./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/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 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:48:46,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:48:46,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:48:46,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:48:46,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:48:46,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:48:46,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:48:46,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:48:46,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:48:46,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:48:46,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:48:46,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:48:46,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:48:46,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:48:46,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:48:46,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:48:46,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:48:46,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:48:46,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:48:46,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:48:46,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:48:46,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:48:46,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:48:46,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:48:46,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:48:46,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:48:46,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:48:46,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:48:46,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:48:46,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:48:46,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:48:46,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:48:46,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:48:46,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:48:46,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:48:46,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:48:46,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:48:46,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:48:46,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:48:46,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:48:46,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:48:46,422 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:48:46,459 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:48:46,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:48:46,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:48:46,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:48:46,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:48:46,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:48:46,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:48:46,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:48:46,469 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:48:46,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:48:46,470 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:48:46,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:48:46,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:48:46,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:48:46,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:48:46,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:48:46,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:48:46,471 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:48:46,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:48:46,472 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:48:46,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:48:46,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:48:46,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:48:46,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:48:46,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:48:46,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:48:46,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:48:46,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:48:46,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:48:46,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:48:46,473 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:48:46,473 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:48:46,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:48:46,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:48:46,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c361ebc03d879240d418527d643e8a7b3c7ac084ceb3e66857b21a687a1c7f90 [2021-12-14 16:48:46,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:48:46,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:48:46,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:48:46,893 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:48:46,894 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:48:46,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-sre-symm.wvr.c [2021-12-14 16:48:46,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd774e523/94d35c838e0948388660f1d6be127817/FLAG5bdef4845 [2021-12-14 16:48:47,455 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:48:47,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-sre-symm.wvr.c [2021-12-14 16:48:47,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd774e523/94d35c838e0948388660f1d6be127817/FLAG5bdef4845 [2021-12-14 16:48:47,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd774e523/94d35c838e0948388660f1d6be127817 [2021-12-14 16:48:47,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:48:47,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:48:47,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:48:47,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:48:47,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:48:47,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:48:47" (1/1) ... [2021-12-14 16:48:47,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f2b078f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47, skipping insertion in model container [2021-12-14 16:48:47,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:48:47" (1/1) ... [2021-12-14 16:48:47,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:48:47,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:48:47,827 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] [2021-12-14 16:48:47,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:48:47,856 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:48:47,914 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] [2021-12-14 16:48:47,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:48:47,928 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:48:47,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47 WrapperNode [2021-12-14 16:48:47,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:48:47,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:48:47,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:48:47,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:48:47,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47" (1/1) ... [2021-12-14 16:48:47,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47" (1/1) ... [2021-12-14 16:48:47,997 INFO L137 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 60 [2021-12-14 16:48:48,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:48:48,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:48:48,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:48:48,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:48:48,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47" (1/1) ... [2021-12-14 16:48:48,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47" (1/1) ... [2021-12-14 16:48:48,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47" (1/1) ... [2021-12-14 16:48:48,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47" (1/1) ... [2021-12-14 16:48:48,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47" (1/1) ... [2021-12-14 16:48:48,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47" (1/1) ... [2021-12-14 16:48:48,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47" (1/1) ... [2021-12-14 16:48:48,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:48:48,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:48:48,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:48:48,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:48:48,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47" (1/1) ... [2021-12-14 16:48:48,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:48:48,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:48:48,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:48:48,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:48:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:48:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:48:48,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:48:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:48:48,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:48:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:48:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:48:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:48:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:48:48,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:48:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:48:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:48:48,208 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-14 16:48:48,315 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:48:48,317 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:48:48,568 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:48:48,576 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:48:48,591 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 16:48:48,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:48:48 BoogieIcfgContainer [2021-12-14 16:48:48,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:48:48,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:48:48,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:48:48,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:48:48,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:48:47" (1/3) ... [2021-12-14 16:48:48,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4401f28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:48:48, skipping insertion in model container [2021-12-14 16:48:48,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:47" (2/3) ... [2021-12-14 16:48:48,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4401f28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:48:48, skipping insertion in model container [2021-12-14 16:48:48,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:48:48" (3/3) ... [2021-12-14 16:48:48,602 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-sre-symm.wvr.c [2021-12-14 16:48:48,607 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:48:48,607 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:48:48,607 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:48:48,607 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:48:48,661 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,666 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,666 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,666 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,667 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,667 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,675 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,675 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,675 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,695 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,696 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,696 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,696 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,700 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,700 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,700 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,700 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:48:48,705 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-14 16:48:48,775 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:48:48,783 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:48:48,784 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-14 16:48:48,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 102 places, 102 transitions, 220 flow [2021-12-14 16:48:48,896 INFO L129 PetriNetUnfolder]: 7/100 cut-off events. [2021-12-14 16:48:48,896 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:48:48,901 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. [2021-12-14 16:48:48,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 102 transitions, 220 flow [2021-12-14 16:48:48,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 194 flow [2021-12-14 16:48:48,936 INFO L129 PetriNetUnfolder]: 7/90 cut-off events. [2021-12-14 16:48:48,936 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:48:48,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:48,937 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] [2021-12-14 16:48:48,938 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:48,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1122200234, now seen corresponding path program 1 times [2021-12-14 16:48:48,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:48,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129880448] [2021-12-14 16:48:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:48,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:49,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:49,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129880448] [2021-12-14 16:48:49,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129880448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:49,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:49,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:48:49,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221394968] [2021-12-14 16:48:49,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:49,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:48:49,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:49,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:48:49,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:48:49,483 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 102 [2021-12-14 16:48:49,490 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) [2021-12-14 16:48:49,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:49,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 102 [2021-12-14 16:48:49,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:49,871 INFO L129 PetriNetUnfolder]: 55/294 cut-off events. [2021-12-14 16:48:49,871 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2021-12-14 16:48:49,872 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. [2021-12-14 16:48:49,876 INFO L132 encePairwiseOnDemand]: 86/102 looper letters, 52 selfloop transitions, 10 changer transitions 34/155 dead transitions. [2021-12-14 16:48:49,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 155 transitions, 541 flow [2021-12-14 16:48:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:48:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-14 16:48:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1141 transitions. [2021-12-14 16:48:49,909 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7457516339869281 [2021-12-14 16:48:49,910 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1141 transitions. [2021-12-14 16:48:49,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1141 transitions. [2021-12-14 16:48:49,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:49,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1141 transitions. [2021-12-14 16:48:49,920 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) [2021-12-14 16:48:49,932 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) [2021-12-14 16:48:49,933 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) [2021-12-14 16:48:49,935 INFO L186 Difference]: Start difference. First operand has 91 places, 91 transitions, 194 flow. Second operand 15 states and 1141 transitions. [2021-12-14 16:48:49,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 155 transitions, 541 flow [2021-12-14 16:48:49,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 155 transitions, 515 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:48:49,956 INFO L242 Difference]: Finished difference. Result has 111 places, 93 transitions, 253 flow [2021-12-14 16:48:49,957 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} [2021-12-14 16:48:49,960 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 20 predicate places. [2021-12-14 16:48:49,960 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 93 transitions, 253 flow [2021-12-14 16:48:49,961 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) [2021-12-14 16:48:49,961 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:49,961 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] [2021-12-14 16:48:49,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:48:49,962 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:49,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:49,962 INFO L85 PathProgramCache]: Analyzing trace with hash 697994717, now seen corresponding path program 1 times [2021-12-14 16:48:49,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:49,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562379761] [2021-12-14 16:48:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:49,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:50,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:50,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562379761] [2021-12-14 16:48:50,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562379761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:50,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:50,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:48:50,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405323205] [2021-12-14 16:48:50,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:50,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:48:50,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:48:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:48:50,131 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-14 16:48:50,131 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) [2021-12-14 16:48:50,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:50,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-14 16:48:50,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:50,224 INFO L129 PetriNetUnfolder]: 41/290 cut-off events. [2021-12-14 16:48:50,224 INFO L130 PetriNetUnfolder]: For 107/112 co-relation queries the response was YES. [2021-12-14 16:48:50,226 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. [2021-12-14 16:48:50,227 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 18 selfloop transitions, 2 changer transitions 1/98 dead transitions. [2021-12-14 16:48:50,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 98 transitions, 308 flow [2021-12-14 16:48:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:48:50,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:48:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2021-12-14 16:48:50,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8790849673202614 [2021-12-14 16:48:50,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2021-12-14 16:48:50,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2021-12-14 16:48:50,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:50,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2021-12-14 16:48:50,230 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) [2021-12-14 16:48:50,231 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) [2021-12-14 16:48:50,235 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) [2021-12-14 16:48:50,235 INFO L186 Difference]: Start difference. First operand has 111 places, 93 transitions, 253 flow. Second operand 3 states and 269 transitions. [2021-12-14 16:48:50,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 98 transitions, 308 flow [2021-12-14 16:48:50,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 98 transitions, 297 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-12-14 16:48:50,253 INFO L242 Difference]: Finished difference. Result has 100 places, 95 transitions, 262 flow [2021-12-14 16:48:50,253 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} [2021-12-14 16:48:50,254 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 9 predicate places. [2021-12-14 16:48:50,254 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 262 flow [2021-12-14 16:48:50,255 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) [2021-12-14 16:48:50,255 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:50,255 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] [2021-12-14 16:48:50,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:48:50,255 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1049557055, now seen corresponding path program 2 times [2021-12-14 16:48:50,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:50,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399419520] [2021-12-14 16:48:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:50,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:50,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:50,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399419520] [2021-12-14 16:48:50,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399419520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:50,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:50,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:48:50,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250724805] [2021-12-14 16:48:50,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:50,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:48:50,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:48:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:48:50,387 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-14 16:48:50,388 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) [2021-12-14 16:48:50,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:50,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-14 16:48:50,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:50,473 INFO L129 PetriNetUnfolder]: 28/218 cut-off events. [2021-12-14 16:48:50,473 INFO L130 PetriNetUnfolder]: For 59/60 co-relation queries the response was YES. [2021-12-14 16:48:50,473 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. [2021-12-14 16:48:50,474 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 16 selfloop transitions, 0 changer transitions 13/96 dead transitions. [2021-12-14 16:48:50,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 307 flow [2021-12-14 16:48:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:48:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:48:50,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2021-12-14 16:48:50,475 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8790849673202614 [2021-12-14 16:48:50,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2021-12-14 16:48:50,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2021-12-14 16:48:50,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:50,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2021-12-14 16:48:50,492 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) [2021-12-14 16:48:50,493 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) [2021-12-14 16:48:50,493 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) [2021-12-14 16:48:50,493 INFO L186 Difference]: Start difference. First operand has 100 places, 95 transitions, 262 flow. Second operand 3 states and 269 transitions. [2021-12-14 16:48:50,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 307 flow [2021-12-14 16:48:50,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 96 transitions, 300 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-14 16:48:50,502 INFO L242 Difference]: Finished difference. Result has 101 places, 83 transitions, 202 flow [2021-12-14 16:48:50,503 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} [2021-12-14 16:48:50,504 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 10 predicate places. [2021-12-14 16:48:50,504 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 202 flow [2021-12-14 16:48:50,505 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) [2021-12-14 16:48:50,505 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:50,505 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:48:50,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:48:50,505 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:50,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:50,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1224331634, now seen corresponding path program 1 times [2021-12-14 16:48:50,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:50,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118410776] [2021-12-14 16:48:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:50,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:50,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:50,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118410776] [2021-12-14 16:48:50,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118410776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:50,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:50,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:50,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92858388] [2021-12-14 16:48:50,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:50,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:50,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:50,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:50,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:50,792 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:50,793 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) [2021-12-14 16:48:50,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:50,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:50,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:51,287 INFO L129 PetriNetUnfolder]: 96/360 cut-off events. [2021-12-14 16:48:51,288 INFO L130 PetriNetUnfolder]: For 149/150 co-relation queries the response was YES. [2021-12-14 16:48:51,289 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. [2021-12-14 16:48:51,290 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 75 selfloop transitions, 5 changer transitions 34/167 dead transitions. [2021-12-14 16:48:51,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 167 transitions, 697 flow [2021-12-14 16:48:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 16:48:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-14 16:48:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1627 transitions. [2021-12-14 16:48:51,295 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6646241830065359 [2021-12-14 16:48:51,295 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1627 transitions. [2021-12-14 16:48:51,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1627 transitions. [2021-12-14 16:48:51,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:51,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1627 transitions. [2021-12-14 16:48:51,299 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) [2021-12-14 16:48:51,338 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) [2021-12-14 16:48:51,339 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) [2021-12-14 16:48:51,339 INFO L186 Difference]: Start difference. First operand has 101 places, 83 transitions, 202 flow. Second operand 24 states and 1627 transitions. [2021-12-14 16:48:51,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 167 transitions, 697 flow [2021-12-14 16:48:51,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 167 transitions, 643 flow, removed 22 selfloop flow, removed 6 redundant places. [2021-12-14 16:48:51,343 INFO L242 Difference]: Finished difference. Result has 133 places, 87 transitions, 283 flow [2021-12-14 16:48:51,343 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} [2021-12-14 16:48:51,344 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 42 predicate places. [2021-12-14 16:48:51,344 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 87 transitions, 283 flow [2021-12-14 16:48:51,346 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) [2021-12-14 16:48:51,346 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:51,346 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] [2021-12-14 16:48:51,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:48:51,346 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash -608647506, now seen corresponding path program 2 times [2021-12-14 16:48:51,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:51,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654418736] [2021-12-14 16:48:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:51,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:51,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:51,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654418736] [2021-12-14 16:48:51,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654418736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:51,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:51,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:51,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917024975] [2021-12-14 16:48:51,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:51,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:51,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:51,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:51,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:51,573 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:51,583 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) [2021-12-14 16:48:51,583 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:51,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:51,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:52,073 INFO L129 PetriNetUnfolder]: 136/542 cut-off events. [2021-12-14 16:48:52,073 INFO L130 PetriNetUnfolder]: For 1421/1421 co-relation queries the response was YES. [2021-12-14 16:48:52,075 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 2902 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. [2021-12-14 16:48:52,078 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 98 selfloop transitions, 5 changer transitions 32/188 dead transitions. [2021-12-14 16:48:52,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 188 transitions, 1218 flow [2021-12-14 16:48:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 16:48:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-14 16:48:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1624 transitions. [2021-12-14 16:48:52,082 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2021-12-14 16:48:52,082 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1624 transitions. [2021-12-14 16:48:52,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1624 transitions. [2021-12-14 16:48:52,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:52,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1624 transitions. [2021-12-14 16:48:52,086 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) [2021-12-14 16:48:52,090 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) [2021-12-14 16:48:52,090 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) [2021-12-14 16:48:52,090 INFO L186 Difference]: Start difference. First operand has 133 places, 87 transitions, 283 flow. Second operand 24 states and 1624 transitions. [2021-12-14 16:48:52,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 188 transitions, 1218 flow [2021-12-14 16:48:52,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 188 transitions, 1110 flow, removed 51 selfloop flow, removed 11 redundant places. [2021-12-14 16:48:52,098 INFO L242 Difference]: Finished difference. Result has 150 places, 91 transitions, 369 flow [2021-12-14 16:48:52,098 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} [2021-12-14 16:48:52,098 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 59 predicate places. [2021-12-14 16:48:52,099 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 91 transitions, 369 flow [2021-12-14 16:48:52,099 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) [2021-12-14 16:48:52,099 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:52,099 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] [2021-12-14 16:48:52,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:48:52,100 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:52,100 INFO L85 PathProgramCache]: Analyzing trace with hash 64807340, now seen corresponding path program 1 times [2021-12-14 16:48:52,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:52,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634276555] [2021-12-14 16:48:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:52,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:52,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:52,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634276555] [2021-12-14 16:48:52,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634276555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:52,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:52,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:48:52,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177472101] [2021-12-14 16:48:52,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:52,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:48:52,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:52,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:48:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:48:52,174 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-14 16:48:52,175 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) [2021-12-14 16:48:52,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:52,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-14 16:48:52,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:52,271 INFO L129 PetriNetUnfolder]: 50/385 cut-off events. [2021-12-14 16:48:52,271 INFO L130 PetriNetUnfolder]: For 1727/1776 co-relation queries the response was YES. [2021-12-14 16:48:52,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1212 conditions, 385 events. 50/385 cut-off events. For 1727/1776 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1854 event pairs, 38 based on Foata normal form. 12/371 useless extension candidates. Maximal degree in co-relation 1171. Up to 43 conditions per place. [2021-12-14 16:48:52,285 INFO L132 encePairwiseOnDemand]: 94/102 looper letters, 18 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2021-12-14 16:48:52,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 100 transitions, 445 flow [2021-12-14 16:48:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:48:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-14 16:48:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2021-12-14 16:48:52,287 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8676470588235294 [2021-12-14 16:48:52,287 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2021-12-14 16:48:52,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2021-12-14 16:48:52,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:52,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2021-12-14 16:48:52,288 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) [2021-12-14 16:48:52,289 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) [2021-12-14 16:48:52,289 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) [2021-12-14 16:48:52,289 INFO L186 Difference]: Start difference. First operand has 150 places, 91 transitions, 369 flow. Second operand 4 states and 354 transitions. [2021-12-14 16:48:52,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 100 transitions, 445 flow [2021-12-14 16:48:52,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 100 transitions, 418 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-12-14 16:48:52,312 INFO L242 Difference]: Finished difference. Result has 126 places, 93 transitions, 376 flow [2021-12-14 16:48:52,312 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} [2021-12-14 16:48:52,314 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 35 predicate places. [2021-12-14 16:48:52,314 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 93 transitions, 376 flow [2021-12-14 16:48:52,315 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) [2021-12-14 16:48:52,315 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:52,315 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] [2021-12-14 16:48:52,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:48:52,315 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:52,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1234378536, now seen corresponding path program 3 times [2021-12-14 16:48:52,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:52,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448447074] [2021-12-14 16:48:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:52,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:52,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:52,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448447074] [2021-12-14 16:48:52,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448447074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:52,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:52,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:52,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485032758] [2021-12-14 16:48:52,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:52,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:52,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:52,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:52,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:52,469 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:52,470 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) [2021-12-14 16:48:52,470 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:52,470 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:52,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:52,772 INFO L129 PetriNetUnfolder]: 148/591 cut-off events. [2021-12-14 16:48:52,772 INFO L130 PetriNetUnfolder]: For 2119/2120 co-relation queries the response was YES. [2021-12-14 16:48:52,774 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 591 events. 148/591 cut-off events. For 2119/2120 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3299 event pairs, 90 based on Foata normal form. 1/580 useless extension candidates. Maximal degree in co-relation 2235. Up to 270 conditions per place. [2021-12-14 16:48:52,777 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 58 selfloop transitions, 12 changer transitions 25/150 dead transitions. [2021-12-14 16:48:52,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 150 transitions, 1101 flow [2021-12-14 16:48:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:48:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-14 16:48:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1348 transitions. [2021-12-14 16:48:52,780 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6607843137254902 [2021-12-14 16:48:52,780 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1348 transitions. [2021-12-14 16:48:52,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1348 transitions. [2021-12-14 16:48:52,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:52,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1348 transitions. [2021-12-14 16:48:52,783 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) [2021-12-14 16:48:52,786 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) [2021-12-14 16:48:52,787 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) [2021-12-14 16:48:52,787 INFO L186 Difference]: Start difference. First operand has 126 places, 93 transitions, 376 flow. Second operand 20 states and 1348 transitions. [2021-12-14 16:48:52,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 150 transitions, 1101 flow [2021-12-14 16:48:52,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 150 transitions, 1095 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-14 16:48:52,795 INFO L242 Difference]: Finished difference. Result has 160 places, 103 transitions, 559 flow [2021-12-14 16:48:52,796 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} [2021-12-14 16:48:52,796 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 69 predicate places. [2021-12-14 16:48:52,797 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 103 transitions, 559 flow [2021-12-14 16:48:52,797 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) [2021-12-14 16:48:52,797 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:52,797 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] [2021-12-14 16:48:52,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:48:52,798 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash -969644156, now seen corresponding path program 1 times [2021-12-14 16:48:52,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:52,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804017566] [2021-12-14 16:48:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:52,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:52,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:52,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804017566] [2021-12-14 16:48:52,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804017566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:52,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:52,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:48:52,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374058842] [2021-12-14 16:48:52,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:52,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:48:52,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:52,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:48:52,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:48:52,846 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-14 16:48:52,847 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) [2021-12-14 16:48:52,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:52,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-14 16:48:52,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:52,910 INFO L129 PetriNetUnfolder]: 61/422 cut-off events. [2021-12-14 16:48:52,910 INFO L130 PetriNetUnfolder]: For 2187/2233 co-relation queries the response was YES. [2021-12-14 16:48:52,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1504 conditions, 422 events. 61/422 cut-off events. For 2187/2233 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2222 event pairs, 47 based on Foata normal form. 14/415 useless extension candidates. Maximal degree in co-relation 1455. Up to 50 conditions per place. [2021-12-14 16:48:52,914 INFO L132 encePairwiseOnDemand]: 97/102 looper letters, 23 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2021-12-14 16:48:52,914 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 112 transitions, 644 flow [2021-12-14 16:48:52,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:48:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-14 16:48:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2021-12-14 16:48:52,916 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8676470588235294 [2021-12-14 16:48:52,916 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2021-12-14 16:48:52,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2021-12-14 16:48:52,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:52,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2021-12-14 16:48:52,917 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) [2021-12-14 16:48:52,918 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) [2021-12-14 16:48:52,918 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) [2021-12-14 16:48:52,918 INFO L186 Difference]: Start difference. First operand has 160 places, 103 transitions, 559 flow. Second operand 4 states and 354 transitions. [2021-12-14 16:48:52,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 112 transitions, 644 flow [2021-12-14 16:48:52,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 112 transitions, 579 flow, removed 29 selfloop flow, removed 10 redundant places. [2021-12-14 16:48:52,927 INFO L242 Difference]: Finished difference. Result has 143 places, 105 transitions, 520 flow [2021-12-14 16:48:52,927 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} [2021-12-14 16:48:52,929 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 52 predicate places. [2021-12-14 16:48:52,929 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 105 transitions, 520 flow [2021-12-14 16:48:52,930 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) [2021-12-14 16:48:52,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:52,930 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] [2021-12-14 16:48:52,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:48:52,930 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1504756170, now seen corresponding path program 2 times [2021-12-14 16:48:52,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:52,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347109785] [2021-12-14 16:48:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:52,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:52,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:52,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347109785] [2021-12-14 16:48:52,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347109785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:52,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:52,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:48:52,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583428607] [2021-12-14 16:48:52,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:52,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:48:52,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:52,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:48:52,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:48:52,983 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-14 16:48:52,983 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) [2021-12-14 16:48:52,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:52,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-14 16:48:52,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:53,058 INFO L129 PetriNetUnfolder]: 47/369 cut-off events. [2021-12-14 16:48:53,058 INFO L130 PetriNetUnfolder]: For 1465/1492 co-relation queries the response was YES. [2021-12-14 16:48:53,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 369 events. 47/369 cut-off events. For 1465/1492 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1807 event pairs, 31 based on Foata normal form. 12/364 useless extension candidates. Maximal degree in co-relation 1179. Up to 42 conditions per place. [2021-12-14 16:48:53,061 INFO L132 encePairwiseOnDemand]: 97/102 looper letters, 23 selfloop transitions, 6 changer transitions 0/114 dead transitions. [2021-12-14 16:48:53,061 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 114 transitions, 608 flow [2021-12-14 16:48:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:48:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-14 16:48:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 438 transitions. [2021-12-14 16:48:53,063 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8588235294117647 [2021-12-14 16:48:53,063 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 438 transitions. [2021-12-14 16:48:53,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 438 transitions. [2021-12-14 16:48:53,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:53,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 438 transitions. [2021-12-14 16:48:53,064 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) [2021-12-14 16:48:53,065 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) [2021-12-14 16:48:53,065 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) [2021-12-14 16:48:53,065 INFO L186 Difference]: Start difference. First operand has 143 places, 105 transitions, 520 flow. Second operand 5 states and 438 transitions. [2021-12-14 16:48:53,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 114 transitions, 608 flow [2021-12-14 16:48:53,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 114 transitions, 592 flow, removed 7 selfloop flow, removed 1 redundant places. [2021-12-14 16:48:53,075 INFO L242 Difference]: Finished difference. Result has 148 places, 107 transitions, 536 flow [2021-12-14 16:48:53,075 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} [2021-12-14 16:48:53,076 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 57 predicate places. [2021-12-14 16:48:53,076 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 107 transitions, 536 flow [2021-12-14 16:48:53,076 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) [2021-12-14 16:48:53,076 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:53,076 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] [2021-12-14 16:48:53,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:48:53,077 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:53,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:53,077 INFO L85 PathProgramCache]: Analyzing trace with hash -209784758, now seen corresponding path program 1 times [2021-12-14 16:48:53,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:53,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239182514] [2021-12-14 16:48:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:53,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:53,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:53,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239182514] [2021-12-14 16:48:53,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239182514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:53,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:53,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:53,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418624980] [2021-12-14 16:48:53,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:53,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:53,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:53,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:53,164 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:53,165 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) [2021-12-14 16:48:53,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:53,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:53,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:53,514 INFO L129 PetriNetUnfolder]: 121/525 cut-off events. [2021-12-14 16:48:53,515 INFO L130 PetriNetUnfolder]: For 2500/2506 co-relation queries the response was YES. [2021-12-14 16:48:53,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2133 conditions, 525 events. 121/525 cut-off events. For 2500/2506 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2835 event pairs, 66 based on Foata normal form. 1/518 useless extension candidates. Maximal degree in co-relation 2089. Up to 228 conditions per place. [2021-12-14 16:48:53,527 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 81 selfloop transitions, 5 changer transitions 41/186 dead transitions. [2021-12-14 16:48:53,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 186 transitions, 1365 flow [2021-12-14 16:48:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 16:48:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-14 16:48:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1626 transitions. [2021-12-14 16:48:53,529 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6642156862745098 [2021-12-14 16:48:53,541 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1626 transitions. [2021-12-14 16:48:53,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1626 transitions. [2021-12-14 16:48:53,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:53,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1626 transitions. [2021-12-14 16:48:53,544 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) [2021-12-14 16:48:53,547 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) [2021-12-14 16:48:53,547 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) [2021-12-14 16:48:53,548 INFO L186 Difference]: Start difference. First operand has 148 places, 107 transitions, 536 flow. Second operand 24 states and 1626 transitions. [2021-12-14 16:48:53,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 186 transitions, 1365 flow [2021-12-14 16:48:53,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 186 transitions, 1353 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-14 16:48:53,600 INFO L242 Difference]: Finished difference. Result has 187 places, 107 transitions, 575 flow [2021-12-14 16:48:53,601 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} [2021-12-14 16:48:53,601 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 96 predicate places. [2021-12-14 16:48:53,602 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 107 transitions, 575 flow [2021-12-14 16:48:53,602 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) [2021-12-14 16:48:53,602 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:53,602 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] [2021-12-14 16:48:53,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:48:53,602 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:53,603 INFO L85 PathProgramCache]: Analyzing trace with hash -327031736, now seen corresponding path program 2 times [2021-12-14 16:48:53,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:53,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945779320] [2021-12-14 16:48:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:53,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:53,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:53,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945779320] [2021-12-14 16:48:53,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945779320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:53,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:53,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:48:53,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733064681] [2021-12-14 16:48:53,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:53,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:48:53,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:48:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:48:53,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-14 16:48:53,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 107 transitions, 575 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) [2021-12-14 16:48:53,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:53,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-14 16:48:53,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:53,725 INFO L129 PetriNetUnfolder]: 36/306 cut-off events. [2021-12-14 16:48:53,725 INFO L130 PetriNetUnfolder]: For 1487/1494 co-relation queries the response was YES. [2021-12-14 16:48:53,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 306 events. 36/306 cut-off events. For 1487/1494 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1391 event pairs, 22 based on Foata normal form. 6/299 useless extension candidates. Maximal degree in co-relation 1069. Up to 34 conditions per place. [2021-12-14 16:48:53,728 INFO L132 encePairwiseOnDemand]: 95/102 looper letters, 21 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2021-12-14 16:48:53,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 114 transitions, 661 flow [2021-12-14 16:48:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:48:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-14 16:48:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 436 transitions. [2021-12-14 16:48:53,730 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8549019607843137 [2021-12-14 16:48:53,730 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 436 transitions. [2021-12-14 16:48:53,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 436 transitions. [2021-12-14 16:48:53,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:53,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 436 transitions. [2021-12-14 16:48:53,733 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) [2021-12-14 16:48:53,734 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) [2021-12-14 16:48:53,734 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) [2021-12-14 16:48:53,734 INFO L186 Difference]: Start difference. First operand has 187 places, 107 transitions, 575 flow. Second operand 5 states and 436 transitions. [2021-12-14 16:48:53,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 114 transitions, 661 flow [2021-12-14 16:48:53,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 114 transitions, 585 flow, removed 25 selfloop flow, removed 22 redundant places. [2021-12-14 16:48:53,741 INFO L242 Difference]: Finished difference. Result has 154 places, 109 transitions, 541 flow [2021-12-14 16:48:53,741 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=541, PETRI_PLACES=154, PETRI_TRANSITIONS=109} [2021-12-14 16:48:53,742 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 63 predicate places. [2021-12-14 16:48:53,742 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 109 transitions, 541 flow [2021-12-14 16:48:53,742 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) [2021-12-14 16:48:53,742 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:53,742 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] [2021-12-14 16:48:53,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:48:53,742 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:53,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1373768200, now seen corresponding path program 2 times [2021-12-14 16:48:53,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:53,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275614441] [2021-12-14 16:48:53,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:53,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:53,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:53,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275614441] [2021-12-14 16:48:53,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275614441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:53,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:53,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:53,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774450414] [2021-12-14 16:48:53,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:53,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:53,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:53,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:53,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:53,903 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:53,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 109 transitions, 541 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) [2021-12-14 16:48:53,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:53,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:53,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:54,273 INFO L129 PetriNetUnfolder]: 101/463 cut-off events. [2021-12-14 16:48:54,273 INFO L130 PetriNetUnfolder]: For 1777/1784 co-relation queries the response was YES. [2021-12-14 16:48:54,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 463 events. 101/463 cut-off events. For 1777/1784 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2374 event pairs, 45 based on Foata normal form. 1/459 useless extension candidates. Maximal degree in co-relation 1738. Up to 187 conditions per place. [2021-12-14 16:48:54,278 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 65 selfloop transitions, 12 changer transitions 32/170 dead transitions. [2021-12-14 16:48:54,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 170 transitions, 1333 flow [2021-12-14 16:48:54,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 16:48:54,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-14 16:48:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1482 transitions. [2021-12-14 16:48:54,280 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.660427807486631 [2021-12-14 16:48:54,280 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1482 transitions. [2021-12-14 16:48:54,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1482 transitions. [2021-12-14 16:48:54,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:54,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1482 transitions. [2021-12-14 16:48:54,283 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) [2021-12-14 16:48:54,286 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) [2021-12-14 16:48:54,286 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) [2021-12-14 16:48:54,286 INFO L186 Difference]: Start difference. First operand has 154 places, 109 transitions, 541 flow. Second operand 22 states and 1482 transitions. [2021-12-14 16:48:54,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 170 transitions, 1333 flow [2021-12-14 16:48:54,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 170 transitions, 1201 flow, removed 62 selfloop flow, removed 8 redundant places. [2021-12-14 16:48:54,298 INFO L242 Difference]: Finished difference. Result has 181 places, 119 transitions, 677 flow [2021-12-14 16:48:54,298 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=677, PETRI_PLACES=181, PETRI_TRANSITIONS=119} [2021-12-14 16:48:54,299 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 90 predicate places. [2021-12-14 16:48:54,299 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 119 transitions, 677 flow [2021-12-14 16:48:54,299 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) [2021-12-14 16:48:54,305 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:54,305 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] [2021-12-14 16:48:54,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:48:54,306 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:54,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:54,306 INFO L85 PathProgramCache]: Analyzing trace with hash -725426182, now seen corresponding path program 3 times [2021-12-14 16:48:54,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:54,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187644505] [2021-12-14 16:48:54,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:54,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:54,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:54,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187644505] [2021-12-14 16:48:54,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187644505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:54,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:54,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:54,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061809867] [2021-12-14 16:48:54,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:54,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:54,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:54,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:54,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:54,505 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:54,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 119 transitions, 677 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) [2021-12-14 16:48:54,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:54,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:54,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:54,845 INFO L129 PetriNetUnfolder]: 117/531 cut-off events. [2021-12-14 16:48:54,845 INFO L130 PetriNetUnfolder]: For 2626/2636 co-relation queries the response was YES. [2021-12-14 16:48:54,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2235 conditions, 531 events. 117/531 cut-off events. For 2626/2636 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2852 event pairs, 64 based on Foata normal form. 1/523 useless extension candidates. Maximal degree in co-relation 2180. Up to 190 conditions per place. [2021-12-14 16:48:54,850 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 67 selfloop transitions, 19 changer transitions 32/179 dead transitions. [2021-12-14 16:48:54,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 179 transitions, 1550 flow [2021-12-14 16:48:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:48:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-14 16:48:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1355 transitions. [2021-12-14 16:48:54,853 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6642156862745098 [2021-12-14 16:48:54,853 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1355 transitions. [2021-12-14 16:48:54,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1355 transitions. [2021-12-14 16:48:54,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:54,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1355 transitions. [2021-12-14 16:48:54,855 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) [2021-12-14 16:48:54,858 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) [2021-12-14 16:48:54,858 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) [2021-12-14 16:48:54,858 INFO L186 Difference]: Start difference. First operand has 181 places, 119 transitions, 677 flow. Second operand 20 states and 1355 transitions. [2021-12-14 16:48:54,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 179 transitions, 1550 flow [2021-12-14 16:48:54,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 179 transitions, 1308 flow, removed 121 selfloop flow, removed 11 redundant places. [2021-12-14 16:48:54,871 INFO L242 Difference]: Finished difference. Result has 192 places, 129 transitions, 775 flow [2021-12-14 16:48:54,871 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=775, PETRI_PLACES=192, PETRI_TRANSITIONS=129} [2021-12-14 16:48:54,872 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 101 predicate places. [2021-12-14 16:48:54,872 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 129 transitions, 775 flow [2021-12-14 16:48:54,872 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) [2021-12-14 16:48:54,872 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:54,872 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] [2021-12-14 16:48:54,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:48:54,873 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:54,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:54,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1317621250, now seen corresponding path program 4 times [2021-12-14 16:48:54,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:54,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171148807] [2021-12-14 16:48:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:54,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:55,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:55,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171148807] [2021-12-14 16:48:55,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171148807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:55,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:55,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:55,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574687504] [2021-12-14 16:48:55,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:55,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:55,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:55,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:55,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:55,006 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:55,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 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) [2021-12-14 16:48:55,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:55,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:55,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:55,635 INFO L129 PetriNetUnfolder]: 114/502 cut-off events. [2021-12-14 16:48:55,635 INFO L130 PetriNetUnfolder]: For 3045/3058 co-relation queries the response was YES. [2021-12-14 16:48:55,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2298 conditions, 502 events. 114/502 cut-off events. For 3045/3058 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2702 event pairs, 41 based on Foata normal form. 1/494 useless extension candidates. Maximal degree in co-relation 2236. Up to 151 conditions per place. [2021-12-14 16:48:55,653 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 102 selfloop transitions, 17 changer transitions 45/225 dead transitions. [2021-12-14 16:48:55,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 225 transitions, 2048 flow [2021-12-14 16:48:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 16:48:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-14 16:48:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1623 transitions. [2021-12-14 16:48:55,655 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6629901960784313 [2021-12-14 16:48:55,655 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1623 transitions. [2021-12-14 16:48:55,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1623 transitions. [2021-12-14 16:48:55,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:55,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1623 transitions. [2021-12-14 16:48:55,658 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) [2021-12-14 16:48:55,661 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) [2021-12-14 16:48:55,662 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) [2021-12-14 16:48:55,675 INFO L186 Difference]: Start difference. First operand has 192 places, 129 transitions, 775 flow. Second operand 24 states and 1623 transitions. [2021-12-14 16:48:55,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 225 transitions, 2048 flow [2021-12-14 16:48:55,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 225 transitions, 1793 flow, removed 118 selfloop flow, removed 14 redundant places. [2021-12-14 16:48:55,703 INFO L242 Difference]: Finished difference. Result has 207 places, 129 transitions, 800 flow [2021-12-14 16:48:55,703 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=800, PETRI_PLACES=207, PETRI_TRANSITIONS=129} [2021-12-14 16:48:55,704 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 116 predicate places. [2021-12-14 16:48:55,704 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 129 transitions, 800 flow [2021-12-14 16:48:55,705 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) [2021-12-14 16:48:55,705 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:55,705 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] [2021-12-14 16:48:55,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:48:55,705 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:55,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1291743776, now seen corresponding path program 5 times [2021-12-14 16:48:55,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:55,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081442420] [2021-12-14 16:48:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:55,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:55,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:55,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081442420] [2021-12-14 16:48:55,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081442420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:55,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:55,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:55,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157795746] [2021-12-14 16:48:55,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:55,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:55,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:55,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:55,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:55,890 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:55,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 129 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) [2021-12-14 16:48:55,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:55,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:55,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:56,286 INFO L129 PetriNetUnfolder]: 107/494 cut-off events. [2021-12-14 16:48:56,286 INFO L130 PetriNetUnfolder]: For 2398/2412 co-relation queries the response was YES. [2021-12-14 16:48:56,289 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2161 conditions, 494 events. 107/494 cut-off events. For 2398/2412 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2654 event pairs, 49 based on Foata normal form. 3/489 useless extension candidates. Maximal degree in co-relation 2094. Up to 207 conditions per place. [2021-12-14 16:48:56,292 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 66 selfloop transitions, 21 changer transitions 25/173 dead transitions. [2021-12-14 16:48:56,292 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 173 transitions, 1468 flow [2021-12-14 16:48:56,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:48:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:48:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1218 transitions. [2021-12-14 16:48:56,296 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2021-12-14 16:48:56,296 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1218 transitions. [2021-12-14 16:48:56,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1218 transitions. [2021-12-14 16:48:56,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:56,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1218 transitions. [2021-12-14 16:48:56,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.66666666666667) internal successors, (1218), 18 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:48:56,302 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) [2021-12-14 16:48:56,302 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) [2021-12-14 16:48:56,302 INFO L186 Difference]: Start difference. First operand has 207 places, 129 transitions, 800 flow. Second operand 18 states and 1218 transitions. [2021-12-14 16:48:56,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 173 transitions, 1468 flow [2021-12-14 16:48:56,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 173 transitions, 1301 flow, removed 40 selfloop flow, removed 22 redundant places. [2021-12-14 16:48:56,314 INFO L242 Difference]: Finished difference. Result has 193 places, 139 transitions, 908 flow [2021-12-14 16:48:56,315 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=908, PETRI_PLACES=193, PETRI_TRANSITIONS=139} [2021-12-14 16:48:56,316 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 102 predicate places. [2021-12-14 16:48:56,316 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 139 transitions, 908 flow [2021-12-14 16:48:56,316 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) [2021-12-14 16:48:56,316 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:56,316 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] [2021-12-14 16:48:56,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:48:56,317 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash 910084234, now seen corresponding path program 6 times [2021-12-14 16:48:56,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:56,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656297402] [2021-12-14 16:48:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:56,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:56,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:56,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656297402] [2021-12-14 16:48:56,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656297402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:56,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:56,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:56,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926411869] [2021-12-14 16:48:56,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:56,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:56,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:56,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:56,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:56,446 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:56,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 139 transitions, 908 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) [2021-12-14 16:48:56,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:56,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:56,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:56,758 INFO L129 PetriNetUnfolder]: 106/519 cut-off events. [2021-12-14 16:48:56,758 INFO L130 PetriNetUnfolder]: For 2167/2180 co-relation queries the response was YES. [2021-12-14 16:48:56,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2113 conditions, 519 events. 106/519 cut-off events. For 2167/2180 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2838 event pairs, 45 based on Foata normal form. 1/512 useless extension candidates. Maximal degree in co-relation 2055. Up to 197 conditions per place. [2021-12-14 16:48:56,765 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 82 selfloop transitions, 20 changer transitions 32/195 dead transitions. [2021-12-14 16:48:56,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 195 transitions, 1758 flow [2021-12-14 16:48:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 16:48:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-14 16:48:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1421 transitions. [2021-12-14 16:48:56,770 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2021-12-14 16:48:56,770 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1421 transitions. [2021-12-14 16:48:56,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1421 transitions. [2021-12-14 16:48:56,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:56,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1421 transitions. [2021-12-14 16:48:56,774 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) [2021-12-14 16:48:56,776 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) [2021-12-14 16:48:56,777 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) [2021-12-14 16:48:56,778 INFO L186 Difference]: Start difference. First operand has 193 places, 139 transitions, 908 flow. Second operand 21 states and 1421 transitions. [2021-12-14 16:48:56,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 195 transitions, 1758 flow [2021-12-14 16:48:56,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 195 transitions, 1622 flow, removed 68 selfloop flow, removed 4 redundant places. [2021-12-14 16:48:56,793 INFO L242 Difference]: Finished difference. Result has 217 places, 147 transitions, 1028 flow [2021-12-14 16:48:56,794 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1028, PETRI_PLACES=217, PETRI_TRANSITIONS=147} [2021-12-14 16:48:56,794 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 126 predicate places. [2021-12-14 16:48:56,796 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 147 transitions, 1028 flow [2021-12-14 16:48:56,796 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) [2021-12-14 16:48:56,796 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:56,796 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] [2021-12-14 16:48:56,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:48:56,797 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:56,797 INFO L85 PathProgramCache]: Analyzing trace with hash -31507484, now seen corresponding path program 7 times [2021-12-14 16:48:56,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:56,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778775889] [2021-12-14 16:48:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:56,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:56,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:56,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778775889] [2021-12-14 16:48:56,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778775889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:56,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:56,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:56,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468283670] [2021-12-14 16:48:56,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:56,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:56,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:56,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:56,933 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:56,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 147 transitions, 1028 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) [2021-12-14 16:48:56,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:56,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:56,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:57,327 INFO L129 PetriNetUnfolder]: 101/509 cut-off events. [2021-12-14 16:48:57,355 INFO L130 PetriNetUnfolder]: For 2854/2873 co-relation queries the response was YES. [2021-12-14 16:48:57,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2220 conditions, 509 events. 101/509 cut-off events. For 2854/2873 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2832 event pairs, 47 based on Foata normal form. 1/501 useless extension candidates. Maximal degree in co-relation 2148. Up to 210 conditions per place. [2021-12-14 16:48:57,362 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 76 selfloop transitions, 26 changer transitions 39/202 dead transitions. [2021-12-14 16:48:57,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 202 transitions, 1984 flow [2021-12-14 16:48:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:48:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-14 16:48:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2021-12-14 16:48:57,364 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6622549019607843 [2021-12-14 16:48:57,364 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2021-12-14 16:48:57,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2021-12-14 16:48:57,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:57,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2021-12-14 16:48:57,377 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) [2021-12-14 16:48:57,382 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) [2021-12-14 16:48:57,383 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) [2021-12-14 16:48:57,391 INFO L186 Difference]: Start difference. First operand has 217 places, 147 transitions, 1028 flow. Second operand 20 states and 1351 transitions. [2021-12-14 16:48:57,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 202 transitions, 1984 flow [2021-12-14 16:48:57,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 202 transitions, 1824 flow, removed 74 selfloop flow, removed 12 redundant places. [2021-12-14 16:48:57,434 INFO L242 Difference]: Finished difference. Result has 226 places, 153 transitions, 1178 flow [2021-12-14 16:48:57,443 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1178, PETRI_PLACES=226, PETRI_TRANSITIONS=153} [2021-12-14 16:48:57,444 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 135 predicate places. [2021-12-14 16:48:57,455 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 153 transitions, 1178 flow [2021-12-14 16:48:57,456 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) [2021-12-14 16:48:57,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:57,456 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:48:57,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:48:57,456 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:57,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:57,457 INFO L85 PathProgramCache]: Analyzing trace with hash 297255832, now seen corresponding path program 8 times [2021-12-14 16:48:57,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:57,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244916509] [2021-12-14 16:48:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:57,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:57,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:57,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244916509] [2021-12-14 16:48:57,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244916509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:57,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:57,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:57,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166606475] [2021-12-14 16:48:57,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:57,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:57,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:57,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:57,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:57,614 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:57,615 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 153 transitions, 1178 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) [2021-12-14 16:48:57,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:57,615 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:57,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:57,900 INFO L129 PetriNetUnfolder]: 90/459 cut-off events. [2021-12-14 16:48:57,901 INFO L130 PetriNetUnfolder]: For 2591/2610 co-relation queries the response was YES. [2021-12-14 16:48:57,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 459 events. 90/459 cut-off events. For 2591/2610 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2409 event pairs, 45 based on Foata normal form. 3/454 useless extension candidates. Maximal degree in co-relation 1936. Up to 196 conditions per place. [2021-12-14 16:48:57,906 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 69 selfloop transitions, 14 changer transitions 34/178 dead transitions. [2021-12-14 16:48:57,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 178 transitions, 1671 flow [2021-12-14 16:48:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:48:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-14 16:48:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1085 transitions. [2021-12-14 16:48:57,910 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.664828431372549 [2021-12-14 16:48:57,910 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1085 transitions. [2021-12-14 16:48:57,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1085 transitions. [2021-12-14 16:48:57,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:57,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1085 transitions. [2021-12-14 16:48:57,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.8125) internal successors, (1085), 16 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:48:57,914 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) [2021-12-14 16:48:57,914 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) [2021-12-14 16:48:57,914 INFO L186 Difference]: Start difference. First operand has 226 places, 153 transitions, 1178 flow. Second operand 16 states and 1085 transitions. [2021-12-14 16:48:57,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 178 transitions, 1671 flow [2021-12-14 16:48:57,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 178 transitions, 1525 flow, removed 49 selfloop flow, removed 16 redundant places. [2021-12-14 16:48:57,928 INFO L242 Difference]: Finished difference. Result has 218 places, 137 transitions, 910 flow [2021-12-14 16:48:57,928 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=910, PETRI_PLACES=218, PETRI_TRANSITIONS=137} [2021-12-14 16:48:57,929 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 127 predicate places. [2021-12-14 16:48:57,929 INFO L470 AbstractCegarLoop]: Abstraction has has 218 places, 137 transitions, 910 flow [2021-12-14 16:48:57,929 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) [2021-12-14 16:48:57,929 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:57,929 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] [2021-12-14 16:48:57,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:48:57,930 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:57,930 INFO L85 PathProgramCache]: Analyzing trace with hash -940619772, now seen corresponding path program 9 times [2021-12-14 16:48:57,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:57,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509963350] [2021-12-14 16:48:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:57,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:58,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:58,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509963350] [2021-12-14 16:48:58,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509963350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:58,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:58,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:58,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239427558] [2021-12-14 16:48:58,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:58,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:58,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:58,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:58,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:58,027 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:58,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 137 transitions, 910 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) [2021-12-14 16:48:58,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:58,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:58,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:58,289 INFO L129 PetriNetUnfolder]: 93/463 cut-off events. [2021-12-14 16:48:58,289 INFO L130 PetriNetUnfolder]: For 2030/2042 co-relation queries the response was YES. [2021-12-14 16:48:58,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 463 events. 93/463 cut-off events. For 2030/2042 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2424 event pairs, 49 based on Foata normal form. 1/455 useless extension candidates. Maximal degree in co-relation 1887. Up to 196 conditions per place. [2021-12-14 16:48:58,294 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 67 selfloop transitions, 23 changer transitions 25/176 dead transitions. [2021-12-14 16:48:58,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 176 transitions, 1558 flow [2021-12-14 16:48:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:48:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:48:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1219 transitions. [2021-12-14 16:48:58,296 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6639433551198257 [2021-12-14 16:48:58,296 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1219 transitions. [2021-12-14 16:48:58,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1219 transitions. [2021-12-14 16:48:58,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:58,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1219 transitions. [2021-12-14 16:48:58,298 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) [2021-12-14 16:48:58,300 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) [2021-12-14 16:48:58,300 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) [2021-12-14 16:48:58,301 INFO L186 Difference]: Start difference. First operand has 218 places, 137 transitions, 910 flow. Second operand 18 states and 1219 transitions. [2021-12-14 16:48:58,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 176 transitions, 1558 flow [2021-12-14 16:48:58,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 176 transitions, 1401 flow, removed 30 selfloop flow, removed 16 redundant places. [2021-12-14 16:48:58,312 INFO L242 Difference]: Finished difference. Result has 207 places, 146 transitions, 1022 flow [2021-12-14 16:48:58,312 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1022, PETRI_PLACES=207, PETRI_TRANSITIONS=146} [2021-12-14 16:48:58,312 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 116 predicate places. [2021-12-14 16:48:58,312 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 146 transitions, 1022 flow [2021-12-14 16:48:58,313 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) [2021-12-14 16:48:58,313 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:58,313 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] [2021-12-14 16:48:58,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:48:58,313 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash -97554064, now seen corresponding path program 10 times [2021-12-14 16:48:58,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:58,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680746172] [2021-12-14 16:48:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:58,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:58,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:58,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680746172] [2021-12-14 16:48:58,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680746172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:58,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:58,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:58,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968476643] [2021-12-14 16:48:58,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:58,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:58,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:58,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:58,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:58,410 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:58,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 146 transitions, 1022 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) [2021-12-14 16:48:58,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:58,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:58,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:58,714 INFO L129 PetriNetUnfolder]: 90/456 cut-off events. [2021-12-14 16:48:58,714 INFO L130 PetriNetUnfolder]: For 1635/1652 co-relation queries the response was YES. [2021-12-14 16:48:58,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1857 conditions, 456 events. 90/456 cut-off events. For 1635/1652 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2380 event pairs, 46 based on Foata normal form. 3/450 useless extension candidates. Maximal degree in co-relation 1792. Up to 196 conditions per place. [2021-12-14 16:48:58,719 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 68 selfloop transitions, 24 changer transitions 26/179 dead transitions. [2021-12-14 16:48:58,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 179 transitions, 1586 flow [2021-12-14 16:48:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:48:58,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-14 16:48:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1155 transitions. [2021-12-14 16:48:58,722 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6660899653979239 [2021-12-14 16:48:58,722 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1155 transitions. [2021-12-14 16:48:58,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1155 transitions. [2021-12-14 16:48:58,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:58,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1155 transitions. [2021-12-14 16:48:58,725 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) [2021-12-14 16:48:58,727 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) [2021-12-14 16:48:58,727 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) [2021-12-14 16:48:58,727 INFO L186 Difference]: Start difference. First operand has 207 places, 146 transitions, 1022 flow. Second operand 17 states and 1155 transitions. [2021-12-14 16:48:58,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 179 transitions, 1586 flow [2021-12-14 16:48:58,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 179 transitions, 1529 flow, removed 23 selfloop flow, removed 5 redundant places. [2021-12-14 16:48:58,743 INFO L242 Difference]: Finished difference. Result has 218 places, 149 transitions, 1105 flow [2021-12-14 16:48:58,744 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1105, PETRI_PLACES=218, PETRI_TRANSITIONS=149} [2021-12-14 16:48:58,744 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 127 predicate places. [2021-12-14 16:48:58,744 INFO L470 AbstractCegarLoop]: Abstraction has has 218 places, 149 transitions, 1105 flow [2021-12-14 16:48:58,745 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) [2021-12-14 16:48:58,745 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:58,745 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] [2021-12-14 16:48:58,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:48:58,746 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:58,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:58,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1696586704, now seen corresponding path program 11 times [2021-12-14 16:48:58,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:58,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179101667] [2021-12-14 16:48:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:58,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:58,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:58,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179101667] [2021-12-14 16:48:58,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179101667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:58,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:58,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:58,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821140276] [2021-12-14 16:48:58,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:58,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:58,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:58,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:58,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:58,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:58,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 149 transitions, 1105 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) [2021-12-14 16:48:58,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:58,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:58,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:59,177 INFO L129 PetriNetUnfolder]: 87/458 cut-off events. [2021-12-14 16:48:59,178 INFO L130 PetriNetUnfolder]: For 1732/1744 co-relation queries the response was YES. [2021-12-14 16:48:59,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1855 conditions, 458 events. 87/458 cut-off events. For 1732/1744 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2428 event pairs, 49 based on Foata normal form. 1/449 useless extension candidates. Maximal degree in co-relation 1785. Up to 196 conditions per place. [2021-12-14 16:48:59,184 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 67 selfloop transitions, 15 changer transitions 33/176 dead transitions. [2021-12-14 16:48:59,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 176 transitions, 1576 flow [2021-12-14 16:48:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:48:59,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:48:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1218 transitions. [2021-12-14 16:48:59,186 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2021-12-14 16:48:59,186 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1218 transitions. [2021-12-14 16:48:59,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1218 transitions. [2021-12-14 16:48:59,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:59,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1218 transitions. [2021-12-14 16:48:59,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.66666666666667) internal successors, (1218), 18 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:48:59,190 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) [2021-12-14 16:48:59,191 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) [2021-12-14 16:48:59,191 INFO L186 Difference]: Start difference. First operand has 218 places, 149 transitions, 1105 flow. Second operand 18 states and 1218 transitions. [2021-12-14 16:48:59,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 176 transitions, 1576 flow [2021-12-14 16:48:59,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 176 transitions, 1477 flow, removed 28 selfloop flow, removed 7 redundant places. [2021-12-14 16:48:59,207 INFO L242 Difference]: Finished difference. Result has 228 places, 140 transitions, 959 flow [2021-12-14 16:48:59,207 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=959, PETRI_PLACES=228, PETRI_TRANSITIONS=140} [2021-12-14 16:48:59,207 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 137 predicate places. [2021-12-14 16:48:59,208 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 140 transitions, 959 flow [2021-12-14 16:48:59,208 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) [2021-12-14 16:48:59,208 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:59,208 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] [2021-12-14 16:48:59,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:48:59,209 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash -802467334, now seen corresponding path program 12 times [2021-12-14 16:48:59,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:59,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215959830] [2021-12-14 16:48:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:59,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:59,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:59,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215959830] [2021-12-14 16:48:59,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215959830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:59,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:59,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:59,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292555010] [2021-12-14 16:48:59,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:59,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:59,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:59,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:59,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:59,470 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:59,471 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 140 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) [2021-12-14 16:48:59,471 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:59,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:59,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:48:59,689 INFO L129 PetriNetUnfolder]: 77/415 cut-off events. [2021-12-14 16:48:59,690 INFO L130 PetriNetUnfolder]: For 1561/1573 co-relation queries the response was YES. [2021-12-14 16:48:59,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1631 conditions, 415 events. 77/415 cut-off events. For 1561/1573 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2063 event pairs, 45 based on Foata normal form. 1/408 useless extension candidates. Maximal degree in co-relation 1558. Up to 183 conditions per place. [2021-12-14 16:48:59,694 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 58 selfloop transitions, 3 changer transitions 38/160 dead transitions. [2021-12-14 16:48:59,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 160 transitions, 1287 flow [2021-12-14 16:48:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:48:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-14 16:48:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1146 transitions. [2021-12-14 16:48:59,696 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6608996539792388 [2021-12-14 16:48:59,696 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1146 transitions. [2021-12-14 16:48:59,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1146 transitions. [2021-12-14 16:48:59,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:48:59,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1146 transitions. [2021-12-14 16:48:59,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.41176470588235) internal successors, (1146), 17 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:48:59,712 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) [2021-12-14 16:48:59,713 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) [2021-12-14 16:48:59,713 INFO L186 Difference]: Start difference. First operand has 228 places, 140 transitions, 959 flow. Second operand 17 states and 1146 transitions. [2021-12-14 16:48:59,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 160 transitions, 1287 flow [2021-12-14 16:48:59,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 160 transitions, 1166 flow, removed 29 selfloop flow, removed 21 redundant places. [2021-12-14 16:48:59,723 INFO L242 Difference]: Finished difference. Result has 211 places, 120 transitions, 644 flow [2021-12-14 16:48:59,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=644, PETRI_PLACES=211, PETRI_TRANSITIONS=120} [2021-12-14 16:48:59,724 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 120 predicate places. [2021-12-14 16:48:59,724 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 120 transitions, 644 flow [2021-12-14 16:48:59,724 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) [2021-12-14 16:48:59,732 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:48:59,732 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] [2021-12-14 16:48:59,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:48:59,732 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:48:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:48:59,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1281056072, now seen corresponding path program 13 times [2021-12-14 16:48:59,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:48:59,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586209919] [2021-12-14 16:48:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:48:59,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:48:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:48:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:48:59,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:48:59,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586209919] [2021-12-14 16:48:59,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586209919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:48:59,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:48:59,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:48:59,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589141042] [2021-12-14 16:48:59,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:48:59,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:48:59,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:48:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:48:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:48:59,937 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:48:59,937 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 120 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) [2021-12-14 16:48:59,937 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:48:59,937 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:48:59,937 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:00,412 INFO L129 PetriNetUnfolder]: 82/424 cut-off events. [2021-12-14 16:49:00,423 INFO L130 PetriNetUnfolder]: For 1326/1333 co-relation queries the response was YES. [2021-12-14 16:49:00,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 424 events. 82/424 cut-off events. For 1326/1333 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2082 event pairs, 40 based on Foata normal form. 1/420 useless extension candidates. Maximal degree in co-relation 1532. Up to 163 conditions per place. [2021-12-14 16:49:00,428 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 63 selfloop transitions, 22 changer transitions 32/178 dead transitions. [2021-12-14 16:49:00,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 178 transitions, 1412 flow [2021-12-14 16:49:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 16:49:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-14 16:49:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1479 transitions. [2021-12-14 16:49:00,433 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2021-12-14 16:49:00,433 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1479 transitions. [2021-12-14 16:49:00,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1479 transitions. [2021-12-14 16:49:00,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:00,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1479 transitions. [2021-12-14 16:49:00,449 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) [2021-12-14 16:49:00,452 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) [2021-12-14 16:49:00,452 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) [2021-12-14 16:49:00,452 INFO L186 Difference]: Start difference. First operand has 211 places, 120 transitions, 644 flow. Second operand 22 states and 1479 transitions. [2021-12-14 16:49:00,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 178 transitions, 1412 flow [2021-12-14 16:49:00,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 178 transitions, 1203 flow, removed 36 selfloop flow, removed 24 redundant places. [2021-12-14 16:49:00,461 INFO L242 Difference]: Finished difference. Result has 193 places, 132 transitions, 776 flow [2021-12-14 16:49:00,468 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=776, PETRI_PLACES=193, PETRI_TRANSITIONS=132} [2021-12-14 16:49:00,469 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 102 predicate places. [2021-12-14 16:49:00,469 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 132 transitions, 776 flow [2021-12-14 16:49:00,469 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) [2021-12-14 16:49:00,469 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:00,470 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] [2021-12-14 16:49:00,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 16:49:00,470 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:00,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:00,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1321167298, now seen corresponding path program 14 times [2021-12-14 16:49:00,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:00,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920095237] [2021-12-14 16:49:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:00,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:00,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:00,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920095237] [2021-12-14 16:49:00,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920095237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:00,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:00,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:00,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217410713] [2021-12-14 16:49:00,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:00,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:00,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:00,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:00,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:00,608 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:00,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 132 transitions, 776 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) [2021-12-14 16:49:00,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:00,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:00,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:00,926 INFO L129 PetriNetUnfolder]: 83/425 cut-off events. [2021-12-14 16:49:00,932 INFO L130 PetriNetUnfolder]: For 1178/1185 co-relation queries the response was YES. [2021-12-14 16:49:00,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1633 conditions, 425 events. 83/425 cut-off events. For 1178/1185 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2125 event pairs, 42 based on Foata normal form. 1/420 useless extension candidates. Maximal degree in co-relation 1575. Up to 169 conditions per place. [2021-12-14 16:49:00,953 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 58 selfloop transitions, 27 changer transitions 26/172 dead transitions. [2021-12-14 16:49:00,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 172 transitions, 1343 flow [2021-12-14 16:49:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:49:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-14 16:49:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1151 transitions. [2021-12-14 16:49:00,955 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6637831603229527 [2021-12-14 16:49:00,955 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1151 transitions. [2021-12-14 16:49:00,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1151 transitions. [2021-12-14 16:49:00,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:00,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1151 transitions. [2021-12-14 16:49:00,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.70588235294117) internal successors, (1151), 17 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:00,959 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) [2021-12-14 16:49:00,959 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) [2021-12-14 16:49:00,959 INFO L186 Difference]: Start difference. First operand has 193 places, 132 transitions, 776 flow. Second operand 17 states and 1151 transitions. [2021-12-14 16:49:00,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 172 transitions, 1343 flow [2021-12-14 16:49:00,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 172 transitions, 1244 flow, removed 43 selfloop flow, removed 11 redundant places. [2021-12-14 16:49:00,967 INFO L242 Difference]: Finished difference. Result has 194 places, 140 transitions, 902 flow [2021-12-14 16:49:00,967 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=902, PETRI_PLACES=194, PETRI_TRANSITIONS=140} [2021-12-14 16:49:00,968 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 103 predicate places. [2021-12-14 16:49:00,968 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 140 transitions, 902 flow [2021-12-14 16:49:00,968 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) [2021-12-14 16:49:00,968 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:00,969 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] [2021-12-14 16:49:00,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 16:49:00,969 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:00,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:00,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1555389636, now seen corresponding path program 15 times [2021-12-14 16:49:00,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:00,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153481508] [2021-12-14 16:49:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:00,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:01,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:01,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153481508] [2021-12-14 16:49:01,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153481508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:01,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:01,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:01,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965563357] [2021-12-14 16:49:01,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:01,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:01,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:01,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:01,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:01,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:01,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 140 transitions, 902 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) [2021-12-14 16:49:01,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:01,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:01,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:01,452 INFO L129 PetriNetUnfolder]: 82/443 cut-off events. [2021-12-14 16:49:01,453 INFO L130 PetriNetUnfolder]: For 1252/1259 co-relation queries the response was YES. [2021-12-14 16:49:01,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 443 events. 82/443 cut-off events. For 1252/1259 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2267 event pairs, 41 based on Foata normal form. 1/439 useless extension candidates. Maximal degree in co-relation 1641. Up to 170 conditions per place. [2021-12-14 16:49:01,471 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 63 selfloop transitions, 26 changer transitions 29/179 dead transitions. [2021-12-14 16:49:01,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 179 transitions, 1469 flow [2021-12-14 16:49:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:49:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-14 16:49:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1090 transitions. [2021-12-14 16:49:01,476 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6678921568627451 [2021-12-14 16:49:01,476 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1090 transitions. [2021-12-14 16:49:01,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1090 transitions. [2021-12-14 16:49:01,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:01,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1090 transitions. [2021-12-14 16:49:01,480 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) [2021-12-14 16:49:01,482 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) [2021-12-14 16:49:01,482 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) [2021-12-14 16:49:01,482 INFO L186 Difference]: Start difference. First operand has 194 places, 140 transitions, 902 flow. Second operand 16 states and 1090 transitions. [2021-12-14 16:49:01,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 179 transitions, 1469 flow [2021-12-14 16:49:01,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 179 transitions, 1376 flow, removed 21 selfloop flow, removed 8 redundant places. [2021-12-14 16:49:01,501 INFO L242 Difference]: Finished difference. Result has 202 places, 144 transitions, 963 flow [2021-12-14 16:49:01,502 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=963, PETRI_PLACES=202, PETRI_TRANSITIONS=144} [2021-12-14 16:49:01,503 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 111 predicate places. [2021-12-14 16:49:01,503 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 144 transitions, 963 flow [2021-12-14 16:49:01,503 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) [2021-12-14 16:49:01,503 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:01,504 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:49:01,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-14 16:49:01,504 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:01,504 INFO L85 PathProgramCache]: Analyzing trace with hash 700556136, now seen corresponding path program 16 times [2021-12-14 16:49:01,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:01,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889126268] [2021-12-14 16:49:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:01,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:01,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:01,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889126268] [2021-12-14 16:49:01,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889126268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:01,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:01,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:01,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828920452] [2021-12-14 16:49:01,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:01,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:01,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:01,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:01,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:01,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:01,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 144 transitions, 963 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) [2021-12-14 16:49:01,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:01,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:01,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:02,059 INFO L129 PetriNetUnfolder]: 80/431 cut-off events. [2021-12-14 16:49:02,059 INFO L130 PetriNetUnfolder]: For 1451/1458 co-relation queries the response was YES. [2021-12-14 16:49:02,062 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1722 conditions, 431 events. 80/431 cut-off events. For 1451/1458 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2181 event pairs, 37 based on Foata normal form. 1/426 useless extension candidates. Maximal degree in co-relation 1660. Up to 161 conditions per place. [2021-12-14 16:49:02,063 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 69 selfloop transitions, 25 changer transitions 32/187 dead transitions. [2021-12-14 16:49:02,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 187 transitions, 1656 flow [2021-12-14 16:49:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 16:49:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-14 16:49:02,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1413 transitions. [2021-12-14 16:49:02,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6596638655462185 [2021-12-14 16:49:02,066 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1413 transitions. [2021-12-14 16:49:02,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1413 transitions. [2021-12-14 16:49:02,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:02,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1413 transitions. [2021-12-14 16:49:02,068 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) [2021-12-14 16:49:02,073 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) [2021-12-14 16:49:02,073 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) [2021-12-14 16:49:02,073 INFO L186 Difference]: Start difference. First operand has 202 places, 144 transitions, 963 flow. Second operand 21 states and 1413 transitions. [2021-12-14 16:49:02,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 187 transitions, 1656 flow [2021-12-14 16:49:02,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 187 transitions, 1544 flow, removed 29 selfloop flow, removed 8 redundant places. [2021-12-14 16:49:02,083 INFO L242 Difference]: Finished difference. Result has 220 places, 145 transitions, 1015 flow [2021-12-14 16:49:02,084 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1015, PETRI_PLACES=220, PETRI_TRANSITIONS=145} [2021-12-14 16:49:02,084 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 129 predicate places. [2021-12-14 16:49:02,084 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 145 transitions, 1015 flow [2021-12-14 16:49:02,084 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) [2021-12-14 16:49:02,085 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:02,085 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] [2021-12-14 16:49:02,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-14 16:49:02,085 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:02,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:02,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2106748736, now seen corresponding path program 17 times [2021-12-14 16:49:02,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:02,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386760717] [2021-12-14 16:49:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:02,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:02,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:02,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386760717] [2021-12-14 16:49:02,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386760717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:02,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:02,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:02,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212138975] [2021-12-14 16:49:02,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:02,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:02,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:02,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:02,173 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:02,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 145 transitions, 1015 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) [2021-12-14 16:49:02,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:02,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:02,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:02,406 INFO L129 PetriNetUnfolder]: 70/393 cut-off events. [2021-12-14 16:49:02,407 INFO L130 PetriNetUnfolder]: For 1417/1424 co-relation queries the response was YES. [2021-12-14 16:49:02,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1579 conditions, 393 events. 70/393 cut-off events. For 1417/1424 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1898 event pairs, 38 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1510. Up to 162 conditions per place. [2021-12-14 16:49:02,415 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 60 selfloop transitions, 14 changer transitions 34/169 dead transitions. [2021-12-14 16:49:02,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 169 transitions, 1423 flow [2021-12-14 16:49:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:49:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:49:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1212 transitions. [2021-12-14 16:49:02,431 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6601307189542484 [2021-12-14 16:49:02,434 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1212 transitions. [2021-12-14 16:49:02,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1212 transitions. [2021-12-14 16:49:02,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:02,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1212 transitions. [2021-12-14 16:49:02,439 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) [2021-12-14 16:49:02,444 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) [2021-12-14 16:49:02,444 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) [2021-12-14 16:49:02,444 INFO L186 Difference]: Start difference. First operand has 220 places, 145 transitions, 1015 flow. Second operand 18 states and 1212 transitions. [2021-12-14 16:49:02,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 169 transitions, 1423 flow [2021-12-14 16:49:02,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 169 transitions, 1311 flow, removed 36 selfloop flow, removed 15 redundant places. [2021-12-14 16:49:02,476 INFO L242 Difference]: Finished difference. Result has 216 places, 130 transitions, 807 flow [2021-12-14 16:49:02,476 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=807, PETRI_PLACES=216, PETRI_TRANSITIONS=130} [2021-12-14 16:49:02,477 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 125 predicate places. [2021-12-14 16:49:02,477 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 130 transitions, 807 flow [2021-12-14 16:49:02,477 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) [2021-12-14 16:49:02,478 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:02,478 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] [2021-12-14 16:49:02,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-14 16:49:02,478 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:02,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:02,478 INFO L85 PathProgramCache]: Analyzing trace with hash -651882364, now seen corresponding path program 18 times [2021-12-14 16:49:02,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:02,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184601964] [2021-12-14 16:49:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:02,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:02,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:02,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184601964] [2021-12-14 16:49:02,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184601964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:02,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:02,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:02,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385188144] [2021-12-14 16:49:02,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:02,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:02,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:02,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:02,603 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:02,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 130 transitions, 807 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) [2021-12-14 16:49:02,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:02,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:02,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:02,894 INFO L129 PetriNetUnfolder]: 67/376 cut-off events. [2021-12-14 16:49:02,895 INFO L130 PetriNetUnfolder]: For 1212/1219 co-relation queries the response was YES. [2021-12-14 16:49:02,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1449 conditions, 376 events. 67/376 cut-off events. For 1212/1219 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1742 event pairs, 40 based on Foata normal form. 1/371 useless extension candidates. Maximal degree in co-relation 1385. Up to 160 conditions per place. [2021-12-14 16:49:02,899 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 51 selfloop transitions, 12 changer transitions 33/157 dead transitions. [2021-12-14 16:49:02,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 157 transitions, 1199 flow [2021-12-14 16:49:02,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:49:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:49:02,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1214 transitions. [2021-12-14 16:49:02,901 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6612200435729847 [2021-12-14 16:49:02,901 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1214 transitions. [2021-12-14 16:49:02,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1214 transitions. [2021-12-14 16:49:02,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:02,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1214 transitions. [2021-12-14 16:49:02,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.44444444444444) internal successors, (1214), 18 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:02,905 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) [2021-12-14 16:49:02,905 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) [2021-12-14 16:49:02,905 INFO L186 Difference]: Start difference. First operand has 216 places, 130 transitions, 807 flow. Second operand 18 states and 1214 transitions. [2021-12-14 16:49:02,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 157 transitions, 1199 flow [2021-12-14 16:49:02,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 157 transitions, 1068 flow, removed 20 selfloop flow, removed 20 redundant places. [2021-12-14 16:49:02,914 INFO L242 Difference]: Finished difference. Result has 198 places, 122 transitions, 672 flow [2021-12-14 16:49:02,914 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=672, PETRI_PLACES=198, PETRI_TRANSITIONS=122} [2021-12-14 16:49:02,917 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 107 predicate places. [2021-12-14 16:49:02,917 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 122 transitions, 672 flow [2021-12-14 16:49:02,917 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) [2021-12-14 16:49:02,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:02,918 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] [2021-12-14 16:49:02,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-14 16:49:02,919 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:02,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:02,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1438871678, now seen corresponding path program 19 times [2021-12-14 16:49:02,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:02,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321577987] [2021-12-14 16:49:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:02,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:03,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:03,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321577987] [2021-12-14 16:49:03,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321577987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:03,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:03,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:03,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144580414] [2021-12-14 16:49:03,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:03,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:03,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:03,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:03,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:03,047 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:03,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 122 transitions, 672 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) [2021-12-14 16:49:03,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:03,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:03,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:03,340 INFO L129 PetriNetUnfolder]: 63/373 cut-off events. [2021-12-14 16:49:03,340 INFO L130 PetriNetUnfolder]: For 881/888 co-relation queries the response was YES. [2021-12-14 16:49:03,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1331 conditions, 373 events. 63/373 cut-off events. For 881/888 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1715 event pairs, 36 based on Foata normal form. 1/369 useless extension candidates. Maximal degree in co-relation 1273. Up to 160 conditions per place. [2021-12-14 16:49:03,343 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 49 selfloop transitions, 17 changer transitions 30/157 dead transitions. [2021-12-14 16:49:03,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 157 transitions, 1157 flow [2021-12-14 16:49:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:49:03,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-14 16:49:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1150 transitions. [2021-12-14 16:49:03,345 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6632064590542099 [2021-12-14 16:49:03,345 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1150 transitions. [2021-12-14 16:49:03,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1150 transitions. [2021-12-14 16:49:03,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:03,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1150 transitions. [2021-12-14 16:49:03,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.6470588235294) internal successors, (1150), 17 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:03,348 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) [2021-12-14 16:49:03,349 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) [2021-12-14 16:49:03,349 INFO L186 Difference]: Start difference. First operand has 198 places, 122 transitions, 672 flow. Second operand 17 states and 1150 transitions. [2021-12-14 16:49:03,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 157 transitions, 1157 flow [2021-12-14 16:49:03,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 157 transitions, 1042 flow, removed 32 selfloop flow, removed 17 redundant places. [2021-12-14 16:49:03,355 INFO L242 Difference]: Finished difference. Result has 189 places, 125 transitions, 714 flow [2021-12-14 16:49:03,356 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=714, PETRI_PLACES=189, PETRI_TRANSITIONS=125} [2021-12-14 16:49:03,356 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 98 predicate places. [2021-12-14 16:49:03,356 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 125 transitions, 714 flow [2021-12-14 16:49:03,357 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) [2021-12-14 16:49:03,357 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:03,357 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] [2021-12-14 16:49:03,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-14 16:49:03,357 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:03,357 INFO L85 PathProgramCache]: Analyzing trace with hash -458697492, now seen corresponding path program 20 times [2021-12-14 16:49:03,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:03,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176584984] [2021-12-14 16:49:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:03,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:03,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:03,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176584984] [2021-12-14 16:49:03,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176584984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:03,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:03,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:03,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674316882] [2021-12-14 16:49:03,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:03,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:03,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:03,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:03,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:03,445 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:03,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 125 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) [2021-12-14 16:49:03,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:03,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:03,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:03,669 INFO L129 PetriNetUnfolder]: 54/307 cut-off events. [2021-12-14 16:49:03,669 INFO L130 PetriNetUnfolder]: For 679/686 co-relation queries the response was YES. [2021-12-14 16:49:03,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1113 conditions, 307 events. 54/307 cut-off events. For 679/686 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1298 event pairs, 36 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 1058. Up to 138 conditions per place. [2021-12-14 16:49:03,672 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 38 selfloop transitions, 0 changer transitions 45/138 dead transitions. [2021-12-14 16:49:03,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 138 transitions, 934 flow [2021-12-14 16:49:03,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:49:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:49:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1202 transitions. [2021-12-14 16:49:03,675 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6546840958605664 [2021-12-14 16:49:03,675 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1202 transitions. [2021-12-14 16:49:03,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1202 transitions. [2021-12-14 16:49:03,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:03,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1202 transitions. [2021-12-14 16:49:03,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.77777777777777) internal successors, (1202), 18 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:03,678 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) [2021-12-14 16:49:03,678 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) [2021-12-14 16:49:03,678 INFO L186 Difference]: Start difference. First operand has 189 places, 125 transitions, 714 flow. Second operand 18 states and 1202 transitions. [2021-12-14 16:49:03,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 138 transitions, 934 flow [2021-12-14 16:49:03,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 138 transitions, 842 flow, removed 28 selfloop flow, removed 11 redundant places. [2021-12-14 16:49:03,699 INFO L242 Difference]: Finished difference. Result has 190 places, 93 transitions, 383 flow [2021-12-14 16:49:03,699 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=383, PETRI_PLACES=190, PETRI_TRANSITIONS=93} [2021-12-14 16:49:03,700 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 99 predicate places. [2021-12-14 16:49:03,700 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 93 transitions, 383 flow [2021-12-14 16:49:03,700 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) [2021-12-14 16:49:03,700 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:03,700 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] [2021-12-14 16:49:03,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-14 16:49:03,701 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:03,701 INFO L85 PathProgramCache]: Analyzing trace with hash -269060366, now seen corresponding path program 4 times [2021-12-14 16:49:03,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:03,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947146459] [2021-12-14 16:49:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:03,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:03,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:03,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947146459] [2021-12-14 16:49:03,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947146459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:03,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:03,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:03,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156038463] [2021-12-14 16:49:03,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:03,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:03,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:03,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:03,789 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:03,790 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 93 transitions, 383 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) [2021-12-14 16:49:03,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:03,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:03,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:04,046 INFO L129 PetriNetUnfolder]: 56/288 cut-off events. [2021-12-14 16:49:04,046 INFO L130 PetriNetUnfolder]: For 601/605 co-relation queries the response was YES. [2021-12-14 16:49:04,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 288 events. 56/288 cut-off events. For 601/605 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1161 event pairs, 14 based on Foata normal form. 1/284 useless extension candidates. Maximal degree in co-relation 907. Up to 57 conditions per place. [2021-12-14 16:49:04,051 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 51 selfloop transitions, 14 changer transitions 28/148 dead transitions. [2021-12-14 16:49:04,051 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 148 transitions, 947 flow [2021-12-14 16:49:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:49:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-14 16:49:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1345 transitions. [2021-12-14 16:49:04,053 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6593137254901961 [2021-12-14 16:49:04,053 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1345 transitions. [2021-12-14 16:49:04,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1345 transitions. [2021-12-14 16:49:04,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:04,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1345 transitions. [2021-12-14 16:49:04,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.25) internal successors, (1345), 20 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:04,057 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) [2021-12-14 16:49:04,058 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) [2021-12-14 16:49:04,058 INFO L186 Difference]: Start difference. First operand has 190 places, 93 transitions, 383 flow. Second operand 20 states and 1345 transitions. [2021-12-14 16:49:04,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 148 transitions, 947 flow [2021-12-14 16:49:04,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 148 transitions, 920 flow, removed 8 selfloop flow, removed 9 redundant places. [2021-12-14 16:49:04,062 INFO L242 Difference]: Finished difference. Result has 170 places, 103 transitions, 544 flow [2021-12-14 16:49:04,062 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=544, PETRI_PLACES=170, PETRI_TRANSITIONS=103} [2021-12-14 16:49:04,062 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 79 predicate places. [2021-12-14 16:49:04,063 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 103 transitions, 544 flow [2021-12-14 16:49:04,063 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) [2021-12-14 16:49:04,063 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:04,063 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] [2021-12-14 16:49:04,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-14 16:49:04,064 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:04,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash -502436508, now seen corresponding path program 5 times [2021-12-14 16:49:04,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:04,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358634200] [2021-12-14 16:49:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:04,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:04,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:04,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358634200] [2021-12-14 16:49:04,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358634200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:04,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:04,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:04,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660479541] [2021-12-14 16:49:04,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:04,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:04,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:04,152 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:04,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 103 transitions, 544 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) [2021-12-14 16:49:04,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:04,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:04,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:04,361 INFO L129 PetriNetUnfolder]: 57/292 cut-off events. [2021-12-14 16:49:04,362 INFO L130 PetriNetUnfolder]: For 1574/1576 co-relation queries the response was YES. [2021-12-14 16:49:04,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1282 conditions, 292 events. 57/292 cut-off events. For 1574/1576 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1244 event pairs, 15 based on Foata normal form. 1/290 useless extension candidates. Maximal degree in co-relation 1223. Up to 70 conditions per place. [2021-12-14 16:49:04,365 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 49 selfloop transitions, 23 changer transitions 20/147 dead transitions. [2021-12-14 16:49:04,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 147 transitions, 1183 flow [2021-12-14 16:49:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:49:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-14 16:49:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1078 transitions. [2021-12-14 16:49:04,367 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6605392156862745 [2021-12-14 16:49:04,367 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1078 transitions. [2021-12-14 16:49:04,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1078 transitions. [2021-12-14 16:49:04,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:04,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1078 transitions. [2021-12-14 16:49:04,370 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) [2021-12-14 16:49:04,371 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) [2021-12-14 16:49:04,372 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) [2021-12-14 16:49:04,372 INFO L186 Difference]: Start difference. First operand has 170 places, 103 transitions, 544 flow. Second operand 16 states and 1078 transitions. [2021-12-14 16:49:04,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 147 transitions, 1183 flow [2021-12-14 16:49:04,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 147 transitions, 1044 flow, removed 62 selfloop flow, removed 9 redundant places. [2021-12-14 16:49:04,379 INFO L242 Difference]: Finished difference. Result has 175 places, 113 transitions, 672 flow [2021-12-14 16:49:04,380 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=672, PETRI_PLACES=175, PETRI_TRANSITIONS=113} [2021-12-14 16:49:04,380 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 84 predicate places. [2021-12-14 16:49:04,380 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 113 transitions, 672 flow [2021-12-14 16:49:04,381 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) [2021-12-14 16:49:04,381 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:04,382 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] [2021-12-14 16:49:04,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-14 16:49:04,383 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1767224684, now seen corresponding path program 6 times [2021-12-14 16:49:04,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:04,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607559874] [2021-12-14 16:49:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:04,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:04,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:04,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607559874] [2021-12-14 16:49:04,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607559874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:04,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:04,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:04,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288158194] [2021-12-14 16:49:04,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:04,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:04,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:04,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:04,506 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:04,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 113 transitions, 672 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) [2021-12-14 16:49:04,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:04,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:04,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:04,786 INFO L129 PetriNetUnfolder]: 65/331 cut-off events. [2021-12-14 16:49:04,786 INFO L130 PetriNetUnfolder]: For 1592/1608 co-relation queries the response was YES. [2021-12-14 16:49:04,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 331 events. 65/331 cut-off events. For 1592/1608 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1554 event pairs, 14 based on Foata normal form. 4/332 useless extension candidates. Maximal degree in co-relation 1360. Up to 72 conditions per place. [2021-12-14 16:49:04,789 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 60 selfloop transitions, 23 changer transitions 29/167 dead transitions. [2021-12-14 16:49:04,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 167 transitions, 1438 flow [2021-12-14 16:49:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 16:49:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-14 16:49:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1411 transitions. [2021-12-14 16:49:04,790 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2021-12-14 16:49:04,791 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1411 transitions. [2021-12-14 16:49:04,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1411 transitions. [2021-12-14 16:49:04,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:04,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1411 transitions. [2021-12-14 16:49:04,792 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) [2021-12-14 16:49:04,794 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) [2021-12-14 16:49:04,794 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) [2021-12-14 16:49:04,794 INFO L186 Difference]: Start difference. First operand has 175 places, 113 transitions, 672 flow. Second operand 21 states and 1411 transitions. [2021-12-14 16:49:04,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 167 transitions, 1438 flow [2021-12-14 16:49:04,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 167 transitions, 1287 flow, removed 51 selfloop flow, removed 9 redundant places. [2021-12-14 16:49:04,801 INFO L242 Difference]: Finished difference. Result has 195 places, 123 transitions, 801 flow [2021-12-14 16:49:04,801 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=801, PETRI_PLACES=195, PETRI_TRANSITIONS=123} [2021-12-14 16:49:04,801 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 104 predicate places. [2021-12-14 16:49:04,801 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 123 transitions, 801 flow [2021-12-14 16:49:04,802 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) [2021-12-14 16:49:04,802 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:04,802 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] [2021-12-14 16:49:04,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-14 16:49:04,802 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:04,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:04,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1841641200, now seen corresponding path program 7 times [2021-12-14 16:49:04,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:04,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867338866] [2021-12-14 16:49:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:04,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:04,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:04,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867338866] [2021-12-14 16:49:04,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867338866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:04,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:04,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:04,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455768482] [2021-12-14 16:49:04,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:04,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:04,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:04,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:04,875 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:04,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 123 transitions, 801 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) [2021-12-14 16:49:04,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:04,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:04,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:05,092 INFO L129 PetriNetUnfolder]: 61/321 cut-off events. [2021-12-14 16:49:05,092 INFO L130 PetriNetUnfolder]: For 1900/1922 co-relation queries the response was YES. [2021-12-14 16:49:05,094 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 321 events. 61/321 cut-off events. For 1900/1922 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1493 event pairs, 10 based on Foata normal form. 7/325 useless extension candidates. Maximal degree in co-relation 1387. Up to 68 conditions per place. [2021-12-14 16:49:05,095 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 58 selfloop transitions, 26 changer transitions 34/173 dead transitions. [2021-12-14 16:49:05,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 173 transitions, 1544 flow [2021-12-14 16:49:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 16:49:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-14 16:49:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1472 transitions. [2021-12-14 16:49:05,097 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6559714795008913 [2021-12-14 16:49:05,097 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1472 transitions. [2021-12-14 16:49:05,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1472 transitions. [2021-12-14 16:49:05,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:05,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1472 transitions. [2021-12-14 16:49:05,099 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) [2021-12-14 16:49:05,100 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) [2021-12-14 16:49:05,101 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) [2021-12-14 16:49:05,101 INFO L186 Difference]: Start difference. First operand has 195 places, 123 transitions, 801 flow. Second operand 22 states and 1472 transitions. [2021-12-14 16:49:05,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 173 transitions, 1544 flow [2021-12-14 16:49:05,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 173 transitions, 1395 flow, removed 59 selfloop flow, removed 14 redundant places. [2021-12-14 16:49:05,109 INFO L242 Difference]: Finished difference. Result has 203 places, 123 transitions, 834 flow [2021-12-14 16:49:05,109 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=834, PETRI_PLACES=203, PETRI_TRANSITIONS=123} [2021-12-14 16:49:05,109 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 112 predicate places. [2021-12-14 16:49:05,109 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 123 transitions, 834 flow [2021-12-14 16:49:05,110 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) [2021-12-14 16:49:05,110 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:05,110 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] [2021-12-14 16:49:05,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-14 16:49:05,110 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash -699870336, now seen corresponding path program 8 times [2021-12-14 16:49:05,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:05,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307811455] [2021-12-14 16:49:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:05,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:05,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:05,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307811455] [2021-12-14 16:49:05,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307811455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:05,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:05,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:05,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251494729] [2021-12-14 16:49:05,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:05,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:05,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:05,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:05,179 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:05,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 123 transitions, 834 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) [2021-12-14 16:49:05,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:05,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:05,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:05,379 INFO L129 PetriNetUnfolder]: 48/272 cut-off events. [2021-12-14 16:49:05,379 INFO L130 PetriNetUnfolder]: For 1517/1537 co-relation queries the response was YES. [2021-12-14 16:49:05,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1234 conditions, 272 events. 48/272 cut-off events. For 1517/1537 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1096 event pairs, 9 based on Foata normal form. 7/277 useless extension candidates. Maximal degree in co-relation 1161. Up to 66 conditions per place. [2021-12-14 16:49:05,383 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 49 selfloop transitions, 14 changer transitions 31/149 dead transitions. [2021-12-14 16:49:05,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 149 transitions, 1260 flow [2021-12-14 16:49:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:49:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:49:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1203 transitions. [2021-12-14 16:49:05,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6552287581699346 [2021-12-14 16:49:05,384 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1203 transitions. [2021-12-14 16:49:05,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1203 transitions. [2021-12-14 16:49:05,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:05,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1203 transitions. [2021-12-14 16:49:05,386 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) [2021-12-14 16:49:05,389 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) [2021-12-14 16:49:05,397 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) [2021-12-14 16:49:05,397 INFO L186 Difference]: Start difference. First operand has 203 places, 123 transitions, 834 flow. Second operand 18 states and 1203 transitions. [2021-12-14 16:49:05,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 149 transitions, 1260 flow [2021-12-14 16:49:05,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 149 transitions, 1131 flow, removed 47 selfloop flow, removed 16 redundant places. [2021-12-14 16:49:05,408 INFO L242 Difference]: Finished difference. Result has 197 places, 108 transitions, 624 flow [2021-12-14 16:49:05,408 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=624, PETRI_PLACES=197, PETRI_TRANSITIONS=108} [2021-12-14 16:49:05,408 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 106 predicate places. [2021-12-14 16:49:05,409 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 108 transitions, 624 flow [2021-12-14 16:49:05,409 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) [2021-12-14 16:49:05,423 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:05,423 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] [2021-12-14 16:49:05,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-14 16:49:05,424 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:05,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1093058920, now seen corresponding path program 9 times [2021-12-14 16:49:05,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:05,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675452905] [2021-12-14 16:49:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:05,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:05,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:05,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675452905] [2021-12-14 16:49:05,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675452905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:05,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:05,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:05,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119501044] [2021-12-14 16:49:05,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:05,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:05,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:05,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:05,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:05,512 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:05,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 108 transitions, 624 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) [2021-12-14 16:49:05,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:05,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:05,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:05,723 INFO L129 PetriNetUnfolder]: 50/273 cut-off events. [2021-12-14 16:49:05,724 INFO L130 PetriNetUnfolder]: For 1368/1382 co-relation queries the response was YES. [2021-12-14 16:49:05,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1226 conditions, 273 events. 50/273 cut-off events. For 1368/1382 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1086 event pairs, 13 based on Foata normal form. 3/273 useless extension candidates. Maximal degree in co-relation 1160. Up to 66 conditions per place. [2021-12-14 16:49:05,728 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 46 selfloop transitions, 22 changer transitions 21/144 dead transitions. [2021-12-14 16:49:05,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 144 transitions, 1213 flow [2021-12-14 16:49:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:49:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:49:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1209 transitions. [2021-12-14 16:49:05,730 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6584967320261438 [2021-12-14 16:49:05,730 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1209 transitions. [2021-12-14 16:49:05,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1209 transitions. [2021-12-14 16:49:05,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:05,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1209 transitions. [2021-12-14 16:49:05,732 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) [2021-12-14 16:49:05,733 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) [2021-12-14 16:49:05,733 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) [2021-12-14 16:49:05,733 INFO L186 Difference]: Start difference. First operand has 197 places, 108 transitions, 624 flow. Second operand 18 states and 1209 transitions. [2021-12-14 16:49:05,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 144 transitions, 1213 flow [2021-12-14 16:49:05,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 144 transitions, 1044 flow, removed 38 selfloop flow, removed 19 redundant places. [2021-12-14 16:49:05,741 INFO L242 Difference]: Finished difference. Result has 181 places, 117 transitions, 727 flow [2021-12-14 16:49:05,741 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=727, PETRI_PLACES=181, PETRI_TRANSITIONS=117} [2021-12-14 16:49:05,741 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 90 predicate places. [2021-12-14 16:49:05,741 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 117 transitions, 727 flow [2021-12-14 16:49:05,742 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) [2021-12-14 16:49:05,742 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:05,742 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] [2021-12-14 16:49:05,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-14 16:49:05,742 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:05,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:05,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1172302702, now seen corresponding path program 10 times [2021-12-14 16:49:05,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:05,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703515379] [2021-12-14 16:49:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:05,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:05,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:05,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703515379] [2021-12-14 16:49:05,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703515379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:05,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:05,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:05,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973949369] [2021-12-14 16:49:05,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:05,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:05,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:05,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:05,837 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:05,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 117 transitions, 727 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) [2021-12-14 16:49:05,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:05,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:05,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:06,059 INFO L129 PetriNetUnfolder]: 47/272 cut-off events. [2021-12-14 16:49:06,059 INFO L130 PetriNetUnfolder]: For 980/986 co-relation queries the response was YES. [2021-12-14 16:49:06,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 272 events. 47/272 cut-off events. For 980/986 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1114 event pairs, 16 based on Foata normal form. 1/269 useless extension candidates. Maximal degree in co-relation 1075. Up to 66 conditions per place. [2021-12-14 16:49:06,062 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 47 selfloop transitions, 24 changer transitions 22/148 dead transitions. [2021-12-14 16:49:06,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 148 transitions, 1238 flow [2021-12-14 16:49:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:49:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-14 16:49:06,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1145 transitions. [2021-12-14 16:49:06,064 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.660322952710496 [2021-12-14 16:49:06,064 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1145 transitions. [2021-12-14 16:49:06,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1145 transitions. [2021-12-14 16:49:06,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:06,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1145 transitions. [2021-12-14 16:49:06,066 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) [2021-12-14 16:49:06,067 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) [2021-12-14 16:49:06,067 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) [2021-12-14 16:49:06,067 INFO L186 Difference]: Start difference. First operand has 181 places, 117 transitions, 727 flow. Second operand 17 states and 1145 transitions. [2021-12-14 16:49:06,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 148 transitions, 1238 flow [2021-12-14 16:49:06,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 148 transitions, 1169 flow, removed 29 selfloop flow, removed 5 redundant places. [2021-12-14 16:49:06,075 INFO L242 Difference]: Finished difference. Result has 193 places, 121 transitions, 820 flow [2021-12-14 16:49:06,075 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=820, PETRI_PLACES=193, PETRI_TRANSITIONS=121} [2021-12-14 16:49:06,076 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 102 predicate places. [2021-12-14 16:49:06,076 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 121 transitions, 820 flow [2021-12-14 16:49:06,076 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) [2021-12-14 16:49:06,076 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:06,076 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] [2021-12-14 16:49:06,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-14 16:49:06,077 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1206667032, now seen corresponding path program 11 times [2021-12-14 16:49:06,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:06,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385258150] [2021-12-14 16:49:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:06,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:06,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:06,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385258150] [2021-12-14 16:49:06,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385258150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:06,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:06,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:06,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858593692] [2021-12-14 16:49:06,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:06,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:06,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:06,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:06,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:06,166 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:06,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 121 transitions, 820 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) [2021-12-14 16:49:06,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:06,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:06,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:06,401 INFO L129 PetriNetUnfolder]: 44/260 cut-off events. [2021-12-14 16:49:06,402 INFO L130 PetriNetUnfolder]: For 1052/1066 co-relation queries the response was YES. [2021-12-14 16:49:06,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1111 conditions, 260 events. 44/260 cut-off events. For 1052/1066 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1032 event pairs, 12 based on Foata normal form. 3/260 useless extension candidates. Maximal degree in co-relation 1044. Up to 66 conditions per place. [2021-12-14 16:49:06,404 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 46 selfloop transitions, 15 changer transitions 29/145 dead transitions. [2021-12-14 16:49:06,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 145 transitions, 1218 flow [2021-12-14 16:49:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:49:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:49:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1208 transitions. [2021-12-14 16:49:06,407 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6579520697167756 [2021-12-14 16:49:06,407 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1208 transitions. [2021-12-14 16:49:06,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1208 transitions. [2021-12-14 16:49:06,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:06,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1208 transitions. [2021-12-14 16:49:06,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.11111111111111) internal successors, (1208), 18 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:06,410 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) [2021-12-14 16:49:06,410 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) [2021-12-14 16:49:06,410 INFO L186 Difference]: Start difference. First operand has 193 places, 121 transitions, 820 flow. Second operand 18 states and 1208 transitions. [2021-12-14 16:49:06,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 145 transitions, 1218 flow [2021-12-14 16:49:06,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 145 transitions, 1127 flow, removed 24 selfloop flow, removed 8 redundant places. [2021-12-14 16:49:06,418 INFO L242 Difference]: Finished difference. Result has 202 places, 112 transitions, 687 flow [2021-12-14 16:49:06,418 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=687, PETRI_PLACES=202, PETRI_TRANSITIONS=112} [2021-12-14 16:49:06,419 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 111 predicate places. [2021-12-14 16:49:06,419 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 112 transitions, 687 flow [2021-12-14 16:49:06,419 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) [2021-12-14 16:49:06,419 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:06,419 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] [2021-12-14 16:49:06,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-14 16:49:06,420 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:06,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:06,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1678314102, now seen corresponding path program 12 times [2021-12-14 16:49:06,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:06,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146100673] [2021-12-14 16:49:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:06,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:06,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:06,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146100673] [2021-12-14 16:49:06,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146100673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:06,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:06,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:06,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502801805] [2021-12-14 16:49:06,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:06,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:06,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:06,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:06,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:06,509 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:06,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 112 transitions, 687 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) [2021-12-14 16:49:06,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:06,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:06,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:06,691 INFO L129 PetriNetUnfolder]: 34/228 cut-off events. [2021-12-14 16:49:06,691 INFO L130 PetriNetUnfolder]: For 909/915 co-relation queries the response was YES. [2021-12-14 16:49:06,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 228 events. 34/228 cut-off events. For 909/915 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 803 event pairs, 11 based on Foata normal form. 1/227 useless extension candidates. Maximal degree in co-relation 852. Up to 53 conditions per place. [2021-12-14 16:49:06,693 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 37 selfloop transitions, 3 changer transitions 34/129 dead transitions. [2021-12-14 16:49:06,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 129 transitions, 959 flow [2021-12-14 16:49:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:49:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-14 16:49:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1136 transitions. [2021-12-14 16:49:06,695 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6551326412918108 [2021-12-14 16:49:06,695 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1136 transitions. [2021-12-14 16:49:06,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1136 transitions. [2021-12-14 16:49:06,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:06,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1136 transitions. [2021-12-14 16:49:06,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.82352941176471) internal successors, (1136), 17 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:06,697 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) [2021-12-14 16:49:06,697 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) [2021-12-14 16:49:06,698 INFO L186 Difference]: Start difference. First operand has 202 places, 112 transitions, 687 flow. Second operand 17 states and 1136 transitions. [2021-12-14 16:49:06,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 129 transitions, 959 flow [2021-12-14 16:49:06,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 129 transitions, 851 flow, removed 26 selfloop flow, removed 20 redundant places. [2021-12-14 16:49:06,704 INFO L242 Difference]: Finished difference. Result has 186 places, 92 transitions, 393 flow [2021-12-14 16:49:06,704 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=393, PETRI_PLACES=186, PETRI_TRANSITIONS=92} [2021-12-14 16:49:06,704 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 95 predicate places. [2021-12-14 16:49:06,704 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 92 transitions, 393 flow [2021-12-14 16:49:06,705 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) [2021-12-14 16:49:06,705 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:06,705 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] [2021-12-14 16:49:06,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-14 16:49:06,705 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:06,706 INFO L85 PathProgramCache]: Analyzing trace with hash 873749492, now seen corresponding path program 13 times [2021-12-14 16:49:06,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:06,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906152172] [2021-12-14 16:49:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:06,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:06,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:06,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906152172] [2021-12-14 16:49:06,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906152172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:06,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:06,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:06,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676502635] [2021-12-14 16:49:06,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:06,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:06,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:06,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:06,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:06,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:06,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 92 transitions, 393 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) [2021-12-14 16:49:06,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:06,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:06,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:07,021 INFO L129 PetriNetUnfolder]: 39/241 cut-off events. [2021-12-14 16:49:07,021 INFO L130 PetriNetUnfolder]: For 786/787 co-relation queries the response was YES. [2021-12-14 16:49:07,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 241 events. 39/241 cut-off events. For 786/787 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 858 event pairs, 5 based on Foata normal form. 1/242 useless extension candidates. Maximal degree in co-relation 834. Up to 33 conditions per place. [2021-12-14 16:49:07,024 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 43 selfloop transitions, 19 changer transitions 28/145 dead transitions. [2021-12-14 16:49:07,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 145 transitions, 1058 flow [2021-12-14 16:49:07,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 16:49:07,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-14 16:49:07,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1469 transitions. [2021-12-14 16:49:07,025 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6546345811051694 [2021-12-14 16:49:07,026 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1469 transitions. [2021-12-14 16:49:07,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1469 transitions. [2021-12-14 16:49:07,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:07,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1469 transitions. [2021-12-14 16:49:07,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.77272727272727) internal successors, (1469), 22 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:07,029 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) [2021-12-14 16:49:07,029 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) [2021-12-14 16:49:07,029 INFO L186 Difference]: Start difference. First operand has 186 places, 92 transitions, 393 flow. Second operand 22 states and 1469 transitions. [2021-12-14 16:49:07,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 145 transitions, 1058 flow [2021-12-14 16:49:07,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 145 transitions, 843 flow, removed 35 selfloop flow, removed 24 redundant places. [2021-12-14 16:49:07,034 INFO L242 Difference]: Finished difference. Result has 168 places, 103 transitions, 486 flow [2021-12-14 16:49:07,034 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=486, PETRI_PLACES=168, PETRI_TRANSITIONS=103} [2021-12-14 16:49:07,034 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 77 predicate places. [2021-12-14 16:49:07,035 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 103 transitions, 486 flow [2021-12-14 16:49:07,035 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) [2021-12-14 16:49:07,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:07,035 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] [2021-12-14 16:49:07,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-14 16:49:07,035 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:07,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:07,036 INFO L85 PathProgramCache]: Analyzing trace with hash -210010526, now seen corresponding path program 14 times [2021-12-14 16:49:07,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:07,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951043140] [2021-12-14 16:49:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:07,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:07,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:07,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951043140] [2021-12-14 16:49:07,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951043140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:07,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:07,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:07,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664348686] [2021-12-14 16:49:07,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:07,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:07,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:07,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:07,114 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:07,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 103 transitions, 486 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) [2021-12-14 16:49:07,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:07,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:07,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:07,340 INFO L129 PetriNetUnfolder]: 36/227 cut-off events. [2021-12-14 16:49:07,341 INFO L130 PetriNetUnfolder]: For 580/581 co-relation queries the response was YES. [2021-12-14 16:49:07,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 227 events. 36/227 cut-off events. For 580/581 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 772 event pairs, 6 based on Foata normal form. 1/226 useless extension candidates. Maximal degree in co-relation 809. Up to 31 conditions per place. [2021-12-14 16:49:07,344 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 39 selfloop transitions, 21 changer transitions 28/143 dead transitions. [2021-12-14 16:49:07,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 143 transitions, 1030 flow [2021-12-14 16:49:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 16:49:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-14 16:49:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1402 transitions. [2021-12-14 16:49:07,346 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6545284780578898 [2021-12-14 16:49:07,346 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1402 transitions. [2021-12-14 16:49:07,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1402 transitions. [2021-12-14 16:49:07,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:07,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1402 transitions. [2021-12-14 16:49:07,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 66.76190476190476) internal successors, (1402), 21 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:07,350 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) [2021-12-14 16:49:07,351 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) [2021-12-14 16:49:07,351 INFO L186 Difference]: Start difference. First operand has 168 places, 103 transitions, 486 flow. Second operand 21 states and 1402 transitions. [2021-12-14 16:49:07,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 143 transitions, 1030 flow [2021-12-14 16:49:07,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 143 transitions, 936 flow, removed 41 selfloop flow, removed 11 redundant places. [2021-12-14 16:49:07,357 INFO L242 Difference]: Finished difference. Result has 177 places, 105 transitions, 571 flow [2021-12-14 16:49:07,357 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=571, PETRI_PLACES=177, PETRI_TRANSITIONS=105} [2021-12-14 16:49:07,358 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 86 predicate places. [2021-12-14 16:49:07,358 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 105 transitions, 571 flow [2021-12-14 16:49:07,359 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) [2021-12-14 16:49:07,359 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:07,359 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] [2021-12-14 16:49:07,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-14 16:49:07,360 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1932521730, now seen corresponding path program 15 times [2021-12-14 16:49:07,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:07,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891892516] [2021-12-14 16:49:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:07,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:07,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:07,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891892516] [2021-12-14 16:49:07,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891892516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:07,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:07,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:07,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63386991] [2021-12-14 16:49:07,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:07,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:07,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:07,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:07,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:07,441 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:07,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 105 transitions, 571 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) [2021-12-14 16:49:07,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:07,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:07,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:07,615 INFO L129 PetriNetUnfolder]: 33/222 cut-off events. [2021-12-14 16:49:07,615 INFO L130 PetriNetUnfolder]: For 934/935 co-relation queries the response was YES. [2021-12-14 16:49:07,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 222 events. 33/222 cut-off events. For 934/935 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 752 event pairs, 3 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 868. Up to 36 conditions per place. [2021-12-14 16:49:07,617 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 39 selfloop transitions, 22 changer transitions 25/141 dead transitions. [2021-12-14 16:49:07,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 141 transitions, 1083 flow [2021-12-14 16:49:07,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:49:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-14 16:49:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1079 transitions. [2021-12-14 16:49:07,618 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6611519607843137 [2021-12-14 16:49:07,618 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1079 transitions. [2021-12-14 16:49:07,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1079 transitions. [2021-12-14 16:49:07,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:07,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1079 transitions. [2021-12-14 16:49:07,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.4375) internal successors, (1079), 16 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:07,621 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) [2021-12-14 16:49:07,621 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) [2021-12-14 16:49:07,621 INFO L186 Difference]: Start difference. First operand has 177 places, 105 transitions, 571 flow. Second operand 16 states and 1079 transitions. [2021-12-14 16:49:07,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 141 transitions, 1083 flow [2021-12-14 16:49:07,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 141 transitions, 936 flow, removed 48 selfloop flow, removed 17 redundant places. [2021-12-14 16:49:07,626 INFO L242 Difference]: Finished difference. Result has 171 places, 110 transitions, 620 flow [2021-12-14 16:49:07,626 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=620, PETRI_PLACES=171, PETRI_TRANSITIONS=110} [2021-12-14 16:49:07,626 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 80 predicate places. [2021-12-14 16:49:07,626 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 110 transitions, 620 flow [2021-12-14 16:49:07,627 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) [2021-12-14 16:49:07,627 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:07,627 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] [2021-12-14 16:49:07,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-14 16:49:07,627 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1628151802, now seen corresponding path program 16 times [2021-12-14 16:49:07,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:07,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628108896] [2021-12-14 16:49:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:07,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:07,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:07,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628108896] [2021-12-14 16:49:07,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628108896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:07,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:07,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:07,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023208170] [2021-12-14 16:49:07,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:07,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:07,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:07,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:07,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:07,701 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:07,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 110 transitions, 620 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) [2021-12-14 16:49:07,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:07,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:07,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:07,876 INFO L129 PetriNetUnfolder]: 24/192 cut-off events. [2021-12-14 16:49:07,877 INFO L130 PetriNetUnfolder]: For 544/545 co-relation queries the response was YES. [2021-12-14 16:49:07,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 192 events. 24/192 cut-off events. For 544/545 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 544 event pairs, 3 based on Foata normal form. 1/192 useless extension candidates. Maximal degree in co-relation 694. Up to 30 conditions per place. [2021-12-14 16:49:07,878 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 35 selfloop transitions, 10 changer transitions 30/130 dead transitions. [2021-12-14 16:49:07,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 130 transitions, 911 flow [2021-12-14 16:49:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:49:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:49:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1201 transitions. [2021-12-14 16:49:07,880 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6541394335511983 [2021-12-14 16:49:07,880 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1201 transitions. [2021-12-14 16:49:07,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1201 transitions. [2021-12-14 16:49:07,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:07,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1201 transitions. [2021-12-14 16:49:07,882 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) [2021-12-14 16:49:07,883 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) [2021-12-14 16:49:07,883 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) [2021-12-14 16:49:07,883 INFO L186 Difference]: Start difference. First operand has 171 places, 110 transitions, 620 flow. Second operand 18 states and 1201 transitions. [2021-12-14 16:49:07,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 130 transitions, 911 flow [2021-12-14 16:49:07,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 130 transitions, 813 flow, removed 27 selfloop flow, removed 9 redundant places. [2021-12-14 16:49:07,888 INFO L242 Difference]: Finished difference. Result has 179 places, 95 transitions, 426 flow [2021-12-14 16:49:07,888 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=538, 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} [2021-12-14 16:49:07,888 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 88 predicate places. [2021-12-14 16:49:07,888 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 95 transitions, 426 flow [2021-12-14 16:49:07,889 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) [2021-12-14 16:49:07,889 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:07,889 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] [2021-12-14 16:49:07,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-14 16:49:07,889 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:07,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1233211024, now seen corresponding path program 17 times [2021-12-14 16:49:07,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:07,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507093542] [2021-12-14 16:49:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:07,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:07,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:07,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507093542] [2021-12-14 16:49:07,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507093542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:07,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:07,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:07,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789317160] [2021-12-14 16:49:07,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:07,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:07,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:07,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:07,983 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:07,984 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) [2021-12-14 16:49:07,984 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:07,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:07,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:08,198 INFO L129 PetriNetUnfolder]: 29/203 cut-off events. [2021-12-14 16:49:08,199 INFO L130 PetriNetUnfolder]: For 622/623 co-relation queries the response was YES. [2021-12-14 16:49:08,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 203 events. 29/203 cut-off events. For 622/623 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 612 event pairs, 4 based on Foata normal form. 1/202 useless extension candidates. Maximal degree in co-relation 725. Up to 30 conditions per place. [2021-12-14 16:49:08,200 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 33 selfloop transitions, 20 changer transitions 23/131 dead transitions. [2021-12-14 16:49:08,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 131 transitions, 912 flow [2021-12-14 16:49:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:49:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:49:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1206 transitions. [2021-12-14 16:49:08,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2021-12-14 16:49:08,202 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1206 transitions. [2021-12-14 16:49:08,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1206 transitions. [2021-12-14 16:49:08,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:08,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1206 transitions. [2021-12-14 16:49:08,203 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) [2021-12-14 16:49:08,204 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) [2021-12-14 16:49:08,205 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) [2021-12-14 16:49:08,205 INFO L186 Difference]: Start difference. First operand has 179 places, 95 transitions, 426 flow. Second operand 18 states and 1206 transitions. [2021-12-14 16:49:08,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 131 transitions, 912 flow [2021-12-14 16:49:08,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 131 transitions, 766 flow, removed 25 selfloop flow, removed 18 redundant places. [2021-12-14 16:49:08,208 INFO L242 Difference]: Finished difference. Result has 164 places, 104 transitions, 537 flow [2021-12-14 16:49:08,208 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=138, 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=537, PETRI_PLACES=164, PETRI_TRANSITIONS=104} [2021-12-14 16:49:08,209 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 73 predicate places. [2021-12-14 16:49:08,209 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 104 transitions, 537 flow [2021-12-14 16:49:08,209 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) [2021-12-14 16:49:08,209 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:08,209 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] [2021-12-14 16:49:08,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-14 16:49:08,209 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:08,210 INFO L85 PathProgramCache]: Analyzing trace with hash -693063326, now seen corresponding path program 18 times [2021-12-14 16:49:08,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:08,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896143584] [2021-12-14 16:49:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:08,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:08,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:08,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896143584] [2021-12-14 16:49:08,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896143584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:08,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:08,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:08,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290114616] [2021-12-14 16:49:08,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:08,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:08,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:08,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:08,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:08,293 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:08,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 104 transitions, 537 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) [2021-12-14 16:49:08,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:08,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:08,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:08,467 INFO L129 PetriNetUnfolder]: 25/199 cut-off events. [2021-12-14 16:49:08,467 INFO L130 PetriNetUnfolder]: For 440/441 co-relation queries the response was YES. [2021-12-14 16:49:08,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 199 events. 25/199 cut-off events. For 440/441 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 586 event pairs, 0 based on Foata normal form. 1/200 useless extension candidates. Maximal degree in co-relation 680. Up to 30 conditions per place. [2021-12-14 16:49:08,469 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 34 selfloop transitions, 22 changer transitions 24/135 dead transitions. [2021-12-14 16:49:08,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 135 transitions, 959 flow [2021-12-14 16:49:08,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:49:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-14 16:49:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1142 transitions. [2021-12-14 16:49:08,470 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6585928489042676 [2021-12-14 16:49:08,470 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1142 transitions. [2021-12-14 16:49:08,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1142 transitions. [2021-12-14 16:49:08,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:08,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1142 transitions. [2021-12-14 16:49:08,472 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) [2021-12-14 16:49:08,473 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) [2021-12-14 16:49:08,473 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) [2021-12-14 16:49:08,473 INFO L186 Difference]: Start difference. First operand has 164 places, 104 transitions, 537 flow. Second operand 17 states and 1142 transitions. [2021-12-14 16:49:08,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 135 transitions, 959 flow [2021-12-14 16:49:08,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 135 transitions, 880 flow, removed 35 selfloop flow, removed 5 redundant places. [2021-12-14 16:49:08,477 INFO L242 Difference]: Finished difference. Result has 176 places, 108 transitions, 619 flow [2021-12-14 16:49:08,478 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=489, 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=619, PETRI_PLACES=176, PETRI_TRANSITIONS=108} [2021-12-14 16:49:08,478 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 85 predicate places. [2021-12-14 16:49:08,478 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 108 transitions, 619 flow [2021-12-14 16:49:08,478 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) [2021-12-14 16:49:08,478 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:08,479 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] [2021-12-14 16:49:08,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-14 16:49:08,479 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:08,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:08,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1022511152, now seen corresponding path program 19 times [2021-12-14 16:49:08,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:08,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316749699] [2021-12-14 16:49:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:08,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:08,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:08,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316749699] [2021-12-14 16:49:08,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316749699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:08,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:08,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:08,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529179169] [2021-12-14 16:49:08,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:08,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:08,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:08,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:08,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:08,561 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:08,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 108 transitions, 619 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) [2021-12-14 16:49:08,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:08,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:08,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:08,721 INFO L129 PetriNetUnfolder]: 19/186 cut-off events. [2021-12-14 16:49:08,721 INFO L130 PetriNetUnfolder]: For 410/411 co-relation queries the response was YES. [2021-12-14 16:49:08,722 INFO L84 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 186 events. 19/186 cut-off events. For 410/411 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 498 event pairs, 0 based on Foata normal form. 1/187 useless extension candidates. Maximal degree in co-relation 641. Up to 30 conditions per place. [2021-12-14 16:49:08,722 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 33 selfloop transitions, 12 changer transitions 29/129 dead transitions. [2021-12-14 16:49:08,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 129 transitions, 936 flow [2021-12-14 16:49:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:49:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-14 16:49:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1137 transitions. [2021-12-14 16:49:08,724 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6557093425605537 [2021-12-14 16:49:08,724 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1137 transitions. [2021-12-14 16:49:08,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1137 transitions. [2021-12-14 16:49:08,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:08,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1137 transitions. [2021-12-14 16:49:08,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.88235294117646) internal successors, (1137), 17 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:08,727 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) [2021-12-14 16:49:08,727 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) [2021-12-14 16:49:08,727 INFO L186 Difference]: Start difference. First operand has 176 places, 108 transitions, 619 flow. Second operand 17 states and 1137 transitions. [2021-12-14 16:49:08,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 129 transitions, 936 flow [2021-12-14 16:49:08,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 129 transitions, 845 flow, removed 25 selfloop flow, removed 9 redundant places. [2021-12-14 16:49:08,731 INFO L242 Difference]: Finished difference. Result has 182 places, 99 transitions, 480 flow [2021-12-14 16:49:08,731 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=480, PETRI_PLACES=182, PETRI_TRANSITIONS=99} [2021-12-14 16:49:08,732 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 91 predicate places. [2021-12-14 16:49:08,732 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 99 transitions, 480 flow [2021-12-14 16:49:08,732 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) [2021-12-14 16:49:08,732 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:08,732 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] [2021-12-14 16:49:08,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-14 16:49:08,733 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:49:08,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1634867008, now seen corresponding path program 20 times [2021-12-14 16:49:08,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:08,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405727148] [2021-12-14 16:49:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:08,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:08,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:08,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405727148] [2021-12-14 16:49:08,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405727148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:08,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:08,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:49:08,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519447105] [2021-12-14 16:49:08,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:08,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:49:08,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:49:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:49:08,810 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-14 16:49:08,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 99 transitions, 480 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) [2021-12-14 16:49:08,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:08,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-14 16:49:08,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:09,003 INFO L129 PetriNetUnfolder]: 11/120 cut-off events. [2021-12-14 16:49:09,003 INFO L130 PetriNetUnfolder]: For 228/229 co-relation queries the response was YES. [2021-12-14 16:49:09,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 120 events. 11/120 cut-off events. For 228/229 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 217 event pairs, 0 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 381. Up to 12 conditions per place. [2021-12-14 16:49:09,004 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 0 selfloop transitions, 0 changer transitions 88/88 dead transitions. [2021-12-14 16:49:09,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 88 transitions, 570 flow [2021-12-14 16:49:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:49:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:49:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1174 transitions. [2021-12-14 16:49:09,006 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6394335511982571 [2021-12-14 16:49:09,006 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1174 transitions. [2021-12-14 16:49:09,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1174 transitions. [2021-12-14 16:49:09,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:09,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1174 transitions. [2021-12-14 16:49:09,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 65.22222222222223) internal successors, (1174), 18 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:09,009 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) [2021-12-14 16:49:09,009 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) [2021-12-14 16:49:09,009 INFO L186 Difference]: Start difference. First operand has 182 places, 99 transitions, 480 flow. Second operand 18 states and 1174 transitions. [2021-12-14 16:49:09,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 88 transitions, 570 flow [2021-12-14 16:49:09,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 88 transitions, 466 flow, removed 21 selfloop flow, removed 22 redundant places. [2021-12-14 16:49:09,023 INFO L242 Difference]: Finished difference. Result has 146 places, 0 transitions, 0 flow [2021-12-14 16:49:09,024 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=129, 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=18, PETRI_FLOW=0, PETRI_PLACES=146, PETRI_TRANSITIONS=0} [2021-12-14 16:49:09,025 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 55 predicate places. [2021-12-14 16:49:09,025 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 0 transitions, 0 flow [2021-12-14 16:49:09,025 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) [2021-12-14 16:49:09,028 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-14 16:49:09,029 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-12-14 16:49:09,029 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-12-14 16:49:09,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-14 16:49:09,033 INFO L732 BasicCegarLoop]: Path program histogram: [20, 20, 2, 2, 2, 1] [2021-12-14 16:49:09,036 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-14 16:49:09,036 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 16:49:09,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 04:49:09 BasicIcfg [2021-12-14 16:49:09,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 16:49:09,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 16:49:09,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 16:49:09,048 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 16:49:09,049 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:48:48" (3/4) ... [2021-12-14 16:49:09,051 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-14 16:49:09,056 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-12-14 16:49:09,056 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-12-14 16:49:09,060 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-12-14 16:49:09,061 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-14 16:49:09,061 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-14 16:49:09,061 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-14 16:49:09,088 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-14 16:49:09,088 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 16:49:09,089 INFO L158 Benchmark]: Toolchain (without parser) took 21590.77ms. Allocated memory was 119.5MB in the beginning and 314.6MB in the end (delta: 195.0MB). Free memory was 92.3MB in the beginning and 136.8MB in the end (delta: -44.5MB). Peak memory consumption was 149.9MB. Max. memory is 16.1GB. [2021-12-14 16:49:09,089 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 119.5MB. Free memory is still 76.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 16:49:09,089 INFO L158 Benchmark]: CACSL2BoogieTranslator took 444.36ms. Allocated memory was 119.5MB in the beginning and 148.9MB in the end (delta: 29.4MB). Free memory was 91.9MB in the beginning and 122.5MB in the end (delta: -30.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 16:49:09,090 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.56ms. Allocated memory is still 148.9MB. Free memory was 122.5MB in the beginning and 120.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 16:49:09,090 INFO L158 Benchmark]: Boogie Preprocessor took 53.62ms. Allocated memory is still 148.9MB. Free memory was 120.8MB in the beginning and 119.6MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-14 16:49:09,090 INFO L158 Benchmark]: RCFGBuilder took 528.24ms. Allocated memory is still 148.9MB. Free memory was 119.6MB in the beginning and 107.9MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-14 16:49:09,090 INFO L158 Benchmark]: TraceAbstraction took 20451.44ms. Allocated memory was 148.9MB in the beginning and 314.6MB in the end (delta: 165.7MB). Free memory was 107.3MB in the beginning and 139.9MB in the end (delta: -32.6MB). Peak memory consumption was 135.0MB. Max. memory is 16.1GB. [2021-12-14 16:49:09,090 INFO L158 Benchmark]: Witness Printer took 40.17ms. Allocated memory is still 314.6MB. Free memory was 139.9MB in the beginning and 136.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 16:49:09,093 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 119.5MB. Free memory is still 76.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 444.36ms. Allocated memory was 119.5MB in the beginning and 148.9MB in the end (delta: 29.4MB). Free memory was 91.9MB in the beginning and 122.5MB in the end (delta: -30.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.56ms. Allocated memory is still 148.9MB. Free memory was 122.5MB in the beginning and 120.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 53.62ms. Allocated memory is still 148.9MB. Free memory was 120.8MB in the beginning and 119.6MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 528.24ms. Allocated memory is still 148.9MB. Free memory was 119.6MB in the beginning and 107.9MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 20451.44ms. Allocated memory was 148.9MB in the beginning and 314.6MB in the end (delta: 165.7MB). Free memory was 107.3MB in the beginning and 139.9MB in the end (delta: -32.6MB). Peak memory consumption was 135.0MB. Max. memory is 16.1GB. * Witness Printer took 40.17ms. Allocated memory is still 314.6MB. Free memory was 139.9MB in the beginning and 136.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 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: 20.3s, OverallIterations: 47, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 14.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1860 SdHoareTripleChecker+Valid, 4.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1860 mSDsluCounter, 9108 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8897 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7493 IncrementalHoareTripleChecker+Invalid, 7527 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 1789 mSDtfsCounter, 7493 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1020 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 874 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1178occurred in iteration=17, 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, 0.6s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 3611 NumberOfCodeBlocks, 3611 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 3564 ConstructedInterpolants, 0 QuantifiedInterpolants, 12503 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! [2021-12-14 16:49:09,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE