was YES. [2021-12-22 13:42:54,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 218 events. 28/218 cut-off events. For 59/60 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 701 event pairs, 16 based on Foata normal form. 3/202 useless extension candidates. Maximal degree in co-relation 313. Up to 46 conditions per place. [2021-12-22 13:42:54,034 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 16 selfloop transitions, 0 changer transitions 13/96 dead transitions. [2021-12-22 13:42:54,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 307 flow [2021-12-22 13:42:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:42:54,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:42:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2021-12-22 13:42:54,035 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8790849673202614 [2021-12-22 13:42:54,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2021-12-22 13:42:54,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2021-12-22 13:42:54,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:54,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2021-12-22 13:42:54,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:54,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:54,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:54,037 INFO L186 Difference]: Start difference. First operand has 100 places, 95 transitions, 262 flow. Second operand 3 states and 269 transitions. [2021-12-22 13:42:54,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 307 flow [2021-12-22 13:42:54,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 96 transitions, 300 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-22 13:42:54,040 INFO L242 Difference]: Finished difference. Result has 101 places, 83 transitions, 202 flow [2021-12-22 13:42:54,040 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2021-12-22 13:42:54,041 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 10 predicate places. [2021-12-22 13:42:54,041 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 202 flow [2021-12-22 13:42:54,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:54,042 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:54,042 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:54,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:42:54,042 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:54,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:54,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1224331634, now seen corresponding path program 1 times [2021-12-22 13:42:54,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:54,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013312898] [2021-12-22 13:42:54,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:54,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:54,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:54,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013312898] [2021-12-22 13:42:54,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013312898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:54,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:54,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:54,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365327293] [2021-12-22 13:42:54,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:54,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:54,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:54,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:54,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:54,182 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:54,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 202 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:54,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:54,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:54,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:54,472 INFO L129 PetriNetUnfolder]: 96/360 cut-off events. [2021-12-22 13:42:54,472 INFO L130 PetriNetUnfolder]: For 149/150 co-relation queries the response was YES. [2021-12-22 13:42:54,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 360 events. 96/360 cut-off events. For 149/150 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1563 event pairs, 35 based on Foata normal form. 1/353 useless extension candidates. Maximal degree in co-relation 744. Up to 112 conditions per place. [2021-12-22 13:42:54,474 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 75 selfloop transitions, 5 changer transitions 34/167 dead transitions. [2021-12-22 13:42:54,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 167 transitions, 697 flow [2021-12-22 13:42:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 13:42:54,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-22 13:42:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1627 transitions. [2021-12-22 13:42:54,478 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6646241830065359 [2021-12-22 13:42:54,478 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1627 transitions. [2021-12-22 13:42:54,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1627 transitions. [2021-12-22 13:42:54,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:54,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1627 transitions. [2021-12-22 13:42:54,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.79166666666667) internal successors, (1627), 24 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:54,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:54,486 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:54,486 INFO L186 Difference]: Start difference. First operand has 101 places, 83 transitions, 202 flow. Second operand 24 states and 1627 transitions. [2021-12-22 13:42:54,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 167 transitions, 697 flow [2021-12-22 13:42:54,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 167 transitions, 643 flow, removed 22 selfloop flow, removed 6 redundant places. [2021-12-22 13:42:54,490 INFO L242 Difference]: Finished difference. Result has 133 places, 87 transitions, 283 flow [2021-12-22 13:42:54,490 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=283, PETRI_PLACES=133, PETRI_TRANSITIONS=87} [2021-12-22 13:42:54,491 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 42 predicate places. [2021-12-22 13:42:54,491 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 87 transitions, 283 flow [2021-12-22 13:42:54,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:54,492 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:54,492 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:54,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:42:54,492 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:54,493 INFO L85 PathProgramCache]: Analyzing trace with hash -608647506, now seen corresponding path program 2 times [2021-12-22 13:42:54,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:54,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105252240] [2021-12-22 13:42:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:54,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:54,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:54,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105252240] [2021-12-22 13:42:54,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105252240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:54,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:54,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:54,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811914991] [2021-12-22 13:42:54,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:54,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:54,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:54,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:54,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:54,641 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:54,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 87 transitions, 283 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:54,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:54,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:54,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:54,964 INFO L129 PetriNetUnfolder]: 136/542 cut-off events. [2021-12-22 13:42:54,964 INFO L130 PetriNetUnfolder]: For 1421/1421 co-relation queries the response was YES. [2021-12-22 13:42:54,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1802 conditions, 542 events. 136/542 cut-off events. For 1421/1421 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2929 event pairs, 70 based on Foata normal form. 1/530 useless extension candidates. Maximal degree in co-relation 1773. Up to 193 conditions per place. [2021-12-22 13:42:54,968 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 98 selfloop transitions, 5 changer transitions 32/188 dead transitions. [2021-12-22 13:42:54,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 188 transitions, 1218 flow [2021-12-22 13:42:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 13:42:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-22 13:42:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1624 transitions. [2021-12-22 13:42:54,971 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2021-12-22 13:42:54,971 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1624 transitions. [2021-12-22 13:42:54,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1624 transitions. [2021-12-22 13:42:54,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:54,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1624 transitions. [2021-12-22 13:42:54,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.66666666666667) internal successors, (1624), 24 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:54,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:54,978 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:54,978 INFO L186 Difference]: Start difference. First operand has 133 places, 87 transitions, 283 flow. Second operand 24 states and 1624 transitions. [2021-12-22 13:42:54,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 188 transitions, 1218 flow [2021-12-22 13:42:54,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 188 transitions, 1110 flow, removed 51 selfloop flow, removed 11 redundant places. [2021-12-22 13:42:54,990 INFO L242 Difference]: Finished difference. Result has 150 places, 91 transitions, 369 flow [2021-12-22 13:42:54,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=369, PETRI_PLACES=150, PETRI_TRANSITIONS=91} [2021-12-22 13:42:54,993 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 59 predicate places. [2021-12-22 13:42:54,993 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 91 transitions, 369 flow [2021-12-22 13:42:54,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:54,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:54,994 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:54,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:42:54,994 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:54,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:54,995 INFO L85 PathProgramCache]: Analyzing trace with hash 64807340, now seen corresponding path program 1 times [2021-12-22 13:42:54,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:54,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049040919] [2021-12-22 13:42:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:54,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:55,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:55,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049040919] [2021-12-22 13:42:55,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049040919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:55,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:55,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:42:55,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565429145] [2021-12-22 13:42:55,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:55,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:42:55,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:55,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:42:55,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:42:55,063 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-22 13:42:55,064 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 91 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:55,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-22 13:42:55,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:55,118 INFO L129 PetriNetUnfolder]: 50/382 cut-off events. [2021-12-22 13:42:55,118 INFO L130 PetriNetUnfolder]: For 1729/1779 co-relation queries the response was YES. [2021-12-22 13:42:55,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1209 conditions, 382 events. 50/382 cut-off events. For 1729/1779 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1821 event pairs, 37 based on Foata normal form. 12/368 useless extension candidates. Maximal degree in co-relation 1168. Up to 43 conditions per place. [2021-12-22 13:42:55,122 INFO L132 encePairwiseOnDemand]: 94/102 looper letters, 18 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2021-12-22 13:42:55,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 100 transitions, 445 flow [2021-12-22 13:42:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:42:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-22 13:42:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2021-12-22 13:42:55,123 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8676470588235294 [2021-12-22 13:42:55,123 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2021-12-22 13:42:55,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2021-12-22 13:42:55,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:55,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2021-12-22 13:42:55,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,126 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,126 INFO L186 Difference]: Start difference. First operand has 150 places, 91 transitions, 369 flow. Second operand 4 states and 354 transitions. [2021-12-22 13:42:55,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 100 transitions, 445 flow [2021-12-22 13:42:55,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 100 transitions, 418 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-12-22 13:42:55,135 INFO L242 Difference]: Finished difference. Result has 126 places, 93 transitions, 376 flow [2021-12-22 13:42:55,135 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=376, PETRI_PLACES=126, PETRI_TRANSITIONS=93} [2021-12-22 13:42:55,136 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 35 predicate places. [2021-12-22 13:42:55,136 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 93 transitions, 376 flow [2021-12-22 13:42:55,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,136 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:55,137 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:55,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:42:55,137 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:55,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1076099432, now seen corresponding path program 3 times [2021-12-22 13:42:55,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:55,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854938046] [2021-12-22 13:42:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:55,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:55,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:55,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854938046] [2021-12-22 13:42:55,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854938046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:55,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:55,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:55,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368525215] [2021-12-22 13:42:55,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:55,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:55,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:55,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:55,239 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:55,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 93 transitions, 376 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:55,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:55,239 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:55,239 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:55,520 INFO L129 PetriNetUnfolder]: 148/593 cut-off events. [2021-12-22 13:42:55,521 INFO L130 PetriNetUnfolder]: For 2118/2119 co-relation queries the response was YES. [2021-12-22 13:42:55,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2269 conditions, 593 events. 148/593 cut-off events. For 2118/2119 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3316 event pairs, 92 based on Foata normal form. 1/581 useless extension candidates. Maximal degree in co-relation 2237. Up to 270 conditions per place. [2021-12-22 13:42:55,526 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 58 selfloop transitions, 12 changer transitions 25/150 dead transitions. [2021-12-22 13:42:55,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 150 transitions, 1101 flow [2021-12-22 13:42:55,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:42:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:42:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1348 transitions. [2021-12-22 13:42:55,529 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6607843137254902 [2021-12-22 13:42:55,529 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1348 transitions. [2021-12-22 13:42:55,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1348 transitions. [2021-12-22 13:42:55,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:55,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1348 transitions. [2021-12-22 13:42:55,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.4) internal successors, (1348), 20 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,534 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,535 INFO L186 Difference]: Start difference. First operand has 126 places, 93 transitions, 376 flow. Second operand 20 states and 1348 transitions. [2021-12-22 13:42:55,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 150 transitions, 1101 flow [2021-12-22 13:42:55,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 150 transitions, 1095 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-22 13:42:55,542 INFO L242 Difference]: Finished difference. Result has 160 places, 103 transitions, 559 flow [2021-12-22 13:42:55,543 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=559, PETRI_PLACES=160, PETRI_TRANSITIONS=103} [2021-12-22 13:42:55,543 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 69 predicate places. [2021-12-22 13:42:55,543 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 103 transitions, 559 flow [2021-12-22 13:42:55,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:55,544 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:55,544 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:55,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:42:55,545 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 247999428, now seen corresponding path program 1 times [2021-12-22 13:42:55,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:55,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064340884] [2021-12-22 13:42:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:55,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:55,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:55,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064340884] [2021-12-22 13:42:55,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064340884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:55,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:55,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:42:55,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692649952] [2021-12-22 13:42:55,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:55,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:42:55,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:55,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:42:55,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:42:55,577 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-22 13:42:55,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 103 transitions, 559 flow. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:55,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-22 13:42:55,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:55,635 INFO L129 PetriNetUnfolder]: 61/441 cut-off events. [2021-12-22 13:42:55,635 INFO L130 PetriNetUnfolder]: For 2390/2422 co-relation queries the response was YES. [2021-12-22 13:42:55,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1626 conditions, 441 events. 61/441 cut-off events. For 2390/2422 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2352 event pairs, 46 based on Foata normal form. 13/435 useless extension candidates. Maximal degree in co-relation 1577. Up to 53 conditions per place. [2021-12-22 13:42:55,639 INFO L132 encePairwiseOnDemand]: 97/102 looper letters, 23 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2021-12-22 13:42:55,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 112 transitions, 644 flow [2021-12-22 13:42:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:42:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-22 13:42:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2021-12-22 13:42:55,640 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8676470588235294 [2021-12-22 13:42:55,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2021-12-22 13:42:55,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2021-12-22 13:42:55,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:55,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2021-12-22 13:42:55,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,642 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,642 INFO L186 Difference]: Start difference. First operand has 160 places, 103 transitions, 559 flow. Second operand 4 states and 354 transitions. [2021-12-22 13:42:55,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 112 transitions, 644 flow [2021-12-22 13:42:55,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 112 transitions, 579 flow, removed 29 selfloop flow, removed 10 redundant places. [2021-12-22 13:42:55,650 INFO L242 Difference]: Finished difference. Result has 143 places, 105 transitions, 520 flow [2021-12-22 13:42:55,651 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=520, PETRI_PLACES=143, PETRI_TRANSITIONS=105} [2021-12-22 13:42:55,651 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 52 predicate places. [2021-12-22 13:42:55,651 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 105 transitions, 520 flow [2021-12-22 13:42:55,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,652 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:55,652 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:55,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:42:55,652 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:55,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:55,653 INFO L85 PathProgramCache]: Analyzing trace with hash -4862106, now seen corresponding path program 2 times [2021-12-22 13:42:55,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:55,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792089977] [2021-12-22 13:42:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:55,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:55,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:55,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792089977] [2021-12-22 13:42:55,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792089977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:55,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:55,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:42:55,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222577143] [2021-12-22 13:42:55,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:55,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:42:55,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:55,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:42:55,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:42:55,697 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-22 13:42:55,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 105 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:55,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-22 13:42:55,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:55,751 INFO L129 PetriNetUnfolder]: 48/375 cut-off events. [2021-12-22 13:42:55,751 INFO L130 PetriNetUnfolder]: For 1504/1531 co-relation queries the response was YES. [2021-12-22 13:42:55,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 375 events. 48/375 cut-off events. For 1504/1531 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1830 event pairs, 32 based on Foata normal form. 12/370 useless extension candidates. Maximal degree in co-relation 1204. Up to 43 conditions per place. [2021-12-22 13:42:55,754 INFO L132 encePairwiseOnDemand]: 97/102 looper letters, 23 selfloop transitions, 6 changer transitions 0/114 dead transitions. [2021-12-22 13:42:55,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 114 transitions, 608 flow [2021-12-22 13:42:55,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:42:55,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:42:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 438 transitions. [2021-12-22 13:42:55,755 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8588235294117647 [2021-12-22 13:42:55,755 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 438 transitions. [2021-12-22 13:42:55,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 438 transitions. [2021-12-22 13:42:55,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:55,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 438 transitions. [2021-12-22 13:42:55,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,758 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,758 INFO L186 Difference]: Start difference. First operand has 143 places, 105 transitions, 520 flow. Second operand 5 states and 438 transitions. [2021-12-22 13:42:55,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 114 transitions, 608 flow [2021-12-22 13:42:55,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 114 transitions, 592 flow, removed 7 selfloop flow, removed 1 redundant places. [2021-12-22 13:42:55,764 INFO L242 Difference]: Finished difference. Result has 148 places, 107 transitions, 536 flow [2021-12-22 13:42:55,764 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=148, PETRI_TRANSITIONS=107} [2021-12-22 13:42:55,764 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 57 predicate places. [2021-12-22 13:42:55,764 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 107 transitions, 536 flow [2021-12-22 13:42:55,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:55,765 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:55,765 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:55,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:42:55,765 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:55,766 INFO L85 PathProgramCache]: Analyzing trace with hash -384437336, now seen corresponding path program 1 times [2021-12-22 13:42:55,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:55,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522945061] [2021-12-22 13:42:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:55,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:55,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:55,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522945061] [2021-12-22 13:42:55,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522945061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:55,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:55,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:55,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048976007] [2021-12-22 13:42:55,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:55,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:55,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:55,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:55,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:55,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:55,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 107 transitions, 536 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:55,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:55,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:55,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:56,133 INFO L129 PetriNetUnfolder]: 121/532 cut-off events. [2021-12-22 13:42:56,133 INFO L130 PetriNetUnfolder]: For 2482/2489 co-relation queries the response was YES. [2021-12-22 13:42:56,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2142 conditions, 532 events. 121/532 cut-off events. For 2482/2489 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2890 event pairs, 66 based on Foata normal form. 1/525 useless extension candidates. Maximal degree in co-relation 2098. Up to 228 conditions per place. [2021-12-22 13:42:56,138 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 81 selfloop transitions, 5 changer transitions 41/186 dead transitions. [2021-12-22 13:42:56,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 186 transitions, 1365 flow [2021-12-22 13:42:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 13:42:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-22 13:42:56,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1626 transitions. [2021-12-22 13:42:56,140 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6642156862745098 [2021-12-22 13:42:56,140 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1626 transitions. [2021-12-22 13:42:56,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1626 transitions. [2021-12-22 13:42:56,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:56,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1626 transitions. [2021-12-22 13:42:56,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.75) internal successors, (1626), 24 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,146 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,147 INFO L186 Difference]: Start difference. First operand has 148 places, 107 transitions, 536 flow. Second operand 24 states and 1626 transitions. [2021-12-22 13:42:56,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 186 transitions, 1365 flow [2021-12-22 13:42:56,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 186 transitions, 1353 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-22 13:42:56,175 INFO L242 Difference]: Finished difference. Result has 187 places, 107 transitions, 575 flow [2021-12-22 13:42:56,175 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=575, PETRI_PLACES=187, PETRI_TRANSITIONS=107} [2021-12-22 13:42:56,175 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 96 predicate places. [2021-12-22 13:42:56,176 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 107 transitions, 575 flow [2021-12-22 13:42:56,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:56,176 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:56,176 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] [2021-12-22 13:42:56,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:42:56,177 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1633904260, now seen corresponding path program 2 times [2021-12-22 13:42:56,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:56,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937202288] [2021-12-22 13:42:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:56,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:56,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:56,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937202288] [2021-12-22 13:42:56,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937202288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:56,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:56,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:56,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399822897] [2021-12-22 13:42:56,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:56,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:56,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:56,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:56,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:56,262 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:56,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 107 transitions, 575 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:56,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:56,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:56,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:56,498 INFO L129 PetriNetUnfolder]: 129/555 cut-off events. [2021-12-22 13:42:56,498 INFO L130 PetriNetUnfolder]: For 4770/4778 co-relation queries the response was YES. [2021-12-22 13:42:56,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2728 conditions, 555 events. 129/555 cut-off events. For 4770/4778 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3027 event pairs, 77 based on Foata normal form. 1/545 useless extension candidates. Maximal degree in co-relation 2666. Up to 268 conditions per place. [2021-12-22 13:42:56,504 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 63 selfloop transitions, 12 changer transitions 29/163 dead transitions. [2021-12-22 13:42:56,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 163 transitions, 1484 flow [2021-12-22 13:42:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:42:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:42:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2021-12-22 13:42:56,506 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6622549019607843 [2021-12-22 13:42:56,506 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2021-12-22 13:42:56,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2021-12-22 13:42:56,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:56,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2021-12-22 13:42:56,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.55) internal successors, (1351), 20 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,513 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,513 INFO L186 Difference]: Start difference. First operand has 187 places, 107 transitions, 575 flow. Second operand 20 states and 1351 transitions. [2021-12-22 13:42:56,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 163 transitions, 1484 flow [2021-12-22 13:42:56,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 163 transitions, 1212 flow, removed 98 selfloop flow, removed 22 redundant places. [2021-12-22 13:42:56,525 INFO L242 Difference]: Finished difference. Result has 184 places, 117 transitions, 717 flow [2021-12-22 13:42:56,525 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=717, PETRI_PLACES=184, PETRI_TRANSITIONS=117} [2021-12-22 13:42:56,525 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 93 predicate places. [2021-12-22 13:42:56,526 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 117 transitions, 717 flow [2021-12-22 13:42:56,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:56,526 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:56,526 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:56,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:42:56,527 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:56,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:56,527 INFO L85 PathProgramCache]: Analyzing trace with hash 263114164, now seen corresponding path program 2 times [2021-12-22 13:42:56,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:56,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965466870] [2021-12-22 13:42:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:56,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:56,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:56,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965466870] [2021-12-22 13:42:56,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965466870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:56,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:56,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:42:56,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678881171] [2021-12-22 13:42:56,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:56,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:42:56,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:56,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:42:56,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:42:56,576 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-22 13:42:56,576 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 117 transitions, 717 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:56,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-22 13:42:56,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:56,640 INFO L129 PetriNetUnfolder]: 49/346 cut-off events. [2021-12-22 13:42:56,640 INFO L130 PetriNetUnfolder]: For 2048/2055 co-relation queries the response was YES. [2021-12-22 13:42:56,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 346 events. 49/346 cut-off events. For 2048/2055 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1689 event pairs, 29 based on Foata normal form. 6/336 useless extension candidates. Maximal degree in co-relation 1306. Up to 44 conditions per place. [2021-12-22 13:42:56,643 INFO L132 encePairwiseOnDemand]: 95/102 looper letters, 21 selfloop transitions, 8 changer transitions 0/124 dead transitions. [2021-12-22 13:42:56,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 124 transitions, 803 flow [2021-12-22 13:42:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:42:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:42:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 436 transitions. [2021-12-22 13:42:56,644 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8549019607843137 [2021-12-22 13:42:56,644 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 436 transitions. [2021-12-22 13:42:56,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 436 transitions. [2021-12-22 13:42:56,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:56,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 436 transitions. [2021-12-22 13:42:56,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,645 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,646 INFO L186 Difference]: Start difference. First operand has 184 places, 117 transitions, 717 flow. Second operand 5 states and 436 transitions. [2021-12-22 13:42:56,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 124 transitions, 803 flow [2021-12-22 13:42:56,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 124 transitions, 688 flow, removed 54 selfloop flow, removed 11 redundant places. [2021-12-22 13:42:56,653 INFO L242 Difference]: Finished difference. Result has 167 places, 119 transitions, 644 flow [2021-12-22 13:42:56,653 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=644, PETRI_PLACES=167, PETRI_TRANSITIONS=119} [2021-12-22 13:42:56,654 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 76 predicate places. [2021-12-22 13:42:56,654 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 119 transitions, 644 flow [2021-12-22 13:42:56,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,654 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:56,654 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:56,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:42:56,654 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:56,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1922867324, now seen corresponding path program 4 times [2021-12-22 13:42:56,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:56,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113535678] [2021-12-22 13:42:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:56,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:56,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:56,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113535678] [2021-12-22 13:42:56,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113535678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:56,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:56,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:56,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587534349] [2021-12-22 13:42:56,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:56,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:56,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:56,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:56,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:56,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:56,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 119 transitions, 644 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:56,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:56,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:56,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:56,989 INFO L129 PetriNetUnfolder]: 109/470 cut-off events. [2021-12-22 13:42:56,989 INFO L130 PetriNetUnfolder]: For 1903/1914 co-relation queries the response was YES. [2021-12-22 13:42:56,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 470 events. 109/470 cut-off events. For 1903/1914 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2410 event pairs, 59 based on Foata normal form. 1/463 useless extension candidates. Maximal degree in co-relation 1883. Up to 189 conditions per place. [2021-12-22 13:42:56,993 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 72 selfloop transitions, 15 changer transitions 26/174 dead transitions. [2021-12-22 13:42:56,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 174 transitions, 1305 flow [2021-12-22 13:42:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 13:42:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-22 13:42:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1414 transitions. [2021-12-22 13:42:56,995 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6601307189542484 [2021-12-22 13:42:56,995 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1414 transitions. [2021-12-22 13:42:56,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1414 transitions. [2021-12-22 13:42:56,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:56,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1414 transitions. [2021-12-22 13:42:56,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.33333333333333) internal successors, (1414), 21 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,999 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:56,999 INFO L186 Difference]: Start difference. First operand has 167 places, 119 transitions, 644 flow. Second operand 21 states and 1414 transitions. [2021-12-22 13:42:56,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 174 transitions, 1305 flow [2021-12-22 13:42:57,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 174 transitions, 1281 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-12-22 13:42:57,020 INFO L242 Difference]: Finished difference. Result has 195 places, 130 transitions, 811 flow [2021-12-22 13:42:57,021 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=811, PETRI_PLACES=195, PETRI_TRANSITIONS=130} [2021-12-22 13:42:57,021 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 104 predicate places. [2021-12-22 13:42:57,021 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 130 transitions, 811 flow [2021-12-22 13:42:57,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:57,021 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:57,021 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:57,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:42:57,022 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:57,022 INFO L85 PathProgramCache]: Analyzing trace with hash 253627028, now seen corresponding path program 3 times [2021-12-22 13:42:57,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:57,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264913648] [2021-12-22 13:42:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:57,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:57,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:57,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264913648] [2021-12-22 13:42:57,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264913648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:57,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:57,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:57,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2403143] [2021-12-22 13:42:57,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:57,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:57,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:57,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:57,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:57,106 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:57,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 130 transitions, 811 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:57,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:57,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:57,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:57,369 INFO L129 PetriNetUnfolder]: 111/499 cut-off events. [2021-12-22 13:42:57,369 INFO L130 PetriNetUnfolder]: For 2705/2719 co-relation queries the response was YES. [2021-12-22 13:42:57,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 499 events. 111/499 cut-off events. For 2705/2719 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2670 event pairs, 51 based on Foata normal form. 1/492 useless extension candidates. Maximal degree in co-relation 2198. Up to 213 conditions per place. [2021-12-22 13:42:57,374 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 82 selfloop transitions, 14 changer transitions 32/189 dead transitions. [2021-12-22 13:42:57,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 189 transitions, 1611 flow [2021-12-22 13:42:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:42:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:42:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1355 transitions. [2021-12-22 13:42:57,376 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6642156862745098 [2021-12-22 13:42:57,376 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1355 transitions. [2021-12-22 13:42:57,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1355 transitions. [2021-12-22 13:42:57,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:57,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1355 transitions. [2021-12-22 13:42:57,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.75) internal successors, (1355), 20 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:57,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:57,381 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:57,381 INFO L186 Difference]: Start difference. First operand has 195 places, 130 transitions, 811 flow. Second operand 20 states and 1355 transitions. [2021-12-22 13:42:57,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 189 transitions, 1611 flow [2021-12-22 13:42:57,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 189 transitions, 1571 flow, removed 20 selfloop flow, removed 10 redundant places. [2021-12-22 13:42:57,393 INFO L242 Difference]: Finished difference. Result has 208 places, 140 transitions, 976 flow [2021-12-22 13:42:57,393 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=976, PETRI_PLACES=208, PETRI_TRANSITIONS=140} [2021-12-22 13:42:57,393 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 117 predicate places. [2021-12-22 13:42:57,393 INFO L470 AbstractCegarLoop]: Abstraction has has 208 places, 140 transitions, 976 flow [2021-12-22 13:42:57,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:57,394 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:57,394 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:57,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:42:57,394 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1761379566, now seen corresponding path program 4 times [2021-12-22 13:42:57,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:57,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572484454] [2021-12-22 13:42:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:57,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:57,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:57,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572484454] [2021-12-22 13:42:57,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572484454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:57,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:57,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:57,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501485117] [2021-12-22 13:42:57,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:57,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:57,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:57,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:57,477 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:57,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 140 transitions, 976 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:57,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:57,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:57,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:57,783 INFO L129 PetriNetUnfolder]: 108/506 cut-off events. [2021-12-22 13:42:57,783 INFO L130 PetriNetUnfolder]: For 3315/3332 co-relation queries the response was YES. [2021-12-22 13:42:57,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 506 events. 108/506 cut-off events. For 3315/3332 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2794 event pairs, 42 based on Foata normal form. 1/500 useless extension candidates. Maximal degree in co-relation 2331. Up to 176 conditions per place. [2021-12-22 13:42:57,788 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 103 selfloop transitions, 15 changer transitions 42/221 dead transitions. [2021-12-22 13:42:57,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 221 transitions, 2119 flow [2021-12-22 13:42:57,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 13:42:57,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-22 13:42:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1623 transitions. [2021-12-22 13:42:57,790 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6629901960784313 [2021-12-22 13:42:57,790 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1623 transitions. [2021-12-22 13:42:57,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1623 transitions. [2021-12-22 13:42:57,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:57,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1623 transitions. [2021-12-22 13:42:57,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.625) internal successors, (1623), 24 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:57,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:57,795 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:57,795 INFO L186 Difference]: Start difference. First operand has 208 places, 140 transitions, 976 flow. Second operand 24 states and 1623 transitions. [2021-12-22 13:42:57,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 221 transitions, 2119 flow [2021-12-22 13:42:57,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 221 transitions, 1791 flow, removed 157 selfloop flow, removed 13 redundant places. [2021-12-22 13:42:57,808 INFO L242 Difference]: Finished difference. Result has 224 places, 140 transitions, 951 flow [2021-12-22 13:42:57,808 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=951, PETRI_PLACES=224, PETRI_TRANSITIONS=140} [2021-12-22 13:42:57,808 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 133 predicate places. [2021-12-22 13:42:57,809 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 140 transitions, 951 flow [2021-12-22 13:42:57,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:57,809 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:57,809 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:57,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:42:57,810 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1592848106, now seen corresponding path program 5 times [2021-12-22 13:42:57,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:57,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141900577] [2021-12-22 13:42:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:57,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:57,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:57,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141900577] [2021-12-22 13:42:57,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141900577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:57,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:57,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:57,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913105068] [2021-12-22 13:42:57,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:57,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:57,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:57,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:57,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:57,907 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:57,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 140 transitions, 951 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:57,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:57,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:57,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:58,183 INFO L129 PetriNetUnfolder]: 120/557 cut-off events. [2021-12-22 13:42:58,184 INFO L130 PetriNetUnfolder]: For 3132/3144 co-relation queries the response was YES. [2021-12-22 13:42:58,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2552 conditions, 557 events. 120/557 cut-off events. For 3132/3144 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3221 event pairs, 50 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 2474. Up to 227 conditions per place. [2021-12-22 13:42:58,189 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 88 selfloop transitions, 23 changer transitions 33/205 dead transitions. [2021-12-22 13:42:58,189 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 205 transitions, 1908 flow [2021-12-22 13:42:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:42:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-22 13:42:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1482 transitions. [2021-12-22 13:42:58,193 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.660427807486631 [2021-12-22 13:42:58,193 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1482 transitions. [2021-12-22 13:42:58,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1482 transitions. [2021-12-22 13:42:58,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:58,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1482 transitions. [2021-12-22 13:42:58,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.36363636363636) internal successors, (1482), 22 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:58,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:58,199 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:58,200 INFO L186 Difference]: Start difference. First operand has 224 places, 140 transitions, 951 flow. Second operand 22 states and 1482 transitions. [2021-12-22 13:42:58,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 205 transitions, 1908 flow [2021-12-22 13:42:58,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 205 transitions, 1706 flow, removed 40 selfloop flow, removed 23 redundant places. [2021-12-22 13:42:58,213 INFO L242 Difference]: Finished difference. Result has 220 places, 151 transitions, 1076 flow [2021-12-22 13:42:58,213 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1076, PETRI_PLACES=220, PETRI_TRANSITIONS=151} [2021-12-22 13:42:58,213 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 129 predicate places. [2021-12-22 13:42:58,213 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 151 transitions, 1076 flow [2021-12-22 13:42:58,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:58,214 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:58,214 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:58,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:42:58,214 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:58,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1895668264, now seen corresponding path program 6 times [2021-12-22 13:42:58,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:58,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107251850] [2021-12-22 13:42:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:58,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:58,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:58,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107251850] [2021-12-22 13:42:58,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107251850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:58,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:58,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:58,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134597562] [2021-12-22 13:42:58,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:58,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:58,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:58,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:58,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:58,302 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:58,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 151 transitions, 1076 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:58,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:58,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:58,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:58,567 INFO L129 PetriNetUnfolder]: 116/530 cut-off events. [2021-12-22 13:42:58,568 INFO L130 PetriNetUnfolder]: For 2946/2966 co-relation queries the response was YES. [2021-12-22 13:42:58,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2429 conditions, 530 events. 116/530 cut-off events. For 2946/2966 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2989 event pairs, 52 based on Foata normal form. 4/527 useless extension candidates. Maximal degree in co-relation 2354. Up to 223 conditions per place. [2021-12-22 13:42:58,574 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 85 selfloop transitions, 23 changer transitions 34/203 dead transitions. [2021-12-22 13:42:58,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 203 transitions, 1920 flow [2021-12-22 13:42:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 13:42:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-22 13:42:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1421 transitions. [2021-12-22 13:42:58,588 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2021-12-22 13:42:58,588 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1421 transitions. [2021-12-22 13:42:58,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1421 transitions. [2021-12-22 13:42:58,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:58,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1421 transitions. [2021-12-22 13:42:58,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.66666666666667) internal successors, (1421), 21 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:58,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:58,592 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:58,592 INFO L186 Difference]: Start difference. First operand has 220 places, 151 transitions, 1076 flow. Second operand 21 states and 1421 transitions. [2021-12-22 13:42:58,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 203 transitions, 1920 flow [2021-12-22 13:42:58,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 203 transitions, 1768 flow, removed 69 selfloop flow, removed 12 redundant places. [2021-12-22 13:42:58,604 INFO L242 Difference]: Finished difference. Result has 230 places, 155 transitions, 1179 flow [2021-12-22 13:42:58,604 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1179, PETRI_PLACES=230, PETRI_TRANSITIONS=155} [2021-12-22 13:42:58,605 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 139 predicate places. [2021-12-22 13:42:58,605 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 155 transitions, 1179 flow [2021-12-22 13:42:58,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:58,605 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:58,605 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:58,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:42:58,605 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:58,605 INFO L85 PathProgramCache]: Analyzing trace with hash 676415914, now seen corresponding path program 7 times [2021-12-22 13:42:58,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:58,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764246531] [2021-12-22 13:42:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:58,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:58,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:58,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764246531] [2021-12-22 13:42:58,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764246531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:58,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:58,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:58,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870184243] [2021-12-22 13:42:58,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:58,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:58,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:58,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:58,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:58,679 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:58,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 155 transitions, 1179 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:58,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:58,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:58,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:58,871 INFO L129 PetriNetUnfolder]: 109/514 cut-off events. [2021-12-22 13:42:58,871 INFO L130 PetriNetUnfolder]: For 3038/3064 co-relation queries the response was YES. [2021-12-22 13:42:58,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2394 conditions, 514 events. 109/514 cut-off events. For 3038/3064 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2908 event pairs, 51 based on Foata normal form. 7/513 useless extension candidates. Maximal degree in co-relation 2314. Up to 233 conditions per place. [2021-12-22 13:42:58,876 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 84 selfloop transitions, 26 changer transitions 27/198 dead transitions. [2021-12-22 13:42:58,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 198 transitions, 1923 flow [2021-12-22 13:42:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:42:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-22 13:42:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1088 transitions. [2021-12-22 13:42:58,877 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2021-12-22 13:42:58,877 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1088 transitions. [2021-12-22 13:42:58,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1088 transitions. [2021-12-22 13:42:58,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:58,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1088 transitions. [2021-12-22 13:42:58,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 68.0) internal successors, (1088), 16 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:58,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:58,880 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:58,880 INFO L186 Difference]: Start difference. First operand has 230 places, 155 transitions, 1179 flow. Second operand 16 states and 1088 transitions. [2021-12-22 13:42:58,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 198 transitions, 1923 flow [2021-12-22 13:42:58,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 198 transitions, 1769 flow, removed 58 selfloop flow, removed 15 redundant places. [2021-12-22 13:42:58,903 INFO L242 Difference]: Finished difference. Result has 226 places, 160 transitions, 1237 flow [2021-12-22 13:42:58,904 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1237, PETRI_PLACES=226, PETRI_TRANSITIONS=160} [2021-12-22 13:42:58,904 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 135 predicate places. [2021-12-22 13:42:58,904 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 160 transitions, 1237 flow [2021-12-22 13:42:58,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:58,904 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:58,905 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:58,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:42:58,905 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1617779906, now seen corresponding path program 8 times [2021-12-22 13:42:58,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:58,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522351281] [2021-12-22 13:42:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:58,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:58,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:58,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522351281] [2021-12-22 13:42:58,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522351281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:58,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:58,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:58,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199971545] [2021-12-22 13:42:58,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:58,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:58,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:58,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:58,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:58,977 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:58,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 160 transitions, 1237 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:58,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:58,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:58,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:59,175 INFO L129 PetriNetUnfolder]: 100/495 cut-off events. [2021-12-22 13:42:59,175 INFO L130 PetriNetUnfolder]: For 2413/2435 co-relation queries the response was YES. [2021-12-22 13:42:59,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2186 conditions, 495 events. 100/495 cut-off events. For 2413/2435 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2718 event pairs, 46 based on Foata normal form. 3/492 useless extension candidates. Maximal degree in co-relation 2110. Up to 221 conditions per place. [2021-12-22 13:42:59,180 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 80 selfloop transitions, 14 changer transitions 35/190 dead transitions. [2021-12-22 13:42:59,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 190 transitions, 1741 flow [2021-12-22 13:42:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:42:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:42:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1213 transitions. [2021-12-22 13:42:59,182 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6606753812636166 [2021-12-22 13:42:59,182 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1213 transitions. [2021-12-22 13:42:59,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1213 transitions. [2021-12-22 13:42:59,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:59,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1213 transitions. [2021-12-22 13:42:59,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.38888888888889) internal successors, (1213), 18 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:59,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:59,185 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:59,185 INFO L186 Difference]: Start difference. First operand has 226 places, 160 transitions, 1237 flow. Second operand 18 states and 1213 transitions. [2021-12-22 13:42:59,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 190 transitions, 1741 flow [2021-12-22 13:42:59,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 190 transitions, 1617 flow, removed 36 selfloop flow, removed 10 redundant places. [2021-12-22 13:42:59,198 INFO L242 Difference]: Finished difference. Result has 233 places, 145 transitions, 1002 flow [2021-12-22 13:42:59,198 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1002, PETRI_PLACES=233, PETRI_TRANSITIONS=145} [2021-12-22 13:42:59,198 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 142 predicate places. [2021-12-22 13:42:59,198 INFO L470 AbstractCegarLoop]: Abstraction has has 233 places, 145 transitions, 1002 flow [2021-12-22 13:42:59,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:59,199 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:59,199 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:59,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:42:59,199 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:59,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:59,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1072737310, now seen corresponding path program 9 times [2021-12-22 13:42:59,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:59,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901054665] [2021-12-22 13:42:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:59,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:59,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:59,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901054665] [2021-12-22 13:42:59,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901054665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:59,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:59,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:59,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531006652] [2021-12-22 13:42:59,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:59,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:59,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:59,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:59,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:59,284 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:59,284 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 145 transitions, 1002 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:59,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:59,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:59,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:59,514 INFO L129 PetriNetUnfolder]: 102/489 cut-off events. [2021-12-22 13:42:59,514 INFO L130 PetriNetUnfolder]: For 2460/2480 co-relation queries the response was YES. [2021-12-22 13:42:59,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 489 events. 102/489 cut-off events. For 2460/2480 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2649 event pairs, 52 based on Foata normal form. 3/484 useless extension candidates. Maximal degree in co-relation 2124. Up to 221 conditions per place. [2021-12-22 13:42:59,518 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 77 selfloop transitions, 22 changer transitions 25/185 dead transitions. [2021-12-22 13:42:59,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 185 transitions, 1679 flow [2021-12-22 13:42:59,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:42:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:42:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1219 transitions. [2021-12-22 13:42:59,520 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6639433551198257 [2021-12-22 13:42:59,520 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1219 transitions. [2021-12-22 13:42:59,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1219 transitions. [2021-12-22 13:42:59,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:59,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1219 transitions. [2021-12-22 13:42:59,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.72222222222223) internal successors, (1219), 18 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:59,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:59,524 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:59,524 INFO L186 Difference]: Start difference. First operand has 233 places, 145 transitions, 1002 flow. Second operand 18 states and 1219 transitions. [2021-12-22 13:42:59,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 185 transitions, 1679 flow [2021-12-22 13:42:59,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 185 transitions, 1532 flow, removed 27 selfloop flow, removed 18 redundant places. [2021-12-22 13:42:59,536 INFO L242 Difference]: Finished difference. Result has 218 places, 154 transitions, 1123 flow [2021-12-22 13:42:59,536 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1123, PETRI_PLACES=218, PETRI_TRANSITIONS=154} [2021-12-22 13:42:59,537 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 127 predicate places. [2021-12-22 13:42:59,537 INFO L470 AbstractCegarLoop]: Abstraction has has 218 places, 154 transitions, 1123 flow [2021-12-22 13:42:59,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:59,537 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:59,537 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:59,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:42:59,538 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:59,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash 924402576, now seen corresponding path program 10 times [2021-12-22 13:42:59,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:59,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669833242] [2021-12-22 13:42:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:59,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:59,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:59,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669833242] [2021-12-22 13:42:59,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669833242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:59,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:59,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:59,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772810229] [2021-12-22 13:42:59,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:59,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:59,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:59,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:59,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:59,617 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:59,618 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 154 transitions, 1123 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:59,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:59,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:59,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:42:59,830 INFO L129 PetriNetUnfolder]: 99/491 cut-off events. [2021-12-22 13:42:59,830 INFO L130 PetriNetUnfolder]: For 2137/2157 co-relation queries the response was YES. [2021-12-22 13:42:59,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2133 conditions, 491 events. 99/491 cut-off events. For 2137/2157 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2694 event pairs, 49 based on Foata normal form. 3/487 useless extension candidates. Maximal degree in co-relation 2061. Up to 221 conditions per place. [2021-12-22 13:42:59,834 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 78 selfloop transitions, 24 changer transitions 26/189 dead transitions. [2021-12-22 13:42:59,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 189 transitions, 1734 flow [2021-12-22 13:42:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:42:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:42:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1155 transitions. [2021-12-22 13:42:59,836 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6660899653979239 [2021-12-22 13:42:59,836 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1155 transitions. [2021-12-22 13:42:59,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1155 transitions. [2021-12-22 13:42:59,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:42:59,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1155 transitions. [2021-12-22 13:42:59,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.94117647058823) internal successors, (1155), 17 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:59,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:59,839 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:42:59,839 INFO L186 Difference]: Start difference. First operand has 218 places, 154 transitions, 1123 flow. Second operand 17 states and 1155 transitions. [2021-12-22 13:42:59,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 189 transitions, 1734 flow [2021-12-22 13:42:59,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 189 transitions, 1649 flow, removed 37 selfloop flow, removed 5 redundant places. [2021-12-22 13:42:59,850 INFO L242 Difference]: Finished difference. Result has 230 places, 158 transitions, 1210 flow [2021-12-22 13:42:59,850 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1210, PETRI_PLACES=230, PETRI_TRANSITIONS=158} [2021-12-22 13:42:59,851 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 139 predicate places. [2021-12-22 13:42:59,851 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 158 transitions, 1210 flow [2021-12-22 13:42:59,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:59,851 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:59,851 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:59,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:42:59,852 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash -291420918, now seen corresponding path program 11 times [2021-12-22 13:42:59,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:59,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678969407] [2021-12-22 13:42:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:59,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:42:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:42:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:42:59,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:42:59,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678969407] [2021-12-22 13:42:59,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678969407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:42:59,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:42:59,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:42:59,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247377071] [2021-12-22 13:42:59,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:42:59,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:42:59,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:42:59,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:42:59,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:42:59,929 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:42:59,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 158 transitions, 1210 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:42:59,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:42:59,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:42:59,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:00,130 INFO L129 PetriNetUnfolder]: 96/491 cut-off events. [2021-12-22 13:43:00,131 INFO L130 PetriNetUnfolder]: For 2180/2196 co-relation queries the response was YES. [2021-12-22 13:43:00,134 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2118 conditions, 491 events. 96/491 cut-off events. For 2180/2196 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2691 event pairs, 51 based on Foata normal form. 1/485 useless extension candidates. Maximal degree in co-relation 2040. Up to 221 conditions per place. [2021-12-22 13:43:00,135 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 78 selfloop transitions, 14 changer transitions 34/187 dead transitions. [2021-12-22 13:43:00,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 187 transitions, 1712 flow [2021-12-22 13:43:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:43:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:43:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1154 transitions. [2021-12-22 13:43:00,137 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6655132641291811 [2021-12-22 13:43:00,137 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1154 transitions. [2021-12-22 13:43:00,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1154 transitions. [2021-12-22 13:43:00,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:00,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1154 transitions. [2021-12-22 13:43:00,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.88235294117646) internal successors, (1154), 17 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,140 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,141 INFO L186 Difference]: Start difference. First operand has 230 places, 158 transitions, 1210 flow. Second operand 17 states and 1154 transitions. [2021-12-22 13:43:00,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 187 transitions, 1712 flow [2021-12-22 13:43:00,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 187 transitions, 1617 flow, removed 26 selfloop flow, removed 8 redundant places. [2021-12-22 13:43:00,152 INFO L242 Difference]: Finished difference. Result has 237 places, 149 transitions, 1058 flow [2021-12-22 13:43:00,152 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1058, PETRI_PLACES=237, PETRI_TRANSITIONS=149} [2021-12-22 13:43:00,152 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 146 predicate places. [2021-12-22 13:43:00,153 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 149 transitions, 1058 flow [2021-12-22 13:43:00,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:00,153 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:00,153 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:00,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:43:00,153 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:00,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:00,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1407903128, now seen corresponding path program 12 times [2021-12-22 13:43:00,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:00,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115810651] [2021-12-22 13:43:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:00,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:00,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:00,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115810651] [2021-12-22 13:43:00,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115810651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:00,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:00,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:00,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420564432] [2021-12-22 13:43:00,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:00,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:00,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:00,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:00,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 149 transitions, 1058 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:00,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:00,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:00,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:00,441 INFO L129 PetriNetUnfolder]: 86/442 cut-off events. [2021-12-22 13:43:00,442 INFO L130 PetriNetUnfolder]: For 2053/2073 co-relation queries the response was YES. [2021-12-22 13:43:00,444 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 442 events. 86/442 cut-off events. For 2053/2073 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2273 event pairs, 46 based on Foata normal form. 3/439 useless extension candidates. Maximal degree in co-relation 1806. Up to 208 conditions per place. [2021-12-22 13:43:00,445 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 68 selfloop transitions, 3 changer transitions 37/169 dead transitions. [2021-12-22 13:43:00,445 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 169 transitions, 1414 flow [2021-12-22 13:43:00,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:43:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:43:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1209 transitions. [2021-12-22 13:43:00,447 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6584967320261438 [2021-12-22 13:43:00,447 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1209 transitions. [2021-12-22 13:43:00,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1209 transitions. [2021-12-22 13:43:00,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:00,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1209 transitions. [2021-12-22 13:43:00,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.16666666666667) internal successors, (1209), 18 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,450 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,450 INFO L186 Difference]: Start difference. First operand has 237 places, 149 transitions, 1058 flow. Second operand 18 states and 1209 transitions. [2021-12-22 13:43:00,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 169 transitions, 1414 flow [2021-12-22 13:43:00,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 169 transitions, 1298 flow, removed 27 selfloop flow, removed 21 redundant places. [2021-12-22 13:43:00,459 INFO L242 Difference]: Finished difference. Result has 222 places, 129 transitions, 775 flow [2021-12-22 13:43:00,459 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=775, PETRI_PLACES=222, PETRI_TRANSITIONS=129} [2021-12-22 13:43:00,459 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 131 predicate places. [2021-12-22 13:43:00,460 INFO L470 AbstractCegarLoop]: Abstraction has has 222 places, 129 transitions, 775 flow [2021-12-22 13:43:00,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:00,460 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:00,460 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:00,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:43:00,460 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash -502599450, now seen corresponding path program 13 times [2021-12-22 13:43:00,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:00,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291924560] [2021-12-22 13:43:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:00,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:00,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:00,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291924560] [2021-12-22 13:43:00,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291924560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:00,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:00,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:00,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198268192] [2021-12-22 13:43:00,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:00,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:00,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:00,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:00,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:00,533 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:00,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 129 transitions, 775 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:00,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:00,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:00,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:00,818 INFO L129 PetriNetUnfolder]: 91/461 cut-off events. [2021-12-22 13:43:00,818 INFO L130 PetriNetUnfolder]: For 2005/2016 co-relation queries the response was YES. [2021-12-22 13:43:00,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1902 conditions, 461 events. 91/461 cut-off events. For 2005/2016 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2402 event pairs, 42 based on Foata normal form. 1/458 useless extension candidates. Maximal degree in co-relation 1831. Up to 188 conditions per place. [2021-12-22 13:43:00,822 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 74 selfloop transitions, 19 changer transitions 32/186 dead transitions. [2021-12-22 13:43:00,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 186 transitions, 1578 flow [2021-12-22 13:43:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:43:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-22 13:43:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1479 transitions. [2021-12-22 13:43:00,824 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2021-12-22 13:43:00,824 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1479 transitions. [2021-12-22 13:43:00,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1479 transitions. [2021-12-22 13:43:00,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:00,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1479 transitions. [2021-12-22 13:43:00,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.22727272727273) internal successors, (1479), 22 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,828 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,828 INFO L186 Difference]: Start difference. First operand has 222 places, 129 transitions, 775 flow. Second operand 22 states and 1479 transitions. [2021-12-22 13:43:00,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 186 transitions, 1578 flow [2021-12-22 13:43:00,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 186 transitions, 1367 flow, removed 33 selfloop flow, removed 24 redundant places. [2021-12-22 13:43:00,835 INFO L242 Difference]: Finished difference. Result has 205 places, 140 transitions, 896 flow [2021-12-22 13:43:00,836 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=896, PETRI_PLACES=205, PETRI_TRANSITIONS=140} [2021-12-22 13:43:00,836 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 114 predicate places. [2021-12-22 13:43:00,836 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 140 transitions, 896 flow [2021-12-22 13:43:00,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:00,836 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:00,836 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:00,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 13:43:00,837 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:00,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1322045660, now seen corresponding path program 14 times [2021-12-22 13:43:00,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:00,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027939518] [2021-12-22 13:43:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:00,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:00,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:00,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027939518] [2021-12-22 13:43:00,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027939518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:00,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:00,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:00,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051335970] [2021-12-22 13:43:00,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:00,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:00,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:00,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:00,919 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:00,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 140 transitions, 896 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:00,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:00,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:00,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:01,217 INFO L129 PetriNetUnfolder]: 88/449 cut-off events. [2021-12-22 13:43:01,217 INFO L130 PetriNetUnfolder]: For 1753/1764 co-relation queries the response was YES. [2021-12-22 13:43:01,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 449 events. 88/449 cut-off events. For 1753/1764 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2325 event pairs, 43 based on Foata normal form. 1/445 useless extension candidates. Maximal degree in co-relation 1810. Up to 186 conditions per place. [2021-12-22 13:43:01,221 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 70 selfloop transitions, 21 changer transitions 32/184 dead transitions. [2021-12-22 13:43:01,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 184 transitions, 1566 flow [2021-12-22 13:43:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 13:43:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-22 13:43:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1413 transitions. [2021-12-22 13:43:01,222 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6596638655462185 [2021-12-22 13:43:01,222 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1413 transitions. [2021-12-22 13:43:01,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1413 transitions. [2021-12-22 13:43:01,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:01,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1413 transitions. [2021-12-22 13:43:01,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.28571428571429) internal successors, (1413), 21 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,226 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,226 INFO L186 Difference]: Start difference. First operand has 205 places, 140 transitions, 896 flow. Second operand 21 states and 1413 transitions. [2021-12-22 13:43:01,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 184 transitions, 1566 flow [2021-12-22 13:43:01,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 184 transitions, 1422 flow, removed 66 selfloop flow, removed 11 redundant places. [2021-12-22 13:43:01,234 INFO L242 Difference]: Finished difference. Result has 214 places, 142 transitions, 959 flow [2021-12-22 13:43:01,234 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=959, PETRI_PLACES=214, PETRI_TRANSITIONS=142} [2021-12-22 13:43:01,234 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 123 predicate places. [2021-12-22 13:43:01,234 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 142 transitions, 959 flow [2021-12-22 13:43:01,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:01,234 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:01,234 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:01,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 13:43:01,235 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:01,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:01,235 INFO L85 PathProgramCache]: Analyzing trace with hash -562411640, now seen corresponding path program 15 times [2021-12-22 13:43:01,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:01,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279165590] [2021-12-22 13:43:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:01,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:01,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:01,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279165590] [2021-12-22 13:43:01,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279165590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:01,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:01,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:01,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443150494] [2021-12-22 13:43:01,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:01,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:01,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:01,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:01,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:01,312 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:01,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 142 transitions, 959 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:01,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:01,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:01,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:01,495 INFO L129 PetriNetUnfolder]: 85/448 cut-off events. [2021-12-22 13:43:01,496 INFO L130 PetriNetUnfolder]: For 1992/2003 co-relation queries the response was YES. [2021-12-22 13:43:01,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 448 events. 85/448 cut-off events. For 1992/2003 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2311 event pairs, 40 based on Foata normal form. 1/444 useless extension candidates. Maximal degree in co-relation 1835. Up to 191 conditions per place. [2021-12-22 13:43:01,500 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 70 selfloop transitions, 22 changer transitions 29/182 dead transitions. [2021-12-22 13:43:01,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 182 transitions, 1569 flow [2021-12-22 13:43:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:43:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-22 13:43:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1090 transitions. [2021-12-22 13:43:01,501 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6678921568627451 [2021-12-22 13:43:01,501 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1090 transitions. [2021-12-22 13:43:01,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1090 transitions. [2021-12-22 13:43:01,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:01,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1090 transitions. [2021-12-22 13:43:01,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 68.125) internal successors, (1090), 16 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,504 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,504 INFO L186 Difference]: Start difference. First operand has 214 places, 142 transitions, 959 flow. Second operand 16 states and 1090 transitions. [2021-12-22 13:43:01,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 182 transitions, 1569 flow [2021-12-22 13:43:01,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 182 transitions, 1412 flow, removed 53 selfloop flow, removed 18 redundant places. [2021-12-22 13:43:01,512 INFO L242 Difference]: Finished difference. Result has 207 places, 147 transitions, 1000 flow [2021-12-22 13:43:01,512 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1000, PETRI_PLACES=207, PETRI_TRANSITIONS=147} [2021-12-22 13:43:01,512 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 116 predicate places. [2021-12-22 13:43:01,512 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 147 transitions, 1000 flow [2021-12-22 13:43:01,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:01,513 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:01,513 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:01,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 13:43:01,513 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:01,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:01,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1822556410, now seen corresponding path program 16 times [2021-12-22 13:43:01,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:01,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415596022] [2021-12-22 13:43:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:01,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:01,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:01,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415596022] [2021-12-22 13:43:01,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415596022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:01,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:01,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:01,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129529425] [2021-12-22 13:43:01,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:01,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:01,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:01,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:01,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:01,594 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:01,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 147 transitions, 1000 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:01,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:01,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:01,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:01,811 INFO L129 PetriNetUnfolder]: 76/414 cut-off events. [2021-12-22 13:43:01,812 INFO L130 PetriNetUnfolder]: For 1533/1544 co-relation queries the response was YES. [2021-12-22 13:43:01,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 414 events. 76/414 cut-off events. For 1533/1544 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2061 event pairs, 40 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 1640. Up to 185 conditions per place. [2021-12-22 13:43:01,815 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 66 selfloop transitions, 10 changer transitions 34/171 dead transitions. [2021-12-22 13:43:01,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 171 transitions, 1379 flow [2021-12-22 13:43:01,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:43:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:43:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1212 transitions. [2021-12-22 13:43:01,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6601307189542484 [2021-12-22 13:43:01,819 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1212 transitions. [2021-12-22 13:43:01,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1212 transitions. [2021-12-22 13:43:01,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:01,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1212 transitions. [2021-12-22 13:43:01,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.33333333333333) internal successors, (1212), 18 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,822 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,822 INFO L186 Difference]: Start difference. First operand has 207 places, 147 transitions, 1000 flow. Second operand 18 states and 1212 transitions. [2021-12-22 13:43:01,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 171 transitions, 1379 flow [2021-12-22 13:43:01,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 171 transitions, 1275 flow, removed 30 selfloop flow, removed 10 redundant places. [2021-12-22 13:43:01,831 INFO L242 Difference]: Finished difference. Result has 214 places, 132 transitions, 800 flow [2021-12-22 13:43:01,831 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=800, PETRI_PLACES=214, PETRI_TRANSITIONS=132} [2021-12-22 13:43:01,831 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 123 predicate places. [2021-12-22 13:43:01,831 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 132 transitions, 800 flow [2021-12-22 13:43:01,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:01,832 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:01,832 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:01,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 13:43:01,832 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:01,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:01,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1355553186, now seen corresponding path program 17 times [2021-12-22 13:43:01,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:01,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855233433] [2021-12-22 13:43:01,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:01,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:01,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:01,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855233433] [2021-12-22 13:43:01,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855233433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:01,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:01,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:01,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099949220] [2021-12-22 13:43:01,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:01,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:01,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:01,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:01,906 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:01,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 132 transitions, 800 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:01,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:01,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:01,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:02,163 INFO L129 PetriNetUnfolder]: 81/427 cut-off events. [2021-12-22 13:43:02,163 INFO L130 PetriNetUnfolder]: For 1609/1620 co-relation queries the response was YES. [2021-12-22 13:43:02,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 427 events. 81/427 cut-off events. For 1609/1620 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2138 event pairs, 41 based on Foata normal form. 1/423 useless extension candidates. Maximal degree in co-relation 1672. Up to 185 conditions per place. [2021-12-22 13:43:02,169 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 64 selfloop transitions, 20 changer transitions 27/172 dead transitions. [2021-12-22 13:43:02,169 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 172 transitions, 1382 flow [2021-12-22 13:43:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:43:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:43:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1217 transitions. [2021-12-22 13:43:02,171 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6628540305010894 [2021-12-22 13:43:02,171 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1217 transitions. [2021-12-22 13:43:02,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1217 transitions. [2021-12-22 13:43:02,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:02,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1217 transitions. [2021-12-22 13:43:02,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.61111111111111) internal successors, (1217), 18 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,176 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,176 INFO L186 Difference]: Start difference. First operand has 214 places, 132 transitions, 800 flow. Second operand 18 states and 1217 transitions. [2021-12-22 13:43:02,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 172 transitions, 1382 flow [2021-12-22 13:43:02,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 172 transitions, 1236 flow, removed 25 selfloop flow, removed 18 redundant places. [2021-12-22 13:43:02,183 INFO L242 Difference]: Finished difference. Result has 199 places, 141 transitions, 913 flow [2021-12-22 13:43:02,184 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=913, PETRI_PLACES=199, PETRI_TRANSITIONS=141} [2021-12-22 13:43:02,187 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 108 predicate places. [2021-12-22 13:43:02,188 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 141 transitions, 913 flow [2021-12-22 13:43:02,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:02,188 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:02,188 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:02,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 13:43:02,189 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:02,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:02,189 INFO L85 PathProgramCache]: Analyzing trace with hash -16762456, now seen corresponding path program 18 times [2021-12-22 13:43:02,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:02,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149330417] [2021-12-22 13:43:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:02,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:02,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149330417] [2021-12-22 13:43:02,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149330417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:02,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:02,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:02,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971055048] [2021-12-22 13:43:02,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:02,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:02,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:02,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:02,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:02,274 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:02,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 141 transitions, 913 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:02,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:02,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:02,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:02,508 INFO L129 PetriNetUnfolder]: 77/417 cut-off events. [2021-12-22 13:43:02,508 INFO L130 PetriNetUnfolder]: For 1386/1397 co-relation queries the response was YES. [2021-12-22 13:43:02,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 417 events. 77/417 cut-off events. For 1386/1397 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2081 event pairs, 37 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 1617. Up to 185 conditions per place. [2021-12-22 13:43:02,511 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 65 selfloop transitions, 22 changer transitions 28/176 dead transitions. [2021-12-22 13:43:02,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 176 transitions, 1429 flow [2021-12-22 13:43:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:43:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:43:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1153 transitions. [2021-12-22 13:43:02,512 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6649365628604383 [2021-12-22 13:43:02,512 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1153 transitions. [2021-12-22 13:43:02,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1153 transitions. [2021-12-22 13:43:02,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:02,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1153 transitions. [2021-12-22 13:43:02,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.82352941176471) internal successors, (1153), 17 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,515 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,515 INFO L186 Difference]: Start difference. First operand has 199 places, 141 transitions, 913 flow. Second operand 17 states and 1153 transitions. [2021-12-22 13:43:02,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 176 transitions, 1429 flow [2021-12-22 13:43:02,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 176 transitions, 1348 flow, removed 36 selfloop flow, removed 5 redundant places. [2021-12-22 13:43:02,522 INFO L242 Difference]: Finished difference. Result has 211 places, 145 transitions, 995 flow [2021-12-22 13:43:02,522 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=995, PETRI_PLACES=211, PETRI_TRANSITIONS=145} [2021-12-22 13:43:02,522 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 120 predicate places. [2021-12-22 13:43:02,523 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 145 transitions, 995 flow [2021-12-22 13:43:02,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:02,523 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:02,523 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:02,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 13:43:02,523 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:02,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:02,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1346892406, now seen corresponding path program 19 times [2021-12-22 13:43:02,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:02,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061584732] [2021-12-22 13:43:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:02,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:02,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:02,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061584732] [2021-12-22 13:43:02,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061584732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:02,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:02,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:02,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954818152] [2021-12-22 13:43:02,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:02,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:02,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:02,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:02,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:02,599 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:02,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 145 transitions, 995 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:02,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:02,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:02,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:02,793 INFO L129 PetriNetUnfolder]: 71/408 cut-off events. [2021-12-22 13:43:02,793 INFO L130 PetriNetUnfolder]: For 1357/1368 co-relation queries the response was YES. [2021-12-22 13:43:02,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1641 conditions, 408 events. 71/408 cut-off events. For 1357/1368 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2030 event pairs, 37 based on Foata normal form. 1/405 useless extension candidates. Maximal degree in co-relation 1575. Up to 185 conditions per place. [2021-12-22 13:43:02,796 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 63 selfloop transitions, 13 changer transitions 32/169 dead transitions. [2021-12-22 13:43:02,796 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 169 transitions, 1389 flow [2021-12-22 13:43:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:43:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:43:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1212 transitions. [2021-12-22 13:43:02,799 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6601307189542484 [2021-12-22 13:43:02,799 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1212 transitions. [2021-12-22 13:43:02,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1212 transitions. [2021-12-22 13:43:02,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:02,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1212 transitions. [2021-12-22 13:43:02,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.33333333333333) internal successors, (1212), 18 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,802 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,802 INFO L186 Difference]: Start difference. First operand has 211 places, 145 transitions, 995 flow. Second operand 18 states and 1212 transitions. [2021-12-22 13:43:02,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 169 transitions, 1389 flow [2021-12-22 13:43:02,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 169 transitions, 1282 flow, removed 33 selfloop flow, removed 8 redundant places. [2021-12-22 13:43:02,809 INFO L242 Difference]: Finished difference. Result has 220 places, 136 transitions, 861 flow [2021-12-22 13:43:02,809 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=861, PETRI_PLACES=220, PETRI_TRANSITIONS=136} [2021-12-22 13:43:02,810 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 129 predicate places. [2021-12-22 13:43:02,810 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 136 transitions, 861 flow [2021-12-22 13:43:02,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:02,810 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:02,810 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:02,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-22 13:43:02,810 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:02,810 INFO L85 PathProgramCache]: Analyzing trace with hash 2017685588, now seen corresponding path program 20 times [2021-12-22 13:43:02,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:02,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034243341] [2021-12-22 13:43:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:02,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:02,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:02,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034243341] [2021-12-22 13:43:02,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034243341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:02,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:02,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:02,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607355306] [2021-12-22 13:43:02,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:02,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:02,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:02,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:02,898 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:02,898 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 136 transitions, 861 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:02,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:02,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:02,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:03,125 INFO L129 PetriNetUnfolder]: 63/337 cut-off events. [2021-12-22 13:43:03,125 INFO L130 PetriNetUnfolder]: For 1148/1159 co-relation queries the response was YES. [2021-12-22 13:43:03,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 337 events. 63/337 cut-off events. For 1148/1159 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1547 event pairs, 38 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 1310. Up to 163 conditions per place. [2021-12-22 13:43:03,127 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 49 selfloop transitions, 0 changer transitions 46/150 dead transitions. [2021-12-22 13:43:03,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 150 transitions, 1113 flow [2021-12-22 13:43:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:43:03,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:43:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1139 transitions. [2021-12-22 13:43:03,128 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2021-12-22 13:43:03,129 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1139 transitions. [2021-12-22 13:43:03,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1139 transitions. [2021-12-22 13:43:03,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:03,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1139 transitions. [2021-12-22 13:43:03,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.0) internal successors, (1139), 17 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:03,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:03,131 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:03,131 INFO L186 Difference]: Start difference. First operand has 220 places, 136 transitions, 861 flow. Second operand 17 states and 1139 transitions. [2021-12-22 13:43:03,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 150 transitions, 1113 flow [2021-12-22 13:43:03,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 150 transitions, 1009 flow, removed 27 selfloop flow, removed 21 redundant places. [2021-12-22 13:43:03,138 INFO L242 Difference]: Finished difference. Result has 201 places, 104 transitions, 529 flow [2021-12-22 13:43:03,139 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=529, PETRI_PLACES=201, PETRI_TRANSITIONS=104} [2021-12-22 13:43:03,139 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 110 predicate places. [2021-12-22 13:43:03,139 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 104 transitions, 529 flow [2021-12-22 13:43:03,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:03,139 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:03,139 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:03,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-22 13:43:03,140 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:03,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:03,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1259046234, now seen corresponding path program 5 times [2021-12-22 13:43:03,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:03,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10213275] [2021-12-22 13:43:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:03,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:03,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:03,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10213275] [2021-12-22 13:43:03,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10213275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:03,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:03,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:03,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480215407] [2021-12-22 13:43:03,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:03,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:03,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:03,220 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:03,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 104 transitions, 529 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:03,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:03,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:03,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:03,445 INFO L129 PetriNetUnfolder]: 77/354 cut-off events. [2021-12-22 13:43:03,446 INFO L130 PetriNetUnfolder]: For 1203/1205 co-relation queries the response was YES. [2021-12-22 13:43:03,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1379 conditions, 354 events. 77/354 cut-off events. For 1203/1205 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1637 event pairs, 30 based on Foata normal form. 1/352 useless extension candidates. Maximal degree in co-relation 1323. Up to 75 conditions per place. [2021-12-22 13:43:03,448 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 49 selfloop transitions, 25 changer transitions 29/158 dead transitions. [2021-12-22 13:43:03,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 158 transitions, 1158 flow [2021-12-22 13:43:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 13:43:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-22 13:43:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1411 transitions. [2021-12-22 13:43:03,451 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2021-12-22 13:43:03,451 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1411 transitions. [2021-12-22 13:43:03,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1411 transitions. [2021-12-22 13:43:03,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:03,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1411 transitions. [2021-12-22 13:43:03,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.19047619047619) internal successors, (1411), 21 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:03,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:03,456 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:03,456 INFO L186 Difference]: Start difference. First operand has 201 places, 104 transitions, 529 flow. Second operand 21 states and 1411 transitions. [2021-12-22 13:43:03,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 158 transitions, 1158 flow [2021-12-22 13:43:03,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 158 transitions, 1131 flow, removed 8 selfloop flow, removed 9 redundant places. [2021-12-22 13:43:03,461 INFO L242 Difference]: Finished difference. Result has 182 places, 114 transitions, 714 flow [2021-12-22 13:43:03,461 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=714, PETRI_PLACES=182, PETRI_TRANSITIONS=114} [2021-12-22 13:43:03,462 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 91 predicate places. [2021-12-22 13:43:03,462 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 114 transitions, 714 flow [2021-12-22 13:43:03,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:03,462 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:03,462 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:03,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-22 13:43:03,462 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:03,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:03,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2029187440, now seen corresponding path program 6 times [2021-12-22 13:43:03,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:03,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075166437] [2021-12-22 13:43:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:03,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:03,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:03,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075166437] [2021-12-22 13:43:03,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075166437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:03,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:03,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:03,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098277122] [2021-12-22 13:43:03,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:03,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:03,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:03,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:03,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:03,549 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:03,550 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 114 transitions, 714 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:03,550 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:03,550 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:03,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:03,726 INFO L129 PetriNetUnfolder]: 70/329 cut-off events. [2021-12-22 13:43:03,726 INFO L130 PetriNetUnfolder]: For 2165/2170 co-relation queries the response was YES. [2021-12-22 13:43:03,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 329 events. 70/329 cut-off events. For 2165/2170 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1496 event pairs, 16 based on Foata normal form. 1/327 useless extension candidates. Maximal degree in co-relation 1530. Up to 76 conditions per place. [2021-12-22 13:43:03,728 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 55 selfloop transitions, 30 changer transitions 20/160 dead transitions. [2021-12-22 13:43:03,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 160 transitions, 1445 flow [2021-12-22 13:43:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:43:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-22 13:43:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1078 transitions. [2021-12-22 13:43:03,730 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6605392156862745 [2021-12-22 13:43:03,730 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1078 transitions. [2021-12-22 13:43:03,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1078 transitions. [2021-12-22 13:43:03,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:03,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1078 transitions. [2021-12-22 13:43:03,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.375) internal successors, (1078), 16 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:03,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:03,732 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:03,732 INFO L186 Difference]: Start difference. First operand has 182 places, 114 transitions, 714 flow. Second operand 16 states and 1078 transitions. [2021-12-22 13:43:03,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 160 transitions, 1445 flow [2021-12-22 13:43:03,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 160 transitions, 1299 flow, removed 55 selfloop flow, removed 12 redundant places. [2021-12-22 13:43:03,739 INFO L242 Difference]: Finished difference. Result has 183 places, 124 transitions, 869 flow [2021-12-22 13:43:03,740 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=869, PETRI_PLACES=183, PETRI_TRANSITIONS=124} [2021-12-22 13:43:03,740 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 92 predicate places. [2021-12-22 13:43:03,740 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 124 transitions, 869 flow [2021-12-22 13:43:03,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:03,740 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:03,740 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:03,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-22 13:43:03,740 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:03,741 INFO L85 PathProgramCache]: Analyzing trace with hash 701916352, now seen corresponding path program 7 times [2021-12-22 13:43:03,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:03,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492589594] [2021-12-22 13:43:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:03,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:03,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:03,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492589594] [2021-12-22 13:43:03,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492589594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:03,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:03,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:03,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8357747] [2021-12-22 13:43:03,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:03,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:03,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:03,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:03,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:03,810 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:03,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 124 transitions, 869 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:03,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:03,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:03,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:04,042 INFO L129 PetriNetUnfolder]: 74/350 cut-off events. [2021-12-22 13:43:04,043 INFO L130 PetriNetUnfolder]: For 2199/2213 co-relation queries the response was YES. [2021-12-22 13:43:04,045 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1698 conditions, 350 events. 74/350 cut-off events. For 2199/2213 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1704 event pairs, 18 based on Foata normal form. 7/353 useless extension candidates. Maximal degree in co-relation 1633. Up to 74 conditions per place. [2021-12-22 13:43:04,046 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 60 selfloop transitions, 28 changer transitions 34/177 dead transitions. [2021-12-22 13:43:04,046 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 177 transitions, 1679 flow [2021-12-22 13:43:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:43:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-22 13:43:04,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1472 transitions. [2021-12-22 13:43:04,050 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6559714795008913 [2021-12-22 13:43:04,050 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1472 transitions. [2021-12-22 13:43:04,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1472 transitions. [2021-12-22 13:43:04,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:04,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1472 transitions. [2021-12-22 13:43:04,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.9090909090909) internal successors, (1472), 22 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:04,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:04,053 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:04,053 INFO L186 Difference]: Start difference. First operand has 183 places, 124 transitions, 869 flow. Second operand 22 states and 1472 transitions. [2021-12-22 13:43:04,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 177 transitions, 1679 flow [2021-12-22 13:43:04,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 177 transitions, 1502 flow, removed 62 selfloop flow, removed 7 redundant places. [2021-12-22 13:43:04,061 INFO L242 Difference]: Finished difference. Result has 204 places, 124 transitions, 886 flow [2021-12-22 13:43:04,061 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=886, PETRI_PLACES=204, PETRI_TRANSITIONS=124} [2021-12-22 13:43:04,061 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 113 predicate places. [2021-12-22 13:43:04,061 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 124 transitions, 886 flow [2021-12-22 13:43:04,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:04,062 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:04,062 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:04,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-22 13:43:04,062 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:04,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1764122982, now seen corresponding path program 8 times [2021-12-22 13:43:04,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:04,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902087902] [2021-12-22 13:43:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:04,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:04,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:04,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902087902] [2021-12-22 13:43:04,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902087902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:04,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:04,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:04,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38160528] [2021-12-22 13:43:04,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:04,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:04,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:04,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:04,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:04,150 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:04,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 124 transitions, 886 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:04,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:04,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:04,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:04,349 INFO L129 PetriNetUnfolder]: 61/321 cut-off events. [2021-12-22 13:43:04,349 INFO L130 PetriNetUnfolder]: For 2439/2449 co-relation queries the response was YES. [2021-12-22 13:43:04,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1560 conditions, 321 events. 61/321 cut-off events. For 2439/2449 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1438 event pairs, 16 based on Foata normal form. 4/322 useless extension candidates. Maximal degree in co-relation 1486. Up to 72 conditions per place. [2021-12-22 13:43:04,352 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 51 selfloop transitions, 16 changer transitions 31/153 dead transitions. [2021-12-22 13:43:04,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 153 transitions, 1358 flow [2021-12-22 13:43:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:43:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:43:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1203 transitions. [2021-12-22 13:43:04,353 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6552287581699346 [2021-12-22 13:43:04,353 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1203 transitions. [2021-12-22 13:43:04,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1203 transitions. [2021-12-22 13:43:04,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:04,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1203 transitions. [2021-12-22 13:43:04,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.83333333333333) internal successors, (1203), 18 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:04,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:04,356 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:04,356 INFO L186 Difference]: Start difference. First operand has 204 places, 124 transitions, 886 flow. Second operand 18 states and 1203 transitions. [2021-12-22 13:43:04,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 153 transitions, 1358 flow [2021-12-22 13:43:04,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 153 transitions, 1229 flow, removed 46 selfloop flow, removed 15 redundant places. [2021-12-22 13:43:04,364 INFO L242 Difference]: Finished difference. Result has 199 places, 109 transitions, 670 flow [2021-12-22 13:43:04,364 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=670, PETRI_PLACES=199, PETRI_TRANSITIONS=109} [2021-12-22 13:43:04,365 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 108 predicate places. [2021-12-22 13:43:04,365 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 109 transitions, 670 flow [2021-12-22 13:43:04,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:04,366 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:04,366 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:04,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-22 13:43:04,366 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:04,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash -133077446, now seen corresponding path program 9 times [2021-12-22 13:43:04,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:04,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760306473] [2021-12-22 13:43:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:04,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:04,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:04,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760306473] [2021-12-22 13:43:04,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760306473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:04,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:04,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:04,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414708278] [2021-12-22 13:43:04,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:04,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:04,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:04,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:04,474 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:04,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 109 transitions, 670 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:04,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:04,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:04,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:04,655 INFO L129 PetriNetUnfolder]: 63/319 cut-off events. [2021-12-22 13:43:04,656 INFO L130 PetriNetUnfolder]: For 2193/2199 co-relation queries the response was YES. [2021-12-22 13:43:04,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 319 events. 63/319 cut-off events. For 2193/2199 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1409 event pairs, 29 based on Foata normal form. 1/316 useless extension candidates. Maximal degree in co-relation 1469. Up to 72 conditions per place. [2021-12-22 13:43:04,657 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 42 selfloop transitions, 26 changer transitions 21/144 dead transitions. [2021-12-22 13:43:04,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 144 transitions, 1252 flow [2021-12-22 13:43:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:43:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:43:04,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1209 transitions. [2021-12-22 13:43:04,659 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6584967320261438 [2021-12-22 13:43:04,659 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1209 transitions. [2021-12-22 13:43:04,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1209 transitions. [2021-12-22 13:43:04,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:04,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1209 transitions. [2021-12-22 13:43:04,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.16666666666667) internal successors, (1209), 18 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:04,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:04,661 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:04,661 INFO L186 Difference]: Start difference. First operand has 199 places, 109 transitions, 670 flow. Second operand 18 states and 1209 transitions. [2021-12-22 13:43:04,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 144 transitions, 1252 flow [2021-12-22 13:43:04,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 144 transitions, 1087 flow, removed 34 selfloop flow, removed 19 redundant places. [2021-12-22 13:43:04,672 INFO L242 Difference]: Finished difference. Result has 183 places, 118 transitions, 778 flow [2021-12-22 13:43:04,672 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=778, PETRI_PLACES=183, PETRI_TRANSITIONS=118} [2021-12-22 13:43:04,673 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 92 predicate places. [2021-12-22 13:43:04,673 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 118 transitions, 778 flow [2021-12-22 13:43:04,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:04,673 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:04,673 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:04,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-22 13:43:04,674 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:04,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:04,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1946541864, now seen corresponding path program 10 times [2021-12-22 13:43:04,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:04,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417675181] [2021-12-22 13:43:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:04,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:04,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:04,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417675181] [2021-12-22 13:43:04,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417675181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:04,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:04,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:04,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173219421] [2021-12-22 13:43:04,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:04,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:04,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:04,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:04,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:04,762 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:04,762 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 118 transitions, 778 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:04,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:04,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:04,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:04,943 INFO L129 PetriNetUnfolder]: 60/314 cut-off events. [2021-12-22 13:43:04,943 INFO L130 PetriNetUnfolder]: For 1552/1562 co-relation queries the response was YES. [2021-12-22 13:43:04,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 314 events. 60/314 cut-off events. For 1552/1562 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1413 event pairs, 27 based on Foata normal form. 3/312 useless extension candidates. Maximal degree in co-relation 1357. Up to 72 conditions per place. [2021-12-22 13:43:04,945 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 43 selfloop transitions, 28 changer transitions 22/148 dead transitions. [2021-12-22 13:43:04,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 148 transitions, 1288 flow [2021-12-22 13:43:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:43:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:43:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1145 transitions. [2021-12-22 13:43:04,946 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.660322952710496 [2021-12-22 13:43:04,946 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1145 transitions. [2021-12-22 13:43:04,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1145 transitions. [2021-12-22 13:43:04,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:04,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1145 transitions. [2021-12-22 13:43:04,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.3529411764706) internal successors, (1145), 17 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:04,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:04,949 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:04,949 INFO L186 Difference]: Start difference. First operand has 183 places, 118 transitions, 778 flow. Second operand 17 states and 1145 transitions. [2021-12-22 13:43:04,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 148 transitions, 1288 flow [2021-12-22 13:43:04,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 148 transitions, 1215 flow, removed 29 selfloop flow, removed 5 redundant places. [2021-12-22 13:43:04,955 INFO L242 Difference]: Finished difference. Result has 195 places, 122 transitions, 874 flow [2021-12-22 13:43:04,955 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=874, PETRI_PLACES=195, PETRI_TRANSITIONS=122} [2021-12-22 13:43:04,956 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 104 predicate places. [2021-12-22 13:43:04,956 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 122 transitions, 874 flow [2021-12-22 13:43:04,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:04,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:04,956 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:04,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-22 13:43:04,956 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1910426902, now seen corresponding path program 11 times [2021-12-22 13:43:04,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:04,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122929513] [2021-12-22 13:43:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:04,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:05,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:05,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122929513] [2021-12-22 13:43:05,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122929513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:05,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:05,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:05,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894948955] [2021-12-22 13:43:05,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:05,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:05,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:05,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:05,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:05,030 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:05,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 122 transitions, 874 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:05,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:05,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:05,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:05,224 INFO L129 PetriNetUnfolder]: 57/314 cut-off events. [2021-12-22 13:43:05,224 INFO L130 PetriNetUnfolder]: For 1704/1710 co-relation queries the response was YES. [2021-12-22 13:43:05,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 314 events. 57/314 cut-off events. For 1704/1710 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1402 event pairs, 29 based on Foata normal form. 1/310 useless extension candidates. Maximal degree in co-relation 1350. Up to 72 conditions per place. [2021-12-22 13:43:05,227 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 43 selfloop transitions, 18 changer transitions 30/146 dead transitions. [2021-12-22 13:43:05,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 146 transitions, 1284 flow [2021-12-22 13:43:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:43:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:43:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1144 transitions. [2021-12-22 13:43:05,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6597462514417531 [2021-12-22 13:43:05,229 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1144 transitions. [2021-12-22 13:43:05,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1144 transitions. [2021-12-22 13:43:05,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:05,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1144 transitions. [2021-12-22 13:43:05,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.29411764705883) internal successors, (1144), 17 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:05,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:05,232 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:05,232 INFO L186 Difference]: Start difference. First operand has 195 places, 122 transitions, 874 flow. Second operand 17 states and 1144 transitions. [2021-12-22 13:43:05,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 146 transitions, 1284 flow [2021-12-22 13:43:05,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 146 transitions, 1193 flow, removed 22 selfloop flow, removed 8 redundant places. [2021-12-22 13:43:05,249 INFO L242 Difference]: Finished difference. Result has 202 places, 113 transitions, 733 flow [2021-12-22 13:43:05,249 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=733, PETRI_PLACES=202, PETRI_TRANSITIONS=113} [2021-12-22 13:43:05,249 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 111 predicate places. [2021-12-22 13:43:05,249 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 113 transitions, 733 flow [2021-12-22 13:43:05,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:05,250 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:05,250 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:05,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-22 13:43:05,250 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:05,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:05,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1117603654, now seen corresponding path program 12 times [2021-12-22 13:43:05,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:05,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592451382] [2021-12-22 13:43:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:05,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:05,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:05,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592451382] [2021-12-22 13:43:05,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592451382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:05,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:05,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:05,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163593630] [2021-12-22 13:43:05,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:05,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:05,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:05,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:05,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:05,323 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:05,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 113 transitions, 733 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:05,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:05,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:05,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:05,505 INFO L129 PetriNetUnfolder]: 47/269 cut-off events. [2021-12-22 13:43:05,505 INFO L130 PetriNetUnfolder]: For 1539/1549 co-relation queries the response was YES. [2021-12-22 13:43:05,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 269 events. 47/269 cut-off events. For 1539/1549 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1051 event pairs, 23 based on Foata normal form. 3/269 useless extension candidates. Maximal degree in co-relation 1109. Up to 66 conditions per place. [2021-12-22 13:43:05,508 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 33 selfloop transitions, 7 changer transitions 33/128 dead transitions. [2021-12-22 13:43:05,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 128 transitions, 997 flow [2021-12-22 13:43:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:43:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:43:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1199 transitions. [2021-12-22 13:43:05,509 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6530501089324618 [2021-12-22 13:43:05,509 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1199 transitions. [2021-12-22 13:43:05,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1199 transitions. [2021-12-22 13:43:05,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:05,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1199 transitions. [2021-12-22 13:43:05,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.61111111111111) internal successors, (1199), 18 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:05,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:05,512 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:05,512 INFO L186 Difference]: Start difference. First operand has 202 places, 113 transitions, 733 flow. Second operand 18 states and 1199 transitions. [2021-12-22 13:43:05,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 128 transitions, 997 flow [2021-12-22 13:43:05,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 128 transitions, 873 flow, removed 25 selfloop flow, removed 21 redundant places. [2021-12-22 13:43:05,517 INFO L242 Difference]: Finished difference. Result has 187 places, 93 transitions, 442 flow [2021-12-22 13:43:05,518 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=442, PETRI_PLACES=187, PETRI_TRANSITIONS=93} [2021-12-22 13:43:05,518 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 96 predicate places. [2021-12-22 13:43:05,518 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 93 transitions, 442 flow [2021-12-22 13:43:05,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:05,518 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:05,518 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:05,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-22 13:43:05,518 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash -642037244, now seen corresponding path program 13 times [2021-12-22 13:43:05,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:05,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817446769] [2021-12-22 13:43:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:05,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:05,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:05,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817446769] [2021-12-22 13:43:05,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817446769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:05,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:05,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:05,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74900015] [2021-12-22 13:43:05,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:05,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:05,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:05,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:05,585 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:05,586 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 93 transitions, 442 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:05,586 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:05,586 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:05,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:05,744 INFO L129 PetriNetUnfolder]: 40/235 cut-off events. [2021-12-22 13:43:05,744 INFO L130 PetriNetUnfolder]: For 1119/1120 co-relation queries the response was YES. [2021-12-22 13:43:05,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 235 events. 40/235 cut-off events. For 1119/1120 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 840 event pairs, 3 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 919. Up to 39 conditions per place. [2021-12-22 13:43:05,746 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 41 selfloop transitions, 18 changer transitions 21/135 dead transitions. [2021-12-22 13:43:05,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 135 transitions, 1035 flow [2021-12-22 13:43:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:43:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-22 13:43:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1080 transitions. [2021-12-22 13:43:05,747 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2021-12-22 13:43:05,747 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1080 transitions. [2021-12-22 13:43:05,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1080 transitions. [2021-12-22 13:43:05,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:05,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1080 transitions. [2021-12-22 13:43:05,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.5) internal successors, (1080), 16 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:05,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:05,749 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:05,749 INFO L186 Difference]: Start difference. First operand has 187 places, 93 transitions, 442 flow. Second operand 16 states and 1080 transitions. [2021-12-22 13:43:05,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 135 transitions, 1035 flow [2021-12-22 13:43:05,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 135 transitions, 769 flow, removed 70 selfloop flow, removed 24 redundant places. [2021-12-22 13:43:05,753 INFO L242 Difference]: Finished difference. Result has 160 places, 103 transitions, 510 flow [2021-12-22 13:43:05,754 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=510, PETRI_PLACES=160, PETRI_TRANSITIONS=103} [2021-12-22 13:43:05,754 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 69 predicate places. [2021-12-22 13:43:05,754 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 103 transitions, 510 flow [2021-12-22 13:43:05,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:05,754 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:05,754 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:05,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-22 13:43:05,755 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:05,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2096134828, now seen corresponding path program 14 times [2021-12-22 13:43:05,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:05,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571297378] [2021-12-22 13:43:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:05,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:05,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:05,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571297378] [2021-12-22 13:43:05,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571297378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:05,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:05,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:05,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532024295] [2021-12-22 13:43:05,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:05,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:05,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:05,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:05,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:05,826 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:05,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 103 transitions, 510 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:05,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:05,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:05,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:06,039 INFO L129 PetriNetUnfolder]: 39/248 cut-off events. [2021-12-22 13:43:06,039 INFO L130 PetriNetUnfolder]: For 673/674 co-relation queries the response was YES. [2021-12-22 13:43:06,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 248 events. 39/248 cut-off events. For 673/674 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 927 event pairs, 0 based on Foata normal form. 1/249 useless extension candidates. Maximal degree in co-relation 890. Up to 39 conditions per place. [2021-12-22 13:43:06,041 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 44 selfloop transitions, 23 changer transitions 31/153 dead transitions. [2021-12-22 13:43:06,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 153 transitions, 1173 flow [2021-12-22 13:43:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:43:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:43:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1339 transitions. [2021-12-22 13:43:06,042 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6563725490196078 [2021-12-22 13:43:06,042 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1339 transitions. [2021-12-22 13:43:06,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1339 transitions. [2021-12-22 13:43:06,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:06,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1339 transitions. [2021-12-22 13:43:06,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 66.95) internal successors, (1339), 20 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:06,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:06,046 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:06,046 INFO L186 Difference]: Start difference. First operand has 160 places, 103 transitions, 510 flow. Second operand 20 states and 1339 transitions. [2021-12-22 13:43:06,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 153 transitions, 1173 flow [2021-12-22 13:43:06,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 153 transitions, 1053 flow, removed 36 selfloop flow, removed 7 redundant places. [2021-12-22 13:43:06,050 INFO L242 Difference]: Finished difference. Result has 180 places, 112 transitions, 646 flow [2021-12-22 13:43:06,050 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=646, PETRI_PLACES=180, PETRI_TRANSITIONS=112} [2021-12-22 13:43:06,050 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 89 predicate places. [2021-12-22 13:43:06,050 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 112 transitions, 646 flow [2021-12-22 13:43:06,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:06,051 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:06,051 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:06,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-22 13:43:06,051 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2128565562, now seen corresponding path program 15 times [2021-12-22 13:43:06,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:06,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628194093] [2021-12-22 13:43:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:06,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:06,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:06,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628194093] [2021-12-22 13:43:06,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628194093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:06,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:06,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:06,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413676926] [2021-12-22 13:43:06,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:06,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:06,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:06,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:06,120 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:06,120 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 112 transitions, 646 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:06,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:06,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:06,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:06,325 INFO L129 PetriNetUnfolder]: 34/241 cut-off events. [2021-12-22 13:43:06,326 INFO L130 PetriNetUnfolder]: For 798/799 co-relation queries the response was YES. [2021-12-22 13:43:06,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 241 events. 34/241 cut-off events. For 798/799 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 881 event pairs, 3 based on Foata normal form. 1/241 useless extension candidates. Maximal degree in co-relation 912. Up to 31 conditions per place. [2021-12-22 13:43:06,327 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 42 selfloop transitions, 22 changer transitions 33/152 dead transitions. [2021-12-22 13:43:06,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 152 transitions, 1225 flow [2021-12-22 13:43:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:43:06,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-22 13:43:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1468 transitions. [2021-12-22 13:43:06,329 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6541889483065954 [2021-12-22 13:43:06,329 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1468 transitions. [2021-12-22 13:43:06,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1468 transitions. [2021-12-22 13:43:06,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:06,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1468 transitions. [2021-12-22 13:43:06,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.72727272727273) internal successors, (1468), 22 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:06,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:06,335 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:06,335 INFO L186 Difference]: Start difference. First operand has 180 places, 112 transitions, 646 flow. Second operand 22 states and 1468 transitions. [2021-12-22 13:43:06,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 152 transitions, 1225 flow [2021-12-22 13:43:06,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 152 transitions, 1064 flow, removed 64 selfloop flow, removed 12 redundant places. [2021-12-22 13:43:06,339 INFO L242 Difference]: Finished difference. Result has 189 places, 110 transitions, 618 flow [2021-12-22 13:43:06,340 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=618, PETRI_PLACES=189, PETRI_TRANSITIONS=110} [2021-12-22 13:43:06,341 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 98 predicate places. [2021-12-22 13:43:06,341 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 110 transitions, 618 flow [2021-12-22 13:43:06,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:06,341 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:06,341 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:06,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-22 13:43:06,342 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:06,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:06,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1778296578, now seen corresponding path program 16 times [2021-12-22 13:43:06,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:06,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737035536] [2021-12-22 13:43:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:06,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:06,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:06,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737035536] [2021-12-22 13:43:06,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737035536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:06,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:06,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:06,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834870940] [2021-12-22 13:43:06,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:06,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:06,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:06,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:06,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:06,419 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:06,419 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 110 transitions, 618 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:06,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:06,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:06,420 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:06,584 INFO L129 PetriNetUnfolder]: 24/194 cut-off events. [2021-12-22 13:43:06,584 INFO L130 PetriNetUnfolder]: For 603/604 co-relation queries the response was YES. [2021-12-22 13:43:06,585 INFO L84 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 194 events. 24/194 cut-off events. For 603/604 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 561 event pairs, 3 based on Foata normal form. 1/194 useless extension candidates. Maximal degree in co-relation 708. Up to 30 conditions per place. [2021-12-22 13:43:06,585 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 35 selfloop transitions, 10 changer transitions 30/130 dead transitions. [2021-12-22 13:43:06,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 130 transitions, 930 flow [2021-12-22 13:43:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:43:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:43:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1201 transitions. [2021-12-22 13:43:06,586 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6541394335511983 [2021-12-22 13:43:06,587 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1201 transitions. [2021-12-22 13:43:06,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1201 transitions. [2021-12-22 13:43:06,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:06,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1201 transitions. [2021-12-22 13:43:06,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.72222222222223) internal successors, (1201), 18 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:06,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:06,589 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:06,589 INFO L186 Difference]: Start difference. First operand has 189 places, 110 transitions, 618 flow. Second operand 18 states and 1201 transitions. [2021-12-22 13:43:06,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 130 transitions, 930 flow [2021-12-22 13:43:06,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 130 transitions, 811 flow, removed 35 selfloop flow, removed 20 redundant places. [2021-12-22 13:43:06,593 INFO L242 Difference]: Finished difference. Result has 179 places, 95 transitions, 426 flow [2021-12-22 13:43:06,593 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=426, PETRI_PLACES=179, PETRI_TRANSITIONS=95} [2021-12-22 13:43:06,593 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 88 predicate places. [2021-12-22 13:43:06,593 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 95 transitions, 426 flow [2021-12-22 13:43:06,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:06,594 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:06,594 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:06,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-22 13:43:06,594 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:06,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:06,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2002258780, now seen corresponding path program 17 times [2021-12-22 13:43:06,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:06,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823790777] [2021-12-22 13:43:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:06,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:06,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:06,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823790777] [2021-12-22 13:43:06,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823790777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:06,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:06,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:06,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526140535] [2021-12-22 13:43:06,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:06,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:06,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:06,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:06,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:06,670 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:06,671 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 95 transitions, 426 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:06,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:06,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:06,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:06,865 INFO L129 PetriNetUnfolder]: 29/201 cut-off events. [2021-12-22 13:43:06,865 INFO L130 PetriNetUnfolder]: For 652/653 co-relation queries the response was YES. [2021-12-22 13:43:06,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 201 events. 29/201 cut-off events. For 652/653 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 590 event pairs, 4 based on Foata normal form. 1/200 useless extension candidates. Maximal degree in co-relation 731. Up to 30 conditions per place. [2021-12-22 13:43:06,867 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 33 selfloop transitions, 20 changer transitions 23/131 dead transitions. [2021-12-22 13:43:06,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 131 transitions, 918 flow [2021-12-22 13:43:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:43:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:43:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1206 transitions. [2021-12-22 13:43:06,868 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2021-12-22 13:43:06,868 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1206 transitions. [2021-12-22 13:43:06,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1206 transitions. [2021-12-22 13:43:06,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:06,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1206 transitions. [2021-12-22 13:43:06,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.0) internal successors, (1206), 18 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:06,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:06,871 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:06,871 INFO L186 Difference]: Start difference. First operand has 179 places, 95 transitions, 426 flow. Second operand 18 states and 1206 transitions. [2021-12-22 13:43:06,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 131 transitions, 918 flow [2021-12-22 13:43:06,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 131 transitions, 766 flow, removed 28 selfloop flow, removed 17 redundant places. [2021-12-22 13:43:06,875 INFO L242 Difference]: Finished difference. Result has 165 places, 104 transitions, 535 flow [2021-12-22 13:43:06,876 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=535, PETRI_PLACES=165, PETRI_TRANSITIONS=104} [2021-12-22 13:43:06,876 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 74 predicate places. [2021-12-22 13:43:06,876 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 104 transitions, 535 flow [2021-12-22 13:43:06,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:06,876 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:06,876 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:06,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-22 13:43:06,876 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:06,877 INFO L85 PathProgramCache]: Analyzing trace with hash -445289574, now seen corresponding path program 18 times [2021-12-22 13:43:06,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:06,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974626463] [2021-12-22 13:43:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:06,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:06,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:06,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974626463] [2021-12-22 13:43:06,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974626463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:06,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:06,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:06,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159864407] [2021-12-22 13:43:06,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:06,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:06,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:06,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:06,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:06,979 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:06,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 104 transitions, 535 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:06,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:06,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:06,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:07,167 INFO L129 PetriNetUnfolder]: 25/203 cut-off events. [2021-12-22 13:43:07,167 INFO L130 PetriNetUnfolder]: For 442/443 co-relation queries the response was YES. [2021-12-22 13:43:07,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 203 events. 25/203 cut-off events. For 442/443 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 598 event pairs, 0 based on Foata normal form. 1/204 useless extension candidates. Maximal degree in co-relation 683. Up to 30 conditions per place. [2021-12-22 13:43:07,168 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 34 selfloop transitions, 22 changer transitions 24/135 dead transitions. [2021-12-22 13:43:07,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 135 transitions, 959 flow [2021-12-22 13:43:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:43:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:43:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1142 transitions. [2021-12-22 13:43:07,176 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6585928489042676 [2021-12-22 13:43:07,176 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1142 transitions. [2021-12-22 13:43:07,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1142 transitions. [2021-12-22 13:43:07,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:07,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1142 transitions. [2021-12-22 13:43:07,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.17647058823529) internal successors, (1142), 17 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:07,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:07,178 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:07,179 INFO L186 Difference]: Start difference. First operand has 165 places, 104 transitions, 535 flow. Second operand 17 states and 1142 transitions. [2021-12-22 13:43:07,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 135 transitions, 959 flow [2021-12-22 13:43:07,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 135 transitions, 876 flow, removed 37 selfloop flow, removed 6 redundant places. [2021-12-22 13:43:07,182 INFO L242 Difference]: Finished difference. Result has 176 places, 108 transitions, 615 flow [2021-12-22 13:43:07,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=615, PETRI_PLACES=176, PETRI_TRANSITIONS=108} [2021-12-22 13:43:07,183 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 85 predicate places. [2021-12-22 13:43:07,183 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 108 transitions, 615 flow [2021-12-22 13:43:07,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:07,183 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:07,183 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:07,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-22 13:43:07,183 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:07,183 INFO L85 PathProgramCache]: Analyzing trace with hash -453206120, now seen corresponding path program 19 times [2021-12-22 13:43:07,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:07,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050617629] [2021-12-22 13:43:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:07,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:07,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:07,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050617629] [2021-12-22 13:43:07,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050617629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:07,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:07,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:07,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975241930] [2021-12-22 13:43:07,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:07,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:07,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:07,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:07,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:07,249 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:07,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 108 transitions, 615 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:07,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:07,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:07,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:07,405 INFO L129 PetriNetUnfolder]: 19/188 cut-off events. [2021-12-22 13:43:07,405 INFO L130 PetriNetUnfolder]: For 386/387 co-relation queries the response was YES. [2021-12-22 13:43:07,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 188 events. 19/188 cut-off events. For 386/387 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 520 event pairs, 0 based on Foata normal form. 1/189 useless extension candidates. Maximal degree in co-relation 637. Up to 30 conditions per place. [2021-12-22 13:43:07,406 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 32 selfloop transitions, 13 changer transitions 28/128 dead transitions. [2021-12-22 13:43:07,406 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 128 transitions, 923 flow [2021-12-22 13:43:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:43:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:43:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1201 transitions. [2021-12-22 13:43:07,407 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6541394335511983 [2021-12-22 13:43:07,407 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1201 transitions. [2021-12-22 13:43:07,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1201 transitions. [2021-12-22 13:43:07,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:07,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1201 transitions. [2021-12-22 13:43:07,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.72222222222223) internal successors, (1201), 18 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:07,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:07,410 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:07,410 INFO L186 Difference]: Start difference. First operand has 176 places, 108 transitions, 615 flow. Second operand 18 states and 1201 transitions. [2021-12-22 13:43:07,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 128 transitions, 923 flow [2021-12-22 13:43:07,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 128 transitions, 828 flow, removed 27 selfloop flow, removed 9 redundant places. [2021-12-22 13:43:07,413 INFO L242 Difference]: Finished difference. Result has 184 places, 99 transitions, 487 flow [2021-12-22 13:43:07,413 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=487, PETRI_PLACES=184, PETRI_TRANSITIONS=99} [2021-12-22 13:43:07,414 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 93 predicate places. [2021-12-22 13:43:07,414 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 99 transitions, 487 flow [2021-12-22 13:43:07,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:07,414 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:07,414 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:07,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-22 13:43:07,414 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:07,414 INFO L85 PathProgramCache]: Analyzing trace with hash 542281632, now seen corresponding path program 20 times [2021-12-22 13:43:07,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:07,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575382925] [2021-12-22 13:43:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:07,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:07,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:07,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575382925] [2021-12-22 13:43:07,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575382925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:07,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:07,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:43:07,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161071016] [2021-12-22 13:43:07,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:07,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:43:07,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:43:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:43:07,485 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-22 13:43:07,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 99 transitions, 487 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:07,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:07,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-22 13:43:07,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:07,629 INFO L129 PetriNetUnfolder]: 11/117 cut-off events. [2021-12-22 13:43:07,630 INFO L130 PetriNetUnfolder]: For 230/231 co-relation queries the response was YES. [2021-12-22 13:43:07,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 117 events. 11/117 cut-off events. For 230/231 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 205 event pairs, 0 based on Foata normal form. 1/118 useless extension candidates. Maximal degree in co-relation 381. Up to 12 conditions per place. [2021-12-22 13:43:07,630 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 0 selfloop transitions, 0 changer transitions 89/89 dead transitions. [2021-12-22 13:43:07,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 89 transitions, 585 flow [2021-12-22 13:43:07,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:43:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:43:07,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1111 transitions. [2021-12-22 13:43:07,632 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6407151095732411 [2021-12-22 13:43:07,632 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1111 transitions. [2021-12-22 13:43:07,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1111 transitions. [2021-12-22 13:43:07,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:07,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1111 transitions. [2021-12-22 13:43:07,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.3529411764706) internal successors, (1111), 17 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:07,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:07,634 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:07,634 INFO L186 Difference]: Start difference. First operand has 184 places, 99 transitions, 487 flow. Second operand 17 states and 1111 transitions. [2021-12-22 13:43:07,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 89 transitions, 585 flow [2021-12-22 13:43:07,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 89 transitions, 484 flow, removed 22 selfloop flow, removed 21 redundant places. [2021-12-22 13:43:07,636 INFO L242 Difference]: Finished difference. Result has 147 places, 0 transitions, 0 flow [2021-12-22 13:43:07,637 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=0, PETRI_PLACES=147, PETRI_TRANSITIONS=0} [2021-12-22 13:43:07,637 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 56 predicate places. [2021-12-22 13:43:07,637 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 0 transitions, 0 flow [2021-12-22 13:43:07,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 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) [2021-12-22 13:43:07,640 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-22 13:43:07,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-12-22 13:43:07,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-12-22 13:43:07,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-22 13:43:07,645 INFO L732 BasicCegarLoop]: Path program histogram: [20, 20, 2, 2, 2, 1] [2021-12-22 13:43:07,646 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-22 13:43:07,647 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 13:43:07,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 01:43:07 BasicIcfg [2021-12-22 13:43:07,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 13:43:07,649 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 13:43:07,649 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 13:43:07,649 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 13:43:07,650 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:42:52" (3/4) ... [2021-12-22 13:43:07,652 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 13:43:07,656 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-12-22 13:43:07,656 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-12-22 13:43:07,662 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-12-22 13:43:07,663 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-22 13:43:07,663 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-22 13:43:07,663 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 13:43:07,687 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 13:43:07,687 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 13:43:07,688 INFO L158 Benchmark]: Toolchain (without parser) took 15325.32ms. Allocated memory was 111.1MB in the beginning and 325.1MB in the end (delta: 213.9MB). Free memory was 83.0MB in the beginning and 110.9MB in the end (delta: -28.0MB). Peak memory consumption was 186.5MB. Max. memory is 16.1GB. [2021-12-22 13:43:07,688 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 111.1MB. Free memory is still 68.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:43:07,689 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.80ms. Allocated memory is still 111.1MB. Free memory was 82.7MB in the beginning and 85.8MB in the end (delta: -3.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 13:43:07,689 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.55ms. Allocated memory is still 111.1MB. Free memory was 85.8MB in the beginning and 84.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:43:07,689 INFO L158 Benchmark]: Boogie Preprocessor took 12.71ms. Allocated memory is still 111.1MB. Free memory was 84.1MB in the beginning and 83.1MB in the end (delta: 999.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:43:07,689 INFO L158 Benchmark]: RCFGBuilder took 256.16ms. Allocated memory is still 111.1MB. Free memory was 82.8MB in the beginning and 71.4MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 13:43:07,689 INFO L158 Benchmark]: TraceAbstraction took 14795.50ms. Allocated memory was 111.1MB in the beginning and 325.1MB in the end (delta: 213.9MB). Free memory was 71.0MB in the beginning and 114.1MB in the end (delta: -43.1MB). Peak memory consumption was 172.9MB. Max. memory is 16.1GB. [2021-12-22 13:43:07,690 INFO L158 Benchmark]: Witness Printer took 38.11ms. Allocated memory is still 325.1MB. Free memory was 114.1MB in the beginning and 110.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 13:43:07,692 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 111.1MB. Free memory is still 68.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 178.80ms. Allocated memory is still 111.1MB. Free memory was 82.7MB in the beginning and 85.8MB in the end (delta: -3.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.55ms. Allocated memory is still 111.1MB. Free memory was 85.8MB in the beginning and 84.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.71ms. Allocated memory is still 111.1MB. Free memory was 84.1MB in the beginning and 83.1MB in the end (delta: 999.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 256.16ms. Allocated memory is still 111.1MB. Free memory was 82.8MB in the beginning and 71.4MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 14795.50ms. Allocated memory was 111.1MB in the beginning and 325.1MB in the end (delta: 213.9MB). Free memory was 71.0MB in the beginning and 114.1MB in the end (delta: -43.1MB). Peak memory consumption was 172.9MB. Max. memory is 16.1GB. * Witness Printer took 38.11ms. Allocated memory is still 325.1MB. Free memory was 114.1MB in the beginning and 110.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 69]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 122 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.7s, OverallIterations: 47, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 10.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1863 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1863 mSDsluCounter, 9092 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8926 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7632 IncrementalHoareTripleChecker+Invalid, 7665 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 1763 mSDtfsCounter, 7632 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1016 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 871 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1237occurred in iteration=18, InterpolantAutomatonStates: 803, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 3611 NumberOfCodeBlocks, 3611 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 3564 ConstructedInterpolants, 0 QuantifiedInterpolants, 14424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 47 InterpolantComputations, 47 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-22 13:43:07,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE