./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/chl-node-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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 12:01:24,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:01:24,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:01:24,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:01:24,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:01:24,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:01:24,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:01:24,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:01:24,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:01:24,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:01:24,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:01:24,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:01:24,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:01:24,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:01:24,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:01:24,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:01:24,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:01:24,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:01:24,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:01:24,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:01:24,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:01:24,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:01:24,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:01:24,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:01:24,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:01:24,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:01:24,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:01:24,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:01:24,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:01:24,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:01:24,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:01:24,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:01:24,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:01:24,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:01:24,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:01:24,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:01:24,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:01:24,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:01:24,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:01:24,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:01:24,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:01:24,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:01:24,489 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:01:24,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:01:24,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:01:24,490 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:01:24,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:01:24,491 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:01:24,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:01:24,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:01:24,492 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:01:24,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:01:24,493 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:01:24,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:01:24,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:01:24,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:01:24,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:01:24,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:01:24,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:01:24,494 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:01:24,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:01:24,494 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:01:24,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:01:24,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:01:24,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:01:24,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:01:24,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:01:24,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:01:24,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:01:24,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:01:24,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:01:24,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:01:24,496 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:01:24,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:01:24,496 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:01:24,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:01:24,497 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:01:24,497 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:01:24,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:01:24,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:01:24,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:01:24,778 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:01:24,778 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:01:24,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-09-01 12:01:25,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:01:26,084 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:01:26,085 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-09-01 12:01:26,107 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ef5db084/1c98ac2c77a04cec9b1c6aba58d6525b/FLAG187ede14f [2023-09-01 12:01:26,130 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ef5db084/1c98ac2c77a04cec9b1c6aba58d6525b [2023-09-01 12:01:26,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:01:26,133 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:01:26,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:01:26,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:01:26,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:01:26,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@213653c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26, skipping insertion in model container [2023-09-01 12:01:26,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:01:26,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:01:26,320 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c[3305,3318] [2023-09-01 12:01:26,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:01:26,346 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:01:26,378 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c[3305,3318] [2023-09-01 12:01:26,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:01:26,397 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:01:26,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26 WrapperNode [2023-09-01 12:01:26,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:01:26,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:01:26,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:01:26,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:01:26,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,489 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 294 [2023-09-01 12:01:26,493 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:01:26,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:01:26,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:01:26,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:01:26,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,524 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:01:26,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:01:26,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:01:26,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:01:26,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26" (1/1) ... [2023-09-01 12:01:26,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:01:26,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:26,574 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) [2023-09-01 12:01:26,601 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 [2023-09-01 12:01:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:01:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:01:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:01:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:01:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:01:26,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:01:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:01:26,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:01:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:01:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:01:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:01:26,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:01:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:01:26,625 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 12:01:26,724 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:01:26,726 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:01:27,060 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:01:27,068 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:01:27,068 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 12:01:27,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:01:27 BoogieIcfgContainer [2023-09-01 12:01:27,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:01:27,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:01:27,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:01:27,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:01:27,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:01:26" (1/3) ... [2023-09-01 12:01:27,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e1c902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:01:27, skipping insertion in model container [2023-09-01 12:01:27,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:26" (2/3) ... [2023-09-01 12:01:27,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e1c902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:01:27, skipping insertion in model container [2023-09-01 12:01:27,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:01:27" (3/3) ... [2023-09-01 12:01:27,077 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2023-09-01 12:01:27,082 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:01:27,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:01:27,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:01:27,089 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:01:27,178 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 12:01:27,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 322 places, 343 transitions, 702 flow [2023-09-01 12:01:27,346 INFO L130 PetriNetUnfolder]: 28/341 cut-off events. [2023-09-01 12:01:27,347 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:01:27,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 341 events. 28/341 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 339 event pairs, 0 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 270. Up to 2 conditions per place. [2023-09-01 12:01:27,353 INFO L82 GeneralOperation]: Start removeDead. Operand has 322 places, 343 transitions, 702 flow [2023-09-01 12:01:27,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 312 places, 333 transitions, 678 flow [2023-09-01 12:01:27,363 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:01:27,372 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 312 places, 333 transitions, 678 flow [2023-09-01 12:01:27,377 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 312 places, 333 transitions, 678 flow [2023-09-01 12:01:27,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 312 places, 333 transitions, 678 flow [2023-09-01 12:01:27,431 INFO L130 PetriNetUnfolder]: 28/333 cut-off events. [2023-09-01 12:01:27,431 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:01:27,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 333 events. 28/333 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 338 event pairs, 0 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 270. Up to 2 conditions per place. [2023-09-01 12:01:27,436 INFO L119 LiptonReduction]: Number of co-enabled transitions 6048 [2023-09-01 12:01:36,566 INFO L134 LiptonReduction]: Checked pairs total: 6391 [2023-09-01 12:01:36,566 INFO L136 LiptonReduction]: Total number of compositions: 393 [2023-09-01 12:01:36,584 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:01:36,591 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@16b4c892, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:01:36,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 12:01:36,603 INFO L130 PetriNetUnfolder]: 5/24 cut-off events. [2023-09-01 12:01:36,603 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:01:36,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:36,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:36,604 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:36,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:36,609 INFO L85 PathProgramCache]: Analyzing trace with hash 432883374, now seen corresponding path program 1 times [2023-09-01 12:01:36,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:36,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179234881] [2023-09-01 12:01:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:36,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:01:37,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:37,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179234881] [2023-09-01 12:01:37,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179234881] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:37,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:37,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 12:01:37,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069727553] [2023-09-01 12:01:37,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:37,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:01:37,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:01:37,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:01:37,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 736 [2023-09-01 12:01:37,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:37,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 736 [2023-09-01 12:01:37,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:37,160 INFO L130 PetriNetUnfolder]: 49/103 cut-off events. [2023-09-01 12:01:37,160 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-09-01 12:01:37,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 103 events. 49/103 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 39 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 182. Up to 103 conditions per place. [2023-09-01 12:01:37,164 INFO L137 encePairwiseOnDemand]: 733/736 looper letters, 24 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-09-01 12:01:37,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 116 flow [2023-09-01 12:01:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:01:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:01:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 957 transitions. [2023-09-01 12:01:37,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43342391304347827 [2023-09-01 12:01:37,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 957 transitions. [2023-09-01 12:01:37,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 957 transitions. [2023-09-01 12:01:37,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:37,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 957 transitions. [2023-09-01 12:01:37,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 736.0) internal successors, (2944), 4 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 736.0) internal successors, (2944), 4 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,202 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 3 states and 957 transitions. [2023-09-01 12:01:37,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 116 flow [2023-09-01 12:01:37,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 12:01:37,206 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 66 flow [2023-09-01 12:01:37,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2023-09-01 12:01:37,210 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2023-09-01 12:01:37,210 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 66 flow [2023-09-01 12:01:37,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:37,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:37,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:01:37,212 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:37,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:37,229 INFO L85 PathProgramCache]: Analyzing trace with hash 855870377, now seen corresponding path program 1 times [2023-09-01 12:01:37,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:37,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493241336] [2023-09-01 12:01:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:37,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:01:37,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:37,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493241336] [2023-09-01 12:01:37,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493241336] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:37,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:37,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:01:37,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423935968] [2023-09-01 12:01:37,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:37,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:01:37,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:37,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:01:37,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:01:37,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 736 [2023-09-01 12:01:37,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 312.75) internal successors, (1251), 4 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:37,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 736 [2023-09-01 12:01:37,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:37,538 INFO L130 PetriNetUnfolder]: 49/104 cut-off events. [2023-09-01 12:01:37,538 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 12:01:37,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 104 events. 49/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 39 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 214. Up to 102 conditions per place. [2023-09-01 12:01:37,539 INFO L137 encePairwiseOnDemand]: 731/736 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-09-01 12:01:37,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 122 flow [2023-09-01 12:01:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:01:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:01:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1260 transitions. [2023-09-01 12:01:37,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279891304347826 [2023-09-01 12:01:37,543 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1260 transitions. [2023-09-01 12:01:37,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1260 transitions. [2023-09-01 12:01:37,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:37,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1260 transitions. [2023-09-01 12:01:37,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 736.0) internal successors, (3680), 5 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,551 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 736.0) internal successors, (3680), 5 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,551 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 66 flow. Second operand 4 states and 1260 transitions. [2023-09-01 12:01:37,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 122 flow [2023-09-01 12:01:37,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 118 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 12:01:37,553 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 80 flow [2023-09-01 12:01:37,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2023-09-01 12:01:37,553 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-09-01 12:01:37,554 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 80 flow [2023-09-01 12:01:37,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 312.75) internal successors, (1251), 4 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:37,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:37,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:01:37,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:37,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:37,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1025184123, now seen corresponding path program 1 times [2023-09-01 12:01:37,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:37,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967017014] [2023-09-01 12:01:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:01:37,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:37,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967017014] [2023-09-01 12:01:37,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967017014] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:37,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:37,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:01:37,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523024936] [2023-09-01 12:01:37,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:37,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:01:37,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:37,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:01:37,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:01:37,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 736 [2023-09-01 12:01:37,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:37,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 736 [2023-09-01 12:01:37,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:37,790 INFO L130 PetriNetUnfolder]: 49/105 cut-off events. [2023-09-01 12:01:37,790 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 12:01:37,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 105 events. 49/105 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 39 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 214. Up to 104 conditions per place. [2023-09-01 12:01:37,791 INFO L137 encePairwiseOnDemand]: 732/736 looper letters, 25 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2023-09-01 12:01:37,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 138 flow [2023-09-01 12:01:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:01:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:01:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1259 transitions. [2023-09-01 12:01:37,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42764945652173914 [2023-09-01 12:01:37,794 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1259 transitions. [2023-09-01 12:01:37,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1259 transitions. [2023-09-01 12:01:37,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:37,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1259 transitions. [2023-09-01 12:01:37,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 314.75) internal successors, (1259), 4 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 736.0) internal successors, (3680), 5 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,801 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 736.0) internal successors, (3680), 5 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,801 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 80 flow. Second operand 4 states and 1259 transitions. [2023-09-01 12:01:37,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 138 flow [2023-09-01 12:01:37,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 137 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:01:37,803 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 93 flow [2023-09-01 12:01:37,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-09-01 12:01:37,803 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-09-01 12:01:37,804 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 93 flow [2023-09-01 12:01:37,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:37,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:37,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:01:37,805 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:37,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:37,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2006272341, now seen corresponding path program 1 times [2023-09-01 12:01:37,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:37,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625389862] [2023-09-01 12:01:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:37,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:01:37,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:37,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625389862] [2023-09-01 12:01:37,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625389862] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:37,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:37,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:01:37,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502625997] [2023-09-01 12:01:37,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:37,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:01:37,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:37,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:01:37,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:01:37,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 736 [2023-09-01 12:01:37,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:37,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:37,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 736 [2023-09-01 12:01:37,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:38,039 INFO L130 PetriNetUnfolder]: 49/106 cut-off events. [2023-09-01 12:01:38,039 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 12:01:38,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 106 events. 49/106 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 39 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 221. Up to 105 conditions per place. [2023-09-01 12:01:38,042 INFO L137 encePairwiseOnDemand]: 732/736 looper letters, 26 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-09-01 12:01:38,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 153 flow [2023-09-01 12:01:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:01:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:01:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1259 transitions. [2023-09-01 12:01:38,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42764945652173914 [2023-09-01 12:01:38,045 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1259 transitions. [2023-09-01 12:01:38,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1259 transitions. [2023-09-01 12:01:38,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:38,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1259 transitions. [2023-09-01 12:01:38,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 314.75) internal successors, (1259), 4 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:38,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 736.0) internal successors, (3680), 5 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:38,053 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 736.0) internal successors, (3680), 5 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:38,054 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 93 flow. Second operand 4 states and 1259 transitions. [2023-09-01 12:01:38,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 153 flow [2023-09-01 12:01:38,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 147 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 12:01:38,055 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 101 flow [2023-09-01 12:01:38,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-09-01 12:01:38,057 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2023-09-01 12:01:38,057 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 101 flow [2023-09-01 12:01:38,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:38,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:38,058 INFO L208 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] [2023-09-01 12:01:38,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 12:01:38,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:38,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:38,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1187833151, now seen corresponding path program 1 times [2023-09-01 12:01:38,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:38,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164449494] [2023-09-01 12:01:38,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:38,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:39,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:39,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164449494] [2023-09-01 12:01:39,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164449494] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:39,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:39,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 12:01:39,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574908136] [2023-09-01 12:01:39,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:39,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:01:39,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:39,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:01:39,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:01:39,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-09-01 12:01:39,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 101 flow. Second operand has 10 states, 10 states have (on average 276.2) internal successors, (2762), 10 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:39,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:39,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-09-01 12:01:39,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:39,977 INFO L130 PetriNetUnfolder]: 83/192 cut-off events. [2023-09-01 12:01:39,977 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 12:01:39,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 192 events. 83/192 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 724 event pairs, 8 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 402. Up to 84 conditions per place. [2023-09-01 12:01:39,978 INFO L137 encePairwiseOnDemand]: 725/736 looper letters, 50 selfloop transitions, 14 changer transitions 5/69 dead transitions. [2023-09-01 12:01:39,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 69 transitions, 330 flow [2023-09-01 12:01:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:01:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:01:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2806 transitions. [2023-09-01 12:01:39,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2023-09-01 12:01:39,983 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2806 transitions. [2023-09-01 12:01:39,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2806 transitions. [2023-09-01 12:01:39,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:39,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2806 transitions. [2023-09-01 12:01:39,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 280.6) internal successors, (2806), 10 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:39,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 736.0) internal successors, (8096), 11 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:39,995 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 736.0) internal successors, (8096), 11 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:39,995 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 101 flow. Second operand 10 states and 2806 transitions. [2023-09-01 12:01:39,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 69 transitions, 330 flow [2023-09-01 12:01:39,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 69 transitions, 324 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 12:01:39,997 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 177 flow [2023-09-01 12:01:39,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=177, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-09-01 12:01:39,998 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 19 predicate places. [2023-09-01 12:01:39,998 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 177 flow [2023-09-01 12:01:39,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 276.2) internal successors, (2762), 10 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:39,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:39,999 INFO L208 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] [2023-09-01 12:01:40,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 12:01:40,000 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:40,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1223626605, now seen corresponding path program 2 times [2023-09-01 12:01:40,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:40,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075174515] [2023-09-01 12:01:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:40,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:40,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:40,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075174515] [2023-09-01 12:01:40,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075174515] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:40,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:40,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 12:01:40,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286191274] [2023-09-01 12:01:40,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:40,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 12:01:40,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:40,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 12:01:40,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-09-01 12:01:41,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 736 [2023-09-01 12:01:41,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 177 flow. Second operand has 7 states, 7 states have (on average 284.14285714285717) internal successors, (1989), 7 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:41,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:41,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 736 [2023-09-01 12:01:41,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:42,060 INFO L130 PetriNetUnfolder]: 88/215 cut-off events. [2023-09-01 12:01:42,060 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2023-09-01 12:01:42,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 215 events. 88/215 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 826 event pairs, 16 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 634. Up to 88 conditions per place. [2023-09-01 12:01:42,062 INFO L137 encePairwiseOnDemand]: 727/736 looper letters, 53 selfloop transitions, 18 changer transitions 5/76 dead transitions. [2023-09-01 12:01:42,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 460 flow [2023-09-01 12:01:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:01:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:01:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2589 transitions. [2023-09-01 12:01:42,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908514492753623 [2023-09-01 12:01:42,067 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2589 transitions. [2023-09-01 12:01:42,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2589 transitions. [2023-09-01 12:01:42,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:42,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2589 transitions. [2023-09-01 12:01:42,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 287.6666666666667) internal successors, (2589), 9 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:42,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:42,094 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:42,094 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 177 flow. Second operand 9 states and 2589 transitions. [2023-09-01 12:01:42,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 460 flow [2023-09-01 12:01:42,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 453 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 12:01:42,100 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 297 flow [2023-09-01 12:01:42,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=297, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-09-01 12:01:42,102 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2023-09-01 12:01:42,102 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 297 flow [2023-09-01 12:01:42,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 284.14285714285717) internal successors, (1989), 7 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:42,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:42,105 INFO L208 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] [2023-09-01 12:01:42,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 12:01:42,105 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:42,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:42,106 INFO L85 PathProgramCache]: Analyzing trace with hash -12608099, now seen corresponding path program 3 times [2023-09-01 12:01:42,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:42,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871841028] [2023-09-01 12:01:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:42,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:42,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:42,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871841028] [2023-09-01 12:01:42,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871841028] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:42,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:42,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 12:01:42,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641677488] [2023-09-01 12:01:42,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:42,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 12:01:42,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:42,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 12:01:42,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-09-01 12:01:43,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 736 [2023-09-01 12:01:43,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 284.14285714285717) internal successors, (1989), 7 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:43,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:43,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 736 [2023-09-01 12:01:43,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:43,350 INFO L130 PetriNetUnfolder]: 127/319 cut-off events. [2023-09-01 12:01:43,350 INFO L131 PetriNetUnfolder]: For 551/551 co-relation queries the response was YES. [2023-09-01 12:01:43,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 319 events. 127/319 cut-off events. For 551/551 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1479 event pairs, 49 based on Foata normal form. 1/319 useless extension candidates. Maximal degree in co-relation 1104. Up to 160 conditions per place. [2023-09-01 12:01:43,352 INFO L137 encePairwiseOnDemand]: 727/736 looper letters, 50 selfloop transitions, 31 changer transitions 5/86 dead transitions. [2023-09-01 12:01:43,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 86 transitions, 643 flow [2023-09-01 12:01:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:01:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:01:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2310 transitions. [2023-09-01 12:01:43,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923233695652174 [2023-09-01 12:01:43,356 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2310 transitions. [2023-09-01 12:01:43,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2310 transitions. [2023-09-01 12:01:43,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:43,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2310 transitions. [2023-09-01 12:01:43,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 288.75) internal successors, (2310), 8 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:43,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 736.0) internal successors, (6624), 9 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:43,375 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 736.0) internal successors, (6624), 9 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:43,375 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 297 flow. Second operand 8 states and 2310 transitions. [2023-09-01 12:01:43,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 86 transitions, 643 flow [2023-09-01 12:01:43,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 629 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-09-01 12:01:43,379 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 482 flow [2023-09-01 12:01:43,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=482, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-09-01 12:01:43,380 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 37 predicate places. [2023-09-01 12:01:43,380 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 482 flow [2023-09-01 12:01:43,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 284.14285714285717) internal successors, (1989), 7 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:43,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:43,381 INFO L208 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] [2023-09-01 12:01:43,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 12:01:43,381 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:43,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:43,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1226252381, now seen corresponding path program 4 times [2023-09-01 12:01:43,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:43,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880816962] [2023-09-01 12:01:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:43,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:43,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:43,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880816962] [2023-09-01 12:01:43,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880816962] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:43,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:43,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 12:01:43,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383706345] [2023-09-01 12:01:43,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:43,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 12:01:43,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 12:01:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-09-01 12:01:44,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 736 [2023-09-01 12:01:44,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 482 flow. Second operand has 7 states, 7 states have (on average 293.14285714285717) internal successors, (2052), 7 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:44,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:44,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 736 [2023-09-01 12:01:44,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:44,535 INFO L130 PetriNetUnfolder]: 126/320 cut-off events. [2023-09-01 12:01:44,536 INFO L131 PetriNetUnfolder]: For 769/769 co-relation queries the response was YES. [2023-09-01 12:01:44,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1294 conditions, 320 events. 126/320 cut-off events. For 769/769 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1513 event pairs, 37 based on Foata normal form. 1/320 useless extension candidates. Maximal degree in co-relation 1258. Up to 178 conditions per place. [2023-09-01 12:01:44,538 INFO L137 encePairwiseOnDemand]: 729/736 looper letters, 77 selfloop transitions, 12 changer transitions 5/94 dead transitions. [2023-09-01 12:01:44,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 809 flow [2023-09-01 12:01:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:01:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:01:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2095 transitions. [2023-09-01 12:01:44,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40663819875776397 [2023-09-01 12:01:44,542 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2095 transitions. [2023-09-01 12:01:44,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2095 transitions. [2023-09-01 12:01:44,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:44,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2095 transitions. [2023-09-01 12:01:44,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 299.2857142857143) internal successors, (2095), 7 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:44,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 736.0) internal successors, (5888), 8 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:44,550 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 736.0) internal successors, (5888), 8 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:44,550 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 482 flow. Second operand 7 states and 2095 transitions. [2023-09-01 12:01:44,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 809 flow [2023-09-01 12:01:44,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 791 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 12:01:44,554 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 565 flow [2023-09-01 12:01:44,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=565, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2023-09-01 12:01:44,555 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2023-09-01 12:01:44,555 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 565 flow [2023-09-01 12:01:44,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 293.14285714285717) internal successors, (2052), 7 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:44,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:44,556 INFO L208 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] [2023-09-01 12:01:44,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 12:01:44,556 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:44,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1088873191, now seen corresponding path program 5 times [2023-09-01 12:01:44,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:44,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174400897] [2023-09-01 12:01:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:44,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:45,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:45,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174400897] [2023-09-01 12:01:45,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174400897] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:45,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:45,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 12:01:45,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762015910] [2023-09-01 12:01:45,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:45,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 12:01:45,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 12:01:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 12:01:45,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 736 [2023-09-01 12:01:45,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 565 flow. Second operand has 7 states, 7 states have (on average 286.14285714285717) internal successors, (2003), 7 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:45,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:45,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 736 [2023-09-01 12:01:45,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:45,668 INFO L130 PetriNetUnfolder]: 125/313 cut-off events. [2023-09-01 12:01:45,669 INFO L131 PetriNetUnfolder]: For 1118/1118 co-relation queries the response was YES. [2023-09-01 12:01:45,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1374 conditions, 313 events. 125/313 cut-off events. For 1118/1118 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1432 event pairs, 53 based on Foata normal form. 1/313 useless extension candidates. Maximal degree in co-relation 1333. Up to 178 conditions per place. [2023-09-01 12:01:45,671 INFO L137 encePairwiseOnDemand]: 728/736 looper letters, 61 selfloop transitions, 19 changer transitions 9/89 dead transitions. [2023-09-01 12:01:45,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 833 flow [2023-09-01 12:01:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:01:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:01:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2039 transitions. [2023-09-01 12:01:45,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39576863354037267 [2023-09-01 12:01:45,675 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2039 transitions. [2023-09-01 12:01:45,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2039 transitions. [2023-09-01 12:01:45,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:45,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2039 transitions. [2023-09-01 12:01:45,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 291.2857142857143) internal successors, (2039), 7 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:45,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 736.0) internal successors, (5888), 8 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:45,683 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 736.0) internal successors, (5888), 8 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:45,683 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 565 flow. Second operand 7 states and 2039 transitions. [2023-09-01 12:01:45,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 833 flow [2023-09-01 12:01:45,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 89 transitions, 818 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 12:01:45,688 INFO L231 Difference]: Finished difference. Result has 79 places, 69 transitions, 639 flow [2023-09-01 12:01:45,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=639, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2023-09-01 12:01:45,688 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 52 predicate places. [2023-09-01 12:01:45,688 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 639 flow [2023-09-01 12:01:45,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 286.14285714285717) internal successors, (2003), 7 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:45,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:45,689 INFO L208 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] [2023-09-01 12:01:45,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 12:01:45,689 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:45,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:45,690 INFO L85 PathProgramCache]: Analyzing trace with hash 73416431, now seen corresponding path program 6 times [2023-09-01 12:01:45,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:45,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167512186] [2023-09-01 12:01:45,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:45,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:46,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:46,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167512186] [2023-09-01 12:01:46,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167512186] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:46,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:46,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 12:01:46,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256457471] [2023-09-01 12:01:46,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:46,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:01:46,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:46,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:01:46,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:01:47,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-09-01 12:01:47,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 639 flow. Second operand has 10 states, 10 states have (on average 276.2) internal successors, (2762), 10 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:47,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:47,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-09-01 12:01:47,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:47,441 INFO L130 PetriNetUnfolder]: 126/320 cut-off events. [2023-09-01 12:01:47,441 INFO L131 PetriNetUnfolder]: For 1229/1229 co-relation queries the response was YES. [2023-09-01 12:01:47,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468 conditions, 320 events. 126/320 cut-off events. For 1229/1229 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1502 event pairs, 15 based on Foata normal form. 1/320 useless extension candidates. Maximal degree in co-relation 1425. Up to 120 conditions per place. [2023-09-01 12:01:47,443 INFO L137 encePairwiseOnDemand]: 725/736 looper letters, 57 selfloop transitions, 33 changer transitions 5/95 dead transitions. [2023-09-01 12:01:47,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 95 transitions, 948 flow [2023-09-01 12:01:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:01:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:01:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2797 transitions. [2023-09-01 12:01:47,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38002717391304347 [2023-09-01 12:01:47,449 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2797 transitions. [2023-09-01 12:01:47,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2797 transitions. [2023-09-01 12:01:47,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:47,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2797 transitions. [2023-09-01 12:01:47,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 279.7) internal successors, (2797), 10 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:47,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 736.0) internal successors, (8096), 11 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:47,459 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 736.0) internal successors, (8096), 11 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:47,459 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 639 flow. Second operand 10 states and 2797 transitions. [2023-09-01 12:01:47,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 95 transitions, 948 flow [2023-09-01 12:01:47,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 915 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-09-01 12:01:47,465 INFO L231 Difference]: Finished difference. Result has 89 places, 73 transitions, 779 flow [2023-09-01 12:01:47,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=779, PETRI_PLACES=89, PETRI_TRANSITIONS=73} [2023-09-01 12:01:47,466 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 62 predicate places. [2023-09-01 12:01:47,466 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 779 flow [2023-09-01 12:01:47,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 276.2) internal successors, (2762), 10 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:47,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:47,467 INFO L208 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] [2023-09-01 12:01:47,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 12:01:47,468 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:47,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash 328223971, now seen corresponding path program 7 times [2023-09-01 12:01:47,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:47,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119881786] [2023-09-01 12:01:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:47,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:48,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:48,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119881786] [2023-09-01 12:01:48,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119881786] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:48,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:48,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 12:01:48,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589002368] [2023-09-01 12:01:48,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:48,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:01:48,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:48,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:01:48,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:01:48,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-09-01 12:01:48,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 73 transitions, 779 flow. Second operand has 10 states, 10 states have (on average 276.2) internal successors, (2762), 10 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:48,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:48,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-09-01 12:01:48,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:49,093 INFO L130 PetriNetUnfolder]: 125/313 cut-off events. [2023-09-01 12:01:49,093 INFO L131 PetriNetUnfolder]: For 1813/1813 co-relation queries the response was YES. [2023-09-01 12:01:49,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 313 events. 125/313 cut-off events. For 1813/1813 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1428 event pairs, 41 based on Foata normal form. 1/313 useless extension candidates. Maximal degree in co-relation 1561. Up to 212 conditions per place. [2023-09-01 12:01:49,095 INFO L137 encePairwiseOnDemand]: 725/736 looper letters, 44 selfloop transitions, 39 changer transitions 5/88 dead transitions. [2023-09-01 12:01:49,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 88 transitions, 1019 flow [2023-09-01 12:01:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:01:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:01:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2515 transitions. [2023-09-01 12:01:49,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37967995169082125 [2023-09-01 12:01:49,101 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2515 transitions. [2023-09-01 12:01:49,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2515 transitions. [2023-09-01 12:01:49,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:49,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2515 transitions. [2023-09-01 12:01:49,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 279.44444444444446) internal successors, (2515), 9 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:49,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:49,113 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:49,113 INFO L175 Difference]: Start difference. First operand has 89 places, 73 transitions, 779 flow. Second operand 9 states and 2515 transitions. [2023-09-01 12:01:49,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 88 transitions, 1019 flow [2023-09-01 12:01:49,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 88 transitions, 1001 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-09-01 12:01:49,120 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 905 flow [2023-09-01 12:01:49,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=905, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-09-01 12:01:49,121 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 67 predicate places. [2023-09-01 12:01:49,121 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 905 flow [2023-09-01 12:01:49,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 276.2) internal successors, (2762), 10 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:49,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:49,122 INFO L208 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] [2023-09-01 12:01:49,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 12:01:49,122 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:49,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1402950657, now seen corresponding path program 8 times [2023-09-01 12:01:49,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:49,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626361163] [2023-09-01 12:01:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:49,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:49,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:49,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626361163] [2023-09-01 12:01:49,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626361163] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:49,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:49,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 12:01:49,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426057018] [2023-09-01 12:01:49,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:49,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:01:49,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:49,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:01:49,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:01:50,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-09-01 12:01:50,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 905 flow. Second operand has 11 states, 11 states have (on average 276.0) internal successors, (3036), 11 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:50,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:50,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-09-01 12:01:50,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:50,933 INFO L130 PetriNetUnfolder]: 149/375 cut-off events. [2023-09-01 12:01:50,934 INFO L131 PetriNetUnfolder]: For 2815/2815 co-relation queries the response was YES. [2023-09-01 12:01:50,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2060 conditions, 375 events. 149/375 cut-off events. For 2815/2815 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1891 event pairs, 11 based on Foata normal form. 1/375 useless extension candidates. Maximal degree in co-relation 2009. Up to 122 conditions per place. [2023-09-01 12:01:50,936 INFO L137 encePairwiseOnDemand]: 726/736 looper letters, 59 selfloop transitions, 46 changer transitions 5/110 dead transitions. [2023-09-01 12:01:50,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 110 transitions, 1344 flow [2023-09-01 12:01:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:01:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:01:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2531 transitions. [2023-09-01 12:01:50,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3820954106280193 [2023-09-01 12:01:50,942 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2531 transitions. [2023-09-01 12:01:50,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2531 transitions. [2023-09-01 12:01:50,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:50,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2531 transitions. [2023-09-01 12:01:50,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 281.22222222222223) internal successors, (2531), 9 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:50,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:50,969 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:50,969 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 905 flow. Second operand 9 states and 2531 transitions. [2023-09-01 12:01:50,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 110 transitions, 1344 flow [2023-09-01 12:01:50,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 110 transitions, 1287 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-09-01 12:01:50,980 INFO L231 Difference]: Finished difference. Result has 99 places, 83 transitions, 1121 flow [2023-09-01 12:01:50,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1121, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2023-09-01 12:01:50,981 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 72 predicate places. [2023-09-01 12:01:50,981 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 1121 flow [2023-09-01 12:01:50,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 276.0) internal successors, (3036), 11 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:50,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:50,982 INFO L208 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] [2023-09-01 12:01:50,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 12:01:50,983 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:50,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:50,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1906425293, now seen corresponding path program 9 times [2023-09-01 12:01:50,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:50,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726587971] [2023-09-01 12:01:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:50,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:51,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:51,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726587971] [2023-09-01 12:01:51,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726587971] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:51,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:51,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 12:01:51,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448505568] [2023-09-01 12:01:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:51,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:01:51,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:51,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:01:51,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:01:51,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 736 [2023-09-01 12:01:52,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 1121 flow. Second operand has 10 states, 10 states have (on average 278.2) internal successors, (2782), 10 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:52,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:52,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 736 [2023-09-01 12:01:52,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:52,330 INFO L130 PetriNetUnfolder]: 148/368 cut-off events. [2023-09-01 12:01:52,330 INFO L131 PetriNetUnfolder]: For 3810/3810 co-relation queries the response was YES. [2023-09-01 12:01:52,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2227 conditions, 368 events. 148/368 cut-off events. For 3810/3810 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1830 event pairs, 38 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 2174. Up to 196 conditions per place. [2023-09-01 12:01:52,333 INFO L137 encePairwiseOnDemand]: 726/736 looper letters, 62 selfloop transitions, 28 changer transitions 10/100 dead transitions. [2023-09-01 12:01:52,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 100 transitions, 1391 flow [2023-09-01 12:01:52,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:01:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:01:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2537 transitions. [2023-09-01 12:01:52,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3830012077294686 [2023-09-01 12:01:52,338 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2537 transitions. [2023-09-01 12:01:52,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2537 transitions. [2023-09-01 12:01:52,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:52,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2537 transitions. [2023-09-01 12:01:52,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 281.8888888888889) internal successors, (2537), 9 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:52,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:52,346 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:52,346 INFO L175 Difference]: Start difference. First operand has 99 places, 83 transitions, 1121 flow. Second operand 9 states and 2537 transitions. [2023-09-01 12:01:52,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 100 transitions, 1391 flow [2023-09-01 12:01:52,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 1368 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-09-01 12:01:52,362 INFO L231 Difference]: Finished difference. Result has 105 places, 83 transitions, 1179 flow [2023-09-01 12:01:52,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1179, PETRI_PLACES=105, PETRI_TRANSITIONS=83} [2023-09-01 12:01:52,363 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2023-09-01 12:01:52,363 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 83 transitions, 1179 flow [2023-09-01 12:01:52,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 278.2) internal successors, (2782), 10 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:52,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:52,364 INFO L208 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] [2023-09-01 12:01:52,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 12:01:52,364 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:52,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1423168621, now seen corresponding path program 10 times [2023-09-01 12:01:52,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:52,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560348481] [2023-09-01 12:01:52,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:52,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:53,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:53,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560348481] [2023-09-01 12:01:53,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560348481] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:53,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:53,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 12:01:53,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591620671] [2023-09-01 12:01:53,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:53,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:01:53,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:53,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:01:53,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:01:53,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-09-01 12:01:53,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 83 transitions, 1179 flow. Second operand has 11 states, 11 states have (on average 276.0) internal successors, (3036), 11 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:53,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:53,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-09-01 12:01:53,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:54,099 INFO L130 PetriNetUnfolder]: 143/352 cut-off events. [2023-09-01 12:01:54,099 INFO L131 PetriNetUnfolder]: For 3798/3798 co-relation queries the response was YES. [2023-09-01 12:01:54,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2222 conditions, 352 events. 143/352 cut-off events. For 3798/3798 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1696 event pairs, 40 based on Foata normal form. 1/352 useless extension candidates. Maximal degree in co-relation 2169. Up to 229 conditions per place. [2023-09-01 12:01:54,102 INFO L137 encePairwiseOnDemand]: 726/736 looper letters, 48 selfloop transitions, 45 changer transitions 5/98 dead transitions. [2023-09-01 12:01:54,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 98 transitions, 1445 flow [2023-09-01 12:01:54,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:01:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:01:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2240 transitions. [2023-09-01 12:01:54,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804347826086957 [2023-09-01 12:01:54,107 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2240 transitions. [2023-09-01 12:01:54,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2240 transitions. [2023-09-01 12:01:54,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:54,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2240 transitions. [2023-09-01 12:01:54,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 280.0) internal successors, (2240), 8 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:54,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 736.0) internal successors, (6624), 9 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:54,115 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 736.0) internal successors, (6624), 9 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:54,115 INFO L175 Difference]: Start difference. First operand has 105 places, 83 transitions, 1179 flow. Second operand 8 states and 2240 transitions. [2023-09-01 12:01:54,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 98 transitions, 1445 flow [2023-09-01 12:01:54,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 1375 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-09-01 12:01:54,137 INFO L231 Difference]: Finished difference. Result has 105 places, 85 transitions, 1276 flow [2023-09-01 12:01:54,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1276, PETRI_PLACES=105, PETRI_TRANSITIONS=85} [2023-09-01 12:01:54,138 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2023-09-01 12:01:54,138 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 85 transitions, 1276 flow [2023-09-01 12:01:54,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 276.0) internal successors, (3036), 11 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:54,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:54,139 INFO L208 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] [2023-09-01 12:01:54,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 12:01:54,139 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:54,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:54,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1807068179, now seen corresponding path program 11 times [2023-09-01 12:01:54,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:54,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577903041] [2023-09-01 12:01:54,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:54,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:54,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:54,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577903041] [2023-09-01 12:01:54,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577903041] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:54,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:54,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 12:01:54,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912767550] [2023-09-01 12:01:54,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:54,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:01:54,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:54,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:01:54,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:01:55,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 736 [2023-09-01 12:01:55,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 85 transitions, 1276 flow. Second operand has 11 states, 11 states have (on average 285.0) internal successors, (3135), 11 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:55,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:55,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 736 [2023-09-01 12:01:55,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:55,697 INFO L130 PetriNetUnfolder]: 143/362 cut-off events. [2023-09-01 12:01:55,697 INFO L131 PetriNetUnfolder]: For 4462/4462 co-relation queries the response was YES. [2023-09-01 12:01:55,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2364 conditions, 362 events. 143/362 cut-off events. For 4462/4462 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1787 event pairs, 22 based on Foata normal form. 2/363 useless extension candidates. Maximal degree in co-relation 2310. Up to 246 conditions per place. [2023-09-01 12:01:55,700 INFO L137 encePairwiseOnDemand]: 729/736 looper letters, 79 selfloop transitions, 18 changer transitions 9/106 dead transitions. [2023-09-01 12:01:55,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 1614 flow [2023-09-01 12:01:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:01:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:01:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2314 transitions. [2023-09-01 12:01:55,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930027173913043 [2023-09-01 12:01:55,702 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2314 transitions. [2023-09-01 12:01:55,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2314 transitions. [2023-09-01 12:01:55,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:55,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2314 transitions. [2023-09-01 12:01:55,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 289.25) internal successors, (2314), 8 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:55,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 736.0) internal successors, (6624), 9 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:55,709 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 736.0) internal successors, (6624), 9 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:55,709 INFO L175 Difference]: Start difference. First operand has 105 places, 85 transitions, 1276 flow. Second operand 8 states and 2314 transitions. [2023-09-01 12:01:55,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 1614 flow [2023-09-01 12:01:55,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 106 transitions, 1513 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-09-01 12:01:55,722 INFO L231 Difference]: Finished difference. Result has 107 places, 83 transitions, 1194 flow [2023-09-01 12:01:55,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1194, PETRI_PLACES=107, PETRI_TRANSITIONS=83} [2023-09-01 12:01:55,723 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 80 predicate places. [2023-09-01 12:01:55,723 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 83 transitions, 1194 flow [2023-09-01 12:01:55,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 285.0) internal successors, (3135), 11 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:55,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:55,724 INFO L208 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] [2023-09-01 12:01:55,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 12:01:55,724 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:55,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1455020015, now seen corresponding path program 12 times [2023-09-01 12:01:55,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:55,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658607713] [2023-09-01 12:01:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:55,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:56,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:56,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658607713] [2023-09-01 12:01:56,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658607713] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:56,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:56,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 12:01:56,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483644681] [2023-09-01 12:01:56,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:56,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:01:56,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:56,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:01:56,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:01:57,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 736 [2023-09-01 12:01:57,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 83 transitions, 1194 flow. Second operand has 12 states, 12 states have (on average 271.8333333333333) internal successors, (3262), 12 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:57,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:57,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 736 [2023-09-01 12:01:57,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:57,674 INFO L130 PetriNetUnfolder]: 134/336 cut-off events. [2023-09-01 12:01:57,674 INFO L131 PetriNetUnfolder]: For 3865/3865 co-relation queries the response was YES. [2023-09-01 12:01:57,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2152 conditions, 336 events. 134/336 cut-off events. For 3865/3865 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1582 event pairs, 13 based on Foata normal form. 1/336 useless extension candidates. Maximal degree in co-relation 2100. Up to 94 conditions per place. [2023-09-01 12:01:57,677 INFO L137 encePairwiseOnDemand]: 725/736 looper letters, 46 selfloop transitions, 47 changer transitions 8/101 dead transitions. [2023-09-01 12:01:57,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 101 transitions, 1475 flow [2023-09-01 12:01:57,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:01:57,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:01:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2482 transitions. [2023-09-01 12:01:57,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37469806763285024 [2023-09-01 12:01:57,680 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2482 transitions. [2023-09-01 12:01:57,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2482 transitions. [2023-09-01 12:01:57,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:57,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2482 transitions. [2023-09-01 12:01:57,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 275.77777777777777) internal successors, (2482), 9 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:57,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:57,687 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:57,687 INFO L175 Difference]: Start difference. First operand has 107 places, 83 transitions, 1194 flow. Second operand 9 states and 2482 transitions. [2023-09-01 12:01:57,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 101 transitions, 1475 flow [2023-09-01 12:01:57,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 101 transitions, 1378 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-09-01 12:01:57,699 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 1234 flow [2023-09-01 12:01:57,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1234, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2023-09-01 12:01:57,700 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 77 predicate places. [2023-09-01 12:01:57,701 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 1234 flow [2023-09-01 12:01:57,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 271.8333333333333) internal successors, (3262), 12 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:57,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:57,701 INFO L208 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] [2023-09-01 12:01:57,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 12:01:57,702 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:57,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:57,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1783573119, now seen corresponding path program 1 times [2023-09-01 12:01:57,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:57,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375745067] [2023-09-01 12:01:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:57,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:58,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:58,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375745067] [2023-09-01 12:01:58,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375745067] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:58,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:58,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 12:01:58,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979689557] [2023-09-01 12:01:58,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:58,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 12:01:58,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:58,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 12:01:58,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 12:01:58,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 736 [2023-09-01 12:01:58,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 1234 flow. Second operand has 7 states, 7 states have (on average 290.42857142857144) internal successors, (2033), 7 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:58,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:58,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 736 [2023-09-01 12:01:58,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:58,563 INFO L130 PetriNetUnfolder]: 129/337 cut-off events. [2023-09-01 12:01:58,563 INFO L131 PetriNetUnfolder]: For 4233/4233 co-relation queries the response was YES. [2023-09-01 12:01:58,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2202 conditions, 337 events. 129/337 cut-off events. For 4233/4233 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1625 event pairs, 27 based on Foata normal form. 2/338 useless extension candidates. Maximal degree in co-relation 2151. Up to 128 conditions per place. [2023-09-01 12:01:58,566 INFO L137 encePairwiseOnDemand]: 729/736 looper letters, 65 selfloop transitions, 34 changer transitions 9/108 dead transitions. [2023-09-01 12:01:58,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 108 transitions, 1624 flow [2023-09-01 12:01:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:01:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:01:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2061 transitions. [2023-09-01 12:01:58,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4000388198757764 [2023-09-01 12:01:58,568 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2061 transitions. [2023-09-01 12:01:58,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2061 transitions. [2023-09-01 12:01:58,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:58,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2061 transitions. [2023-09-01 12:01:58,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 294.42857142857144) internal successors, (2061), 7 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:58,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 736.0) internal successors, (5888), 8 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:58,574 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 736.0) internal successors, (5888), 8 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:58,574 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 1234 flow. Second operand 7 states and 2061 transitions. [2023-09-01 12:01:58,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 108 transitions, 1624 flow [2023-09-01 12:01:58,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 108 transitions, 1500 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-09-01 12:01:58,587 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 1209 flow [2023-09-01 12:01:58,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1209, PETRI_PLACES=100, PETRI_TRANSITIONS=85} [2023-09-01 12:01:58,587 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 73 predicate places. [2023-09-01 12:01:58,587 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 1209 flow [2023-09-01 12:01:58,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 290.42857142857144) internal successors, (2033), 7 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:58,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:58,588 INFO L208 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] [2023-09-01 12:01:58,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 12:01:58,588 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:58,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:58,589 INFO L85 PathProgramCache]: Analyzing trace with hash -75835145, now seen corresponding path program 2 times [2023-09-01 12:01:58,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:58,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564346935] [2023-09-01 12:01:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:58,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:59,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:59,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564346935] [2023-09-01 12:01:59,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564346935] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:59,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:59,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:01:59,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299505645] [2023-09-01 12:01:59,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:59,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:01:59,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:59,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:01:59,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:01:59,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 736 [2023-09-01 12:01:59,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 1209 flow. Second operand has 5 states, 5 states have (on average 300.8) internal successors, (1504), 5 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:59,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:59,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 736 [2023-09-01 12:01:59,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:59,271 INFO L130 PetriNetUnfolder]: 116/326 cut-off events. [2023-09-01 12:01:59,271 INFO L131 PetriNetUnfolder]: For 3199/3199 co-relation queries the response was YES. [2023-09-01 12:01:59,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2053 conditions, 326 events. 116/326 cut-off events. For 3199/3199 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1605 event pairs, 66 based on Foata normal form. 3/328 useless extension candidates. Maximal degree in co-relation 2005. Up to 248 conditions per place. [2023-09-01 12:01:59,274 INFO L137 encePairwiseOnDemand]: 731/736 looper letters, 58 selfloop transitions, 20 changer transitions 15/93 dead transitions. [2023-09-01 12:01:59,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 93 transitions, 1419 flow [2023-09-01 12:01:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:01:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:01:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1516 transitions. [2023-09-01 12:01:59,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41195652173913044 [2023-09-01 12:01:59,276 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1516 transitions. [2023-09-01 12:01:59,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1516 transitions. [2023-09-01 12:01:59,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:59,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1516 transitions. [2023-09-01 12:01:59,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 303.2) internal successors, (1516), 5 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:59,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 736.0) internal successors, (4416), 6 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:59,280 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 736.0) internal successors, (4416), 6 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:59,280 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 1209 flow. Second operand 5 states and 1516 transitions. [2023-09-01 12:01:59,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 93 transitions, 1419 flow [2023-09-01 12:01:59,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 93 transitions, 1404 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 12:01:59,291 INFO L231 Difference]: Finished difference. Result has 103 places, 76 transitions, 1090 flow [2023-09-01 12:01:59,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1090, PETRI_PLACES=103, PETRI_TRANSITIONS=76} [2023-09-01 12:01:59,292 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 76 predicate places. [2023-09-01 12:01:59,292 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 76 transitions, 1090 flow [2023-09-01 12:01:59,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 300.8) internal successors, (1504), 5 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:59,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:59,292 INFO L208 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] [2023-09-01 12:01:59,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 12:01:59,293 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:59,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:59,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1032254093, now seen corresponding path program 3 times [2023-09-01 12:01:59,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:59,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072304043] [2023-09-01 12:01:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:59,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:01:59,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:59,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072304043] [2023-09-01 12:01:59,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072304043] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:59,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:59,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:01:59,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310054326] [2023-09-01 12:01:59,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:59,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:01:59,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:59,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:01:59,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:01:59,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 736 [2023-09-01 12:01:59,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 76 transitions, 1090 flow. Second operand has 5 states, 5 states have (on average 300.8) internal successors, (1504), 5 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:59,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:59,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 736 [2023-09-01 12:01:59,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:00,052 INFO L130 PetriNetUnfolder]: 102/284 cut-off events. [2023-09-01 12:02:00,053 INFO L131 PetriNetUnfolder]: For 2940/2940 co-relation queries the response was YES. [2023-09-01 12:02:00,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1856 conditions, 284 events. 102/284 cut-off events. For 2940/2940 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1343 event pairs, 26 based on Foata normal form. 5/288 useless extension candidates. Maximal degree in co-relation 1819. Up to 115 conditions per place. [2023-09-01 12:02:00,055 INFO L137 encePairwiseOnDemand]: 732/736 looper letters, 38 selfloop transitions, 2 changer transitions 46/86 dead transitions. [2023-09-01 12:02:00,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 86 transitions, 1290 flow [2023-09-01 12:02:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:02:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:02:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1520 transitions. [2023-09-01 12:02:00,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2023-09-01 12:02:00,057 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1520 transitions. [2023-09-01 12:02:00,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1520 transitions. [2023-09-01 12:02:00,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:00,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1520 transitions. [2023-09-01 12:02:00,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:00,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 736.0) internal successors, (4416), 6 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:00,063 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 736.0) internal successors, (4416), 6 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:00,063 INFO L175 Difference]: Start difference. First operand has 103 places, 76 transitions, 1090 flow. Second operand 5 states and 1520 transitions. [2023-09-01 12:02:00,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 86 transitions, 1290 flow [2023-09-01 12:02:00,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 86 transitions, 1225 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-09-01 12:02:00,072 INFO L231 Difference]: Finished difference. Result has 99 places, 37 transitions, 343 flow [2023-09-01 12:02:00,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=99, PETRI_TRANSITIONS=37} [2023-09-01 12:02:00,073 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 72 predicate places. [2023-09-01 12:02:00,073 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 37 transitions, 343 flow [2023-09-01 12:02:00,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 300.8) internal successors, (1504), 5 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:00,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:02:00,073 INFO L208 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] [2023-09-01 12:02:00,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 12:02:00,073 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:02:00,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:02:00,074 INFO L85 PathProgramCache]: Analyzing trace with hash -461531297, now seen corresponding path program 4 times [2023-09-01 12:02:00,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:02:00,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252922763] [2023-09-01 12:02:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:02:00,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:02:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:02:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:02:00,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:02:00,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252922763] [2023-09-01 12:02:00,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252922763] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:02:00,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:02:00,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-09-01 12:02:00,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842692007] [2023-09-01 12:02:00,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:02:00,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 12:02:00,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:02:00,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 12:02:00,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:02:02,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-09-01 12:02:02,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 37 transitions, 343 flow. Second operand has 14 states, 14 states have (on average 275.7142857142857) internal successors, (3860), 14 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:02,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:02,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-09-01 12:02:02,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:02,367 INFO L130 PetriNetUnfolder]: 26/87 cut-off events. [2023-09-01 12:02:02,367 INFO L131 PetriNetUnfolder]: For 917/917 co-relation queries the response was YES. [2023-09-01 12:02:02,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 87 events. 26/87 cut-off events. For 917/917 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 209 event pairs, 6 based on Foata normal form. 1/87 useless extension candidates. Maximal degree in co-relation 469. Up to 26 conditions per place. [2023-09-01 12:02:02,368 INFO L137 encePairwiseOnDemand]: 727/736 looper letters, 30 selfloop transitions, 8 changer transitions 16/54 dead transitions. [2023-09-01 12:02:02,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 54 transitions, 551 flow [2023-09-01 12:02:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:02:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:02:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2511 transitions. [2023-09-01 12:02:02,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37907608695652173 [2023-09-01 12:02:02,371 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2511 transitions. [2023-09-01 12:02:02,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2511 transitions. [2023-09-01 12:02:02,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:02,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2511 transitions. [2023-09-01 12:02:02,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:02,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:02,377 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:02,377 INFO L175 Difference]: Start difference. First operand has 99 places, 37 transitions, 343 flow. Second operand 9 states and 2511 transitions. [2023-09-01 12:02:02,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 54 transitions, 551 flow [2023-09-01 12:02:02,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 347 flow, removed 27 selfloop flow, removed 39 redundant places. [2023-09-01 12:02:02,379 INFO L231 Difference]: Finished difference. Result has 57 places, 31 transitions, 166 flow [2023-09-01 12:02:02,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=166, PETRI_PLACES=57, PETRI_TRANSITIONS=31} [2023-09-01 12:02:02,379 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2023-09-01 12:02:02,379 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 31 transitions, 166 flow [2023-09-01 12:02:02,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.7142857142857) internal successors, (3860), 14 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:02,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:02:02,380 INFO L208 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] [2023-09-01 12:02:02,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 12:02:02,380 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:02:02,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:02:02,381 INFO L85 PathProgramCache]: Analyzing trace with hash 481613323, now seen corresponding path program 5 times [2023-09-01 12:02:02,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:02:02,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226739450] [2023-09-01 12:02:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:02:02,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:02:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:02:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:02:02,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:02:02,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226739450] [2023-09-01 12:02:02,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226739450] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:02:02,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:02:02,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 12:02:02,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616146758] [2023-09-01 12:02:02,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:02:02,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:02:02,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:02:02,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:02:02,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:02:03,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 736 [2023-09-01 12:02:03,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 31 transitions, 166 flow. Second operand has 13 states, 13 states have (on average 277.84615384615387) internal successors, (3612), 13 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:03,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:03,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 736 [2023-09-01 12:02:03,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:04,107 INFO L130 PetriNetUnfolder]: 9/46 cut-off events. [2023-09-01 12:02:04,107 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-09-01 12:02:04,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 46 events. 9/46 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 48 event pairs, 3 based on Foata normal form. 1/46 useless extension candidates. Maximal degree in co-relation 171. Up to 16 conditions per place. [2023-09-01 12:02:04,107 INFO L137 encePairwiseOnDemand]: 728/736 looper letters, 22 selfloop transitions, 6 changer transitions 10/38 dead transitions. [2023-09-01 12:02:04,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 38 transitions, 259 flow [2023-09-01 12:02:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:02:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:02:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2519 transitions. [2023-09-01 12:02:04,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38028381642512077 [2023-09-01 12:02:04,110 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2519 transitions. [2023-09-01 12:02:04,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2519 transitions. [2023-09-01 12:02:04,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:04,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2519 transitions. [2023-09-01 12:02:04,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 279.8888888888889) internal successors, (2519), 9 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:04,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:04,117 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:04,130 INFO L175 Difference]: Start difference. First operand has 57 places, 31 transitions, 166 flow. Second operand 9 states and 2519 transitions. [2023-09-01 12:02:04,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 38 transitions, 259 flow [2023-09-01 12:02:04,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 218 flow, removed 2 selfloop flow, removed 15 redundant places. [2023-09-01 12:02:04,131 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 121 flow [2023-09-01 12:02:04,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=121, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-09-01 12:02:04,132 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2023-09-01 12:02:04,132 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 121 flow [2023-09-01 12:02:04,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 277.84615384615387) internal successors, (3612), 13 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:04,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:02:04,133 INFO L208 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] [2023-09-01 12:02:04,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 12:02:04,133 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:02:04,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:02:04,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1200415825, now seen corresponding path program 6 times [2023-09-01 12:02:04,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:02:04,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528938707] [2023-09-01 12:02:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:02:04,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:02:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:02:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:02:04,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:02:04,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528938707] [2023-09-01 12:02:04,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528938707] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:02:04,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:02:04,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 12:02:04,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378185116] [2023-09-01 12:02:04,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:02:04,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:02:04,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:02:04,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:02:04,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:02:05,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 736 [2023-09-01 12:02:05,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 121 flow. Second operand has 9 states, 9 states have (on average 291.6666666666667) internal successors, (2625), 9 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:05,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:05,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 736 [2023-09-01 12:02:05,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:05,279 INFO L130 PetriNetUnfolder]: 7/33 cut-off events. [2023-09-01 12:02:05,279 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 12:02:05,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 33 events. 7/33 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 112. Up to 18 conditions per place. [2023-09-01 12:02:05,280 INFO L137 encePairwiseOnDemand]: 731/736 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-09-01 12:02:05,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 30 transitions, 184 flow [2023-09-01 12:02:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:02:05,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:02:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1761 transitions. [2023-09-01 12:02:05,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39877717391304346 [2023-09-01 12:02:05,282 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1761 transitions. [2023-09-01 12:02:05,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1761 transitions. [2023-09-01 12:02:05,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:05,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1761 transitions. [2023-09-01 12:02:05,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 293.5) internal successors, (1761), 6 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:05,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 736.0) internal successors, (5152), 7 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:05,287 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 736.0) internal successors, (5152), 7 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:05,287 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 121 flow. Second operand 6 states and 1761 transitions. [2023-09-01 12:02:05,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 30 transitions, 184 flow [2023-09-01 12:02:05,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 158 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-09-01 12:02:05,287 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-09-01 12:02:05,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-09-01 12:02:05,288 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 13 predicate places. [2023-09-01 12:02:05,288 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-09-01 12:02:05,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 291.6666666666667) internal successors, (2625), 9 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:05,290 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-09-01 12:02:05,290 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-09-01 12:02:05,290 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-09-01 12:02:05,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 12:02:05,290 INFO L445 BasicCegarLoop]: Path program histogram: [12, 6, 1, 1, 1, 1] [2023-09-01 12:02:05,292 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 12:02:05,292 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 12:02:05,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 12:02:05 BasicIcfg [2023-09-01 12:02:05,294 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 12:02:05,294 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 12:02:05,295 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 12:02:05,295 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 12:02:05,295 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:01:27" (3/4) ... [2023-09-01 12:02:05,297 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 12:02:05,300 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-09-01 12:02:05,301 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-09-01 12:02:05,304 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 35 nodes and edges [2023-09-01 12:02:05,305 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-09-01 12:02:05,305 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-09-01 12:02:05,305 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-09-01 12:02:05,356 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 12:02:05,356 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 12:02:05,357 INFO L158 Benchmark]: Toolchain (without parser) took 39223.64ms. Allocated memory was 73.4MB in the beginning and 715.1MB in the end (delta: 641.7MB). Free memory was 50.9MB in the beginning and 601.6MB in the end (delta: -550.6MB). Peak memory consumption was 91.8MB. Max. memory is 16.1GB. [2023-09-01 12:02:05,357 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 56.6MB. Free memory was 34.8MB in the beginning and 34.7MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 12:02:05,358 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.56ms. Allocated memory is still 73.4MB. Free memory was 50.7MB in the beginning and 38.0MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-09-01 12:02:05,358 INFO L158 Benchmark]: Boogie Procedure Inliner took 90.61ms. Allocated memory is still 73.4MB. Free memory was 38.0MB in the beginning and 52.8MB in the end (delta: -14.8MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2023-09-01 12:02:05,358 INFO L158 Benchmark]: Boogie Preprocessor took 33.88ms. Allocated memory is still 73.4MB. Free memory was 52.8MB in the beginning and 50.8MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 12:02:05,358 INFO L158 Benchmark]: RCFGBuilder took 539.55ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 45.9MB in the end (delta: 4.9MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. [2023-09-01 12:02:05,358 INFO L158 Benchmark]: TraceAbstraction took 38222.61ms. Allocated memory was 73.4MB in the beginning and 715.1MB in the end (delta: 641.7MB). Free memory was 44.9MB in the beginning and 605.8MB in the end (delta: -560.9MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. [2023-09-01 12:02:05,359 INFO L158 Benchmark]: Witness Printer took 61.74ms. Allocated memory is still 715.1MB. Free memory was 605.8MB in the beginning and 601.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-09-01 12:02:05,363 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 56.6MB. Free memory was 34.8MB in the beginning and 34.7MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 267.56ms. Allocated memory is still 73.4MB. Free memory was 50.7MB in the beginning and 38.0MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 90.61ms. Allocated memory is still 73.4MB. Free memory was 38.0MB in the beginning and 52.8MB in the end (delta: -14.8MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.88ms. Allocated memory is still 73.4MB. Free memory was 52.8MB in the beginning and 50.8MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 539.55ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 45.9MB in the end (delta: 4.9MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. * TraceAbstraction took 38222.61ms. Allocated memory was 73.4MB in the beginning and 715.1MB in the end (delta: 641.7MB). Free memory was 44.9MB in the beginning and 605.8MB in the end (delta: -560.9MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. * Witness Printer took 61.74ms. Allocated memory is still 715.1MB. Free memory was 605.8MB in the beginning and 601.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.2s, 312 PlacesBefore, 27 PlacesAfterwards, 333 TransitionsBefore, 25 TransitionsAfterwards, 6048 CoEnabledTransitionPairs, 8 FixpointIterations, 198 TrivialSequentialCompositions, 90 ConcurrentSequentialCompositions, 57 TrivialYvCompositions, 25 ConcurrentYvCompositions, 23 ChoiceCompositions, 393 TotalNumberOfCompositions, 6391 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5583, independent: 5482, independent conditional: 0, independent unconditional: 5482, dependent: 101, dependent conditional: 0, dependent unconditional: 101, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3489, independent: 3467, independent conditional: 0, independent unconditional: 3467, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5583, independent: 2015, independent conditional: 0, independent unconditional: 2015, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 3489, unknown conditional: 0, unknown unconditional: 3489] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 93]: 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, 408 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: 38.1s, OverallIterations: 22, TraceHistogramMax: 1, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 15.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8325 SdHoareTripleChecker+Valid, 11.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6645 mSDsluCounter, 11264 SdHoareTripleChecker+Invalid, 10.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10784 mSDsCounter, 176 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21656 IncrementalHoareTripleChecker+Invalid, 21832 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 176 mSolverCounterUnsat, 480 mSDtfsCounter, 21656 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 251 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1276occurred in iteration=14, InterpolantAutomatonStates: 159, 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, 0.9s SatisfiabilityAnalysisTime, 11.4s InterpolantComputationTime, 486 NumberOfCodeBlocks, 486 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 464 ConstructedInterpolants, 0 QuantifiedInterpolants, 8650 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 PerfectInterpolantSequences, 78/78 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! [2023-09-01 12:02:05,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE