./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/parallel-misc-4.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 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:56:20,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:56:20,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:56:20,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:56:20,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:56:20,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:56:20,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:56:20,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:56:20,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:56:20,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:56:20,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:56:20,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:56:20,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:56:20,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:56:20,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:56:20,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:56:20,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:56:20,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:56:20,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:56:20,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:56:20,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:56:20,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:56:20,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:56:20,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:56:20,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:56:20,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:56:20,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:56:20,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:56:20,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:56:20,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:56:20,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:56:20,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:56:20,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:56:20,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:56:20,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:56:20,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:56:20,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:56:20,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:56:20,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:56:20,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:56:20,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:56:20,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:56:20,419 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:56:20,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:56:20,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:56:20,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:56:20,421 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:56:20,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:56:20,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:56:20,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:56:20,422 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:56:20,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:56:20,423 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:56:20,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:56:20,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:56:20,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:56:20,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:56:20,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:56:20,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:56:20,424 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:56:20,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:56:20,424 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:56:20,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:56:20,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:56:20,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:56:20,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:56:20,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:56:20,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:56:20,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:56:20,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:56:20,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:56:20,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:56:20,425 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:56:20,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:56:20,426 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:56:20,426 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:56:20,426 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:56:20,426 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:56:20,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:56:20,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:56:20,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:56:20,685 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:56:20,685 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:56:20,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-08-31 01:56:21,675 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:56:21,836 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:56:21,836 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-08-31 01:56:21,841 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceb807062/4b2cdbfdf1274470a8c53a6e0a2f848e/FLAG4b3dc9d0b [2023-08-31 01:56:21,855 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceb807062/4b2cdbfdf1274470a8c53a6e0a2f848e [2023-08-31 01:56:21,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:56:21,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:56:21,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:56:21,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:56:21,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:56:21,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:56:21" (1/1) ... [2023-08-31 01:56:21,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@660b675b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:21, skipping insertion in model container [2023-08-31 01:56:21,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:56:21" (1/1) ... [2023-08-31 01:56:21,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:56:21,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:56:21,996 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/parallel-misc-4.wvr.c[2950,2963] [2023-08-31 01:56:22,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:56:22,008 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:56:22,035 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/parallel-misc-4.wvr.c[2950,2963] [2023-08-31 01:56:22,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:56:22,043 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 01:56:22,044 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 01:56:22,048 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:56:22,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22 WrapperNode [2023-08-31 01:56:22,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:56:22,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:56:22,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:56:22,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:56:22,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22" (1/1) ... [2023-08-31 01:56:22,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22" (1/1) ... [2023-08-31 01:56:22,090 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-08-31 01:56:22,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:56:22,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:56:22,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:56:22,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:56:22,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22" (1/1) ... [2023-08-31 01:56:22,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22" (1/1) ... [2023-08-31 01:56:22,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22" (1/1) ... [2023-08-31 01:56:22,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22" (1/1) ... [2023-08-31 01:56:22,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22" (1/1) ... [2023-08-31 01:56:22,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22" (1/1) ... [2023-08-31 01:56:22,121 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22" (1/1) ... [2023-08-31 01:56:22,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22" (1/1) ... [2023-08-31 01:56:22,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:56:22,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:56:22,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:56:22,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:56:22,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22" (1/1) ... [2023-08-31 01:56:22,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:56:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:22,145 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) [2023-08-31 01:56:22,151 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 [2023-08-31 01:56:22,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:56:22,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:56:22,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:56:22,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:56:22,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:56:22,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 01:56:22,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 01:56:22,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:56:22,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:56:22,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:56:22,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 01:56:22,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 01:56:22,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:56:22,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:56:22,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:56:22,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:56:22,174 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:56:22,233 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:56:22,234 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:56:22,367 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:56:22,385 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:56:22,385 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 01:56:22,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:56:22 BoogieIcfgContainer [2023-08-31 01:56:22,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:56:22,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:56:22,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:56:22,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:56:22,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:56:21" (1/3) ... [2023-08-31 01:56:22,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de12348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:56:22, skipping insertion in model container [2023-08-31 01:56:22,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:22" (2/3) ... [2023-08-31 01:56:22,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de12348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:56:22, skipping insertion in model container [2023-08-31 01:56:22,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:56:22" (3/3) ... [2023-08-31 01:56:22,392 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2023-08-31 01:56:22,397 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:56:22,402 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:56:22,402 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:56:22,402 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:56:22,486 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 01:56:22,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 103 transitions, 230 flow [2023-08-31 01:56:22,576 INFO L130 PetriNetUnfolder]: 7/100 cut-off events. [2023-08-31 01:56:22,576 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:56:22,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 7/100 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2023-08-31 01:56:22,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 103 transitions, 230 flow [2023-08-31 01:56:22,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 90 transitions, 198 flow [2023-08-31 01:56:22,585 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:56:22,591 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 90 transitions, 198 flow [2023-08-31 01:56:22,593 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 90 transitions, 198 flow [2023-08-31 01:56:22,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 90 transitions, 198 flow [2023-08-31 01:56:22,619 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2023-08-31 01:56:22,622 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:56:22,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 90 events. 7/90 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2023-08-31 01:56:22,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 1134 [2023-08-31 01:56:24,648 INFO L134 LiptonReduction]: Checked pairs total: 1280 [2023-08-31 01:56:24,648 INFO L136 LiptonReduction]: Total number of compositions: 73 [2023-08-31 01:56:24,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:56:24,676 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;@12968296, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:56:24,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 01:56:24,681 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2023-08-31 01:56:24,682 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:56:24,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:24,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:24,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:24,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:24,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1669197162, now seen corresponding path program 1 times [2023-08-31 01:56:24,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:24,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968433823] [2023-08-31 01:56:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:24,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:25,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:25,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968433823] [2023-08-31 01:56:25,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968433823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:25,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:25,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:56:25,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612999526] [2023-08-31 01:56:25,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:25,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:56:25,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:25,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:56:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:56:25,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 176 [2023-08-31 01:56:25,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:25,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:25,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 176 [2023-08-31 01:56:25,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:25,499 INFO L130 PetriNetUnfolder]: 416/658 cut-off events. [2023-08-31 01:56:25,499 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-31 01:56:25,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 658 events. 416/658 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2588 event pairs, 65 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 1127. Up to 373 conditions per place. [2023-08-31 01:56:25,504 INFO L137 encePairwiseOnDemand]: 169/176 looper letters, 52 selfloop transitions, 5 changer transitions 19/77 dead transitions. [2023-08-31 01:56:25,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 77 transitions, 360 flow [2023-08-31 01:56:25,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:56:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:56:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 645 transitions. [2023-08-31 01:56:25,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523538961038961 [2023-08-31 01:56:25,565 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 645 transitions. [2023-08-31 01:56:25,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 645 transitions. [2023-08-31 01:56:25,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:25,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 645 transitions. [2023-08-31 01:56:25,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.14285714285714) internal successors, (645), 7 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:25,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 176.0) internal successors, (1408), 8 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:25,577 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 176.0) internal successors, (1408), 8 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:25,579 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 645 transitions. [2023-08-31 01:56:25,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 77 transitions, 360 flow [2023-08-31 01:56:25,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 77 transitions, 324 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 01:56:25,583 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2023-08-31 01:56:25,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-31 01:56:25,587 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-31 01:56:25,587 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2023-08-31 01:56:25,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:25,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:25,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:25,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:56:25,588 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:25,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:25,589 INFO L85 PathProgramCache]: Analyzing trace with hash -925139408, now seen corresponding path program 2 times [2023-08-31 01:56:25,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:25,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766389297] [2023-08-31 01:56:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:25,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:25,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:25,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766389297] [2023-08-31 01:56:25,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766389297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:25,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:25,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:56:25,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136915199] [2023-08-31 01:56:25,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:25,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:56:25,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:25,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:56:25,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:56:25,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 176 [2023-08-31 01:56:25,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:25,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:25,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 176 [2023-08-31 01:56:25,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:25,962 INFO L130 PetriNetUnfolder]: 268/444 cut-off events. [2023-08-31 01:56:25,963 INFO L131 PetriNetUnfolder]: For 557/573 co-relation queries the response was YES. [2023-08-31 01:56:25,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1416 conditions, 444 events. 268/444 cut-off events. For 557/573 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1669 event pairs, 18 based on Foata normal form. 28/462 useless extension candidates. Maximal degree in co-relation 919. Up to 249 conditions per place. [2023-08-31 01:56:25,965 INFO L137 encePairwiseOnDemand]: 172/176 looper letters, 37 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-08-31 01:56:25,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 262 flow [2023-08-31 01:56:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:56:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:56:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 378 transitions. [2023-08-31 01:56:25,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369318181818182 [2023-08-31 01:56:25,967 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 378 transitions. [2023-08-31 01:56:25,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 378 transitions. [2023-08-31 01:56:25,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:25,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 378 transitions. [2023-08-31 01:56:25,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:25,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:25,970 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:25,970 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 378 transitions. [2023-08-31 01:56:25,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 262 flow [2023-08-31 01:56:25,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 247 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 01:56:25,972 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2023-08-31 01:56:25,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=124, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-31 01:56:25,973 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-31 01:56:25,973 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2023-08-31 01:56:25,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:25,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:25,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:25,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 01:56:25,974 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:25,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:25,974 INFO L85 PathProgramCache]: Analyzing trace with hash -377288482, now seen corresponding path program 3 times [2023-08-31 01:56:25,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:25,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654644175] [2023-08-31 01:56:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:25,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:26,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:26,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654644175] [2023-08-31 01:56:26,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654644175] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:26,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:26,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:56:26,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774851200] [2023-08-31 01:56:26,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:26,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:56:26,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:56:26,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:56:26,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 176 [2023-08-31 01:56:26,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:26,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 176 [2023-08-31 01:56:26,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:26,294 INFO L130 PetriNetUnfolder]: 199/353 cut-off events. [2023-08-31 01:56:26,294 INFO L131 PetriNetUnfolder]: For 413/430 co-relation queries the response was YES. [2023-08-31 01:56:26,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 353 events. 199/353 cut-off events. For 413/430 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1231 event pairs, 32 based on Foata normal form. 33/386 useless extension candidates. Maximal degree in co-relation 1025. Up to 221 conditions per place. [2023-08-31 01:56:26,296 INFO L137 encePairwiseOnDemand]: 172/176 looper letters, 33 selfloop transitions, 7 changer transitions 2/44 dead transitions. [2023-08-31 01:56:26,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 281 flow [2023-08-31 01:56:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:56:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:56:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 374 transitions. [2023-08-31 01:56:26,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-08-31 01:56:26,297 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 374 transitions. [2023-08-31 01:56:26,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 374 transitions. [2023-08-31 01:56:26,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:26,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 374 transitions. [2023-08-31 01:56:26,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,300 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,300 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 4 states and 374 transitions. [2023-08-31 01:56:26,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 281 flow [2023-08-31 01:56:26,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:56:26,302 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 156 flow [2023-08-31 01:56:26,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-08-31 01:56:26,303 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2023-08-31 01:56:26,303 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 156 flow [2023-08-31 01:56:26,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:26,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:26,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 01:56:26,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:26,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash -762312740, now seen corresponding path program 4 times [2023-08-31 01:56:26,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:26,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572400731] [2023-08-31 01:56:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:26,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:26,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:26,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572400731] [2023-08-31 01:56:26,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572400731] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:26,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:26,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:56:26,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941352378] [2023-08-31 01:56:26,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:26,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:56:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:56:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:56:26,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 176 [2023-08-31 01:56:26,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:26,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 176 [2023-08-31 01:56:26,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:26,576 INFO L130 PetriNetUnfolder]: 209/361 cut-off events. [2023-08-31 01:56:26,576 INFO L131 PetriNetUnfolder]: For 616/642 co-relation queries the response was YES. [2023-08-31 01:56:26,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 361 events. 209/361 cut-off events. For 616/642 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1215 event pairs, 22 based on Foata normal form. 26/383 useless extension candidates. Maximal degree in co-relation 1078. Up to 146 conditions per place. [2023-08-31 01:56:26,578 INFO L137 encePairwiseOnDemand]: 170/176 looper letters, 38 selfloop transitions, 10 changer transitions 0/50 dead transitions. [2023-08-31 01:56:26,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 338 flow [2023-08-31 01:56:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:56:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:56:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 461 transitions. [2023-08-31 01:56:26,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238636363636363 [2023-08-31 01:56:26,580 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 461 transitions. [2023-08-31 01:56:26,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 461 transitions. [2023-08-31 01:56:26,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:26,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 461 transitions. [2023-08-31 01:56:26,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,594 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,595 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 156 flow. Second operand 5 states and 461 transitions. [2023-08-31 01:56:26,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 338 flow [2023-08-31 01:56:26,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 328 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 01:56:26,597 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 202 flow [2023-08-31 01:56:26,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-31 01:56:26,597 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-08-31 01:56:26,598 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 202 flow [2023-08-31 01:56:26,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:26,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:26,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 01:56:26,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:26,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:26,599 INFO L85 PathProgramCache]: Analyzing trace with hash 366060416, now seen corresponding path program 5 times [2023-08-31 01:56:26,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:26,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563718522] [2023-08-31 01:56:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:26,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:26,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563718522] [2023-08-31 01:56:26,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563718522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:26,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:26,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:56:26,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782614729] [2023-08-31 01:56:26,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:26,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:56:26,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:26,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:56:26,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:56:26,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 176 [2023-08-31 01:56:26,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:26,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 176 [2023-08-31 01:56:26,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:26,816 INFO L130 PetriNetUnfolder]: 199/330 cut-off events. [2023-08-31 01:56:26,816 INFO L131 PetriNetUnfolder]: For 1001/1029 co-relation queries the response was YES. [2023-08-31 01:56:26,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1300 conditions, 330 events. 199/330 cut-off events. For 1001/1029 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1058 event pairs, 15 based on Foata normal form. 25/349 useless extension candidates. Maximal degree in co-relation 898. Up to 240 conditions per place. [2023-08-31 01:56:26,818 INFO L137 encePairwiseOnDemand]: 169/176 looper letters, 31 selfloop transitions, 3 changer transitions 18/54 dead transitions. [2023-08-31 01:56:26,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 402 flow [2023-08-31 01:56:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:56:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:56:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2023-08-31 01:56:26,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4991883116883117 [2023-08-31 01:56:26,820 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2023-08-31 01:56:26,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2023-08-31 01:56:26,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:26,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2023-08-31 01:56:26,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 176.0) internal successors, (1408), 8 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,823 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 176.0) internal successors, (1408), 8 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,823 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 202 flow. Second operand 7 states and 615 transitions. [2023-08-31 01:56:26,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 402 flow [2023-08-31 01:56:26,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 01:56:26,825 INFO L231 Difference]: Finished difference. Result has 52 places, 30 transitions, 168 flow [2023-08-31 01:56:26,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=30} [2023-08-31 01:56:26,826 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2023-08-31 01:56:26,826 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 30 transitions, 168 flow [2023-08-31 01:56:26,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:26,827 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] [2023-08-31 01:56:26,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 01:56:26,827 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:26,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:26,827 INFO L85 PathProgramCache]: Analyzing trace with hash 156642809, now seen corresponding path program 1 times [2023-08-31 01:56:26,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:26,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394071186] [2023-08-31 01:56:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:26,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:26,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:26,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394071186] [2023-08-31 01:56:26,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394071186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:26,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:26,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:56:26,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221197053] [2023-08-31 01:56:26,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:26,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:56:26,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:26,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:56:26,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:56:26,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 176 [2023-08-31 01:56:26,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 30 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:26,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:26,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 176 [2023-08-31 01:56:26,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:27,140 INFO L130 PetriNetUnfolder]: 335/554 cut-off events. [2023-08-31 01:56:27,140 INFO L131 PetriNetUnfolder]: For 1326/1326 co-relation queries the response was YES. [2023-08-31 01:56:27,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 554 events. 335/554 cut-off events. For 1326/1326 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1992 event pairs, 14 based on Foata normal form. 16/570 useless extension candidates. Maximal degree in co-relation 2112. Up to 191 conditions per place. [2023-08-31 01:56:27,143 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 76 selfloop transitions, 34 changer transitions 0/110 dead transitions. [2023-08-31 01:56:27,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 110 transitions, 835 flow [2023-08-31 01:56:27,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:56:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:56:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 825 transitions. [2023-08-31 01:56:27,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-08-31 01:56:27,145 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 825 transitions. [2023-08-31 01:56:27,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 825 transitions. [2023-08-31 01:56:27,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:27,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 825 transitions. [2023-08-31 01:56:27,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.66666666666667) internal successors, (825), 9 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,149 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,149 INFO L175 Difference]: Start difference. First operand has 52 places, 30 transitions, 168 flow. Second operand 9 states and 825 transitions. [2023-08-31 01:56:27,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 110 transitions, 835 flow [2023-08-31 01:56:27,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 110 transitions, 779 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-08-31 01:56:27,153 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 507 flow [2023-08-31 01:56:27,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=507, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-31 01:56:27,154 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2023-08-31 01:56:27,154 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 507 flow [2023-08-31 01:56:27,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:27,154 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] [2023-08-31 01:56:27,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 01:56:27,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:27,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:27,155 INFO L85 PathProgramCache]: Analyzing trace with hash -960778785, now seen corresponding path program 2 times [2023-08-31 01:56:27,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:27,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584765367] [2023-08-31 01:56:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:27,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:27,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:27,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584765367] [2023-08-31 01:56:27,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584765367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:27,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:27,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:56:27,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183801398] [2023-08-31 01:56:27,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:27,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:56:27,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:27,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:56:27,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:56:27,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 176 [2023-08-31 01:56:27,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 507 flow. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:27,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 176 [2023-08-31 01:56:27,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:27,548 INFO L130 PetriNetUnfolder]: 483/856 cut-off events. [2023-08-31 01:56:27,548 INFO L131 PetriNetUnfolder]: For 5283/5283 co-relation queries the response was YES. [2023-08-31 01:56:27,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4418 conditions, 856 events. 483/856 cut-off events. For 5283/5283 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3629 event pairs, 39 based on Foata normal form. 20/876 useless extension candidates. Maximal degree in co-relation 3390. Up to 303 conditions per place. [2023-08-31 01:56:27,553 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 98 selfloop transitions, 61 changer transitions 0/159 dead transitions. [2023-08-31 01:56:27,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 159 transitions, 1568 flow [2023-08-31 01:56:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:56:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:56:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 823 transitions. [2023-08-31 01:56:27,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195707070707071 [2023-08-31 01:56:27,555 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 823 transitions. [2023-08-31 01:56:27,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 823 transitions. [2023-08-31 01:56:27,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:27,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 823 transitions. [2023-08-31 01:56:27,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.44444444444444) internal successors, (823), 9 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,559 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,559 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 507 flow. Second operand 9 states and 823 transitions. [2023-08-31 01:56:27,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 159 transitions, 1568 flow [2023-08-31 01:56:27,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 159 transitions, 1550 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-31 01:56:27,570 INFO L231 Difference]: Finished difference. Result has 71 places, 99 transitions, 1193 flow [2023-08-31 01:56:27,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1193, PETRI_PLACES=71, PETRI_TRANSITIONS=99} [2023-08-31 01:56:27,571 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2023-08-31 01:56:27,571 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 99 transitions, 1193 flow [2023-08-31 01:56:27,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:27,572 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] [2023-08-31 01:56:27,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 01:56:27,572 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:27,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:27,573 INFO L85 PathProgramCache]: Analyzing trace with hash -602311999, now seen corresponding path program 3 times [2023-08-31 01:56:27,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:27,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277574931] [2023-08-31 01:56:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:27,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:27,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:27,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277574931] [2023-08-31 01:56:27,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277574931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:27,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:27,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:56:27,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811190384] [2023-08-31 01:56:27,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:27,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:56:27,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:27,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:56:27,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:56:27,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 176 [2023-08-31 01:56:27,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 99 transitions, 1193 flow. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:27,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 176 [2023-08-31 01:56:27,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:27,856 INFO L130 PetriNetUnfolder]: 568/983 cut-off events. [2023-08-31 01:56:27,857 INFO L131 PetriNetUnfolder]: For 11208/11208 co-relation queries the response was YES. [2023-08-31 01:56:27,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6248 conditions, 983 events. 568/983 cut-off events. For 11208/11208 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4232 event pairs, 8 based on Foata normal form. 40/1023 useless extension candidates. Maximal degree in co-relation 5213. Up to 472 conditions per place. [2023-08-31 01:56:27,862 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 97 selfloop transitions, 42 changer transitions 35/174 dead transitions. [2023-08-31 01:56:27,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 174 transitions, 2309 flow [2023-08-31 01:56:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:56:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:56:27,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 799 transitions. [2023-08-31 01:56:27,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044191919191919 [2023-08-31 01:56:27,864 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 799 transitions. [2023-08-31 01:56:27,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 799 transitions. [2023-08-31 01:56:27,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:27,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 799 transitions. [2023-08-31 01:56:27,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 88.77777777777777) internal successors, (799), 9 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,894 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,894 INFO L175 Difference]: Start difference. First operand has 71 places, 99 transitions, 1193 flow. Second operand 9 states and 799 transitions. [2023-08-31 01:56:27,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 174 transitions, 2309 flow [2023-08-31 01:56:27,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 174 transitions, 2191 flow, removed 59 selfloop flow, removed 0 redundant places. [2023-08-31 01:56:27,926 INFO L231 Difference]: Finished difference. Result has 85 places, 104 transitions, 1387 flow [2023-08-31 01:56:27,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1387, PETRI_PLACES=85, PETRI_TRANSITIONS=104} [2023-08-31 01:56:27,933 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2023-08-31 01:56:27,933 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 104 transitions, 1387 flow [2023-08-31 01:56:27,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:27,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:27,934 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] [2023-08-31 01:56:27,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 01:56:27,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:27,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:27,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2082278653, now seen corresponding path program 4 times [2023-08-31 01:56:27,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:27,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944263864] [2023-08-31 01:56:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:27,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:28,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:28,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944263864] [2023-08-31 01:56:28,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944263864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:28,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:28,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 01:56:28,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802959029] [2023-08-31 01:56:28,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:28,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:56:28,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:28,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:56:28,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:56:28,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 176 [2023-08-31 01:56:28,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 104 transitions, 1387 flow. Second operand has 7 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:28,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:28,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 176 [2023-08-31 01:56:28,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:28,637 INFO L130 PetriNetUnfolder]: 505/924 cut-off events. [2023-08-31 01:56:28,637 INFO L131 PetriNetUnfolder]: For 11746/11782 co-relation queries the response was YES. [2023-08-31 01:56:28,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6076 conditions, 924 events. 505/924 cut-off events. For 11746/11782 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4282 event pairs, 30 based on Foata normal form. 30/947 useless extension candidates. Maximal degree in co-relation 4837. Up to 642 conditions per place. [2023-08-31 01:56:28,643 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 102 selfloop transitions, 13 changer transitions 60/182 dead transitions. [2023-08-31 01:56:28,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 182 transitions, 2663 flow [2023-08-31 01:56:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:56:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:56:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 840 transitions. [2023-08-31 01:56:28,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2023-08-31 01:56:28,646 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 840 transitions. [2023-08-31 01:56:28,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 840 transitions. [2023-08-31 01:56:28,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:28,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 840 transitions. [2023-08-31 01:56:28,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:28,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 176.0) internal successors, (1936), 11 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:28,649 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 176.0) internal successors, (1936), 11 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:28,649 INFO L175 Difference]: Start difference. First operand has 85 places, 104 transitions, 1387 flow. Second operand 10 states and 840 transitions. [2023-08-31 01:56:28,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 182 transitions, 2663 flow [2023-08-31 01:56:28,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 182 transitions, 2565 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-08-31 01:56:28,676 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 1505 flow [2023-08-31 01:56:28,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1505, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2023-08-31 01:56:28,677 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2023-08-31 01:56:28,677 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 1505 flow [2023-08-31 01:56:28,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:28,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:28,678 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] [2023-08-31 01:56:28,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 01:56:28,678 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:28,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1139668964, now seen corresponding path program 1 times [2023-08-31 01:56:28,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:28,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884282961] [2023-08-31 01:56:28,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:28,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:28,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:28,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884282961] [2023-08-31 01:56:28,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884282961] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:28,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:28,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:56:28,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571462970] [2023-08-31 01:56:28,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:28,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:56:28,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:56:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:56:28,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 176 [2023-08-31 01:56:28,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 1505 flow. Second operand has 6 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:28,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:28,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 176 [2023-08-31 01:56:28,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:29,105 INFO L130 PetriNetUnfolder]: 569/1016 cut-off events. [2023-08-31 01:56:29,106 INFO L131 PetriNetUnfolder]: For 13840/13853 co-relation queries the response was YES. [2023-08-31 01:56:29,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7253 conditions, 1016 events. 569/1016 cut-off events. For 13840/13853 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4581 event pairs, 31 based on Foata normal form. 55/1069 useless extension candidates. Maximal degree in co-relation 6035. Up to 681 conditions per place. [2023-08-31 01:56:29,113 INFO L137 encePairwiseOnDemand]: 169/176 looper letters, 112 selfloop transitions, 13 changer transitions 63/193 dead transitions. [2023-08-31 01:56:29,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 193 transitions, 3064 flow [2023-08-31 01:56:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:56:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:56:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 679 transitions. [2023-08-31 01:56:29,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4822443181818182 [2023-08-31 01:56:29,115 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 679 transitions. [2023-08-31 01:56:29,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 679 transitions. [2023-08-31 01:56:29,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:29,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 679 transitions. [2023-08-31 01:56:29,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 84.875) internal successors, (679), 8 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:29,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 176.0) internal successors, (1584), 9 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:29,118 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 176.0) internal successors, (1584), 9 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:29,118 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 1505 flow. Second operand 8 states and 679 transitions. [2023-08-31 01:56:29,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 193 transitions, 3064 flow [2023-08-31 01:56:29,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 193 transitions, 2893 flow, removed 44 selfloop flow, removed 6 redundant places. [2023-08-31 01:56:29,158 INFO L231 Difference]: Finished difference. Result has 96 places, 116 transitions, 1613 flow [2023-08-31 01:56:29,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1613, PETRI_PLACES=96, PETRI_TRANSITIONS=116} [2023-08-31 01:56:29,160 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2023-08-31 01:56:29,160 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 116 transitions, 1613 flow [2023-08-31 01:56:29,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:29,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:29,160 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:29,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 01:56:29,160 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:29,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash -696084226, now seen corresponding path program 5 times [2023-08-31 01:56:29,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:29,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586433210] [2023-08-31 01:56:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:29,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:29,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:29,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586433210] [2023-08-31 01:56:29,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586433210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:29,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712487165] [2023-08-31 01:56:29,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:56:29,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:29,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:29,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:29,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 01:56:29,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:56:29,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:56:29,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 01:56:29,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:29,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:30,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712487165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:30,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:30,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-31 01:56:30,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677700472] [2023-08-31 01:56:30,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:30,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:56:30,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:30,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:56:30,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:56:30,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 176 [2023-08-31 01:56:30,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 116 transitions, 1613 flow. Second operand has 17 states, 17 states have (on average 77.3529411764706) internal successors, (1315), 17 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:30,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:30,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 176 [2023-08-31 01:56:30,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:31,492 INFO L130 PetriNetUnfolder]: 1087/1933 cut-off events. [2023-08-31 01:56:31,493 INFO L131 PetriNetUnfolder]: For 29181/29185 co-relation queries the response was YES. [2023-08-31 01:56:31,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13616 conditions, 1933 events. 1087/1933 cut-off events. For 29181/29185 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10236 event pairs, 14 based on Foata normal form. 84/2016 useless extension candidates. Maximal degree in co-relation 11291. Up to 611 conditions per place. [2023-08-31 01:56:31,505 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 149 selfloop transitions, 119 changer transitions 213/488 dead transitions. [2023-08-31 01:56:31,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 488 transitions, 7190 flow [2023-08-31 01:56:31,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-31 01:56:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-31 01:56:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3246 transitions. [2023-08-31 01:56:31,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46107954545454544 [2023-08-31 01:56:31,526 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3246 transitions. [2023-08-31 01:56:31,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3246 transitions. [2023-08-31 01:56:31,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:31,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3246 transitions. [2023-08-31 01:56:31,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 81.15) internal successors, (3246), 40 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:31,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 176.0) internal successors, (7216), 41 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:31,539 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 176.0) internal successors, (7216), 41 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:31,539 INFO L175 Difference]: Start difference. First operand has 96 places, 116 transitions, 1613 flow. Second operand 40 states and 3246 transitions. [2023-08-31 01:56:31,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 488 transitions, 7190 flow [2023-08-31 01:56:31,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 488 transitions, 6883 flow, removed 145 selfloop flow, removed 5 redundant places. [2023-08-31 01:56:31,599 INFO L231 Difference]: Finished difference. Result has 143 places, 196 transitions, 3320 flow [2023-08-31 01:56:31,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3320, PETRI_PLACES=143, PETRI_TRANSITIONS=196} [2023-08-31 01:56:31,600 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2023-08-31 01:56:31,600 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 196 transitions, 3320 flow [2023-08-31 01:56:31,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 77.3529411764706) internal successors, (1315), 17 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:31,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:31,601 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] [2023-08-31 01:56:31,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 01:56:31,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-31 01:56:31,809 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:31,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1935321177, now seen corresponding path program 1 times [2023-08-31 01:56:31,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:31,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502512598] [2023-08-31 01:56:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:31,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:32,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:32,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502512598] [2023-08-31 01:56:32,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502512598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:32,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488683323] [2023-08-31 01:56:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:32,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:32,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:32,166 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:32,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 01:56:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:32,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 01:56:32,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:32,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:32,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488683323] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:32,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:32,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-08-31 01:56:32,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553513372] [2023-08-31 01:56:32,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:32,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:56:32,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:32,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:56:32,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:56:32,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-08-31 01:56:32,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 196 transitions, 3320 flow. Second operand has 17 states, 17 states have (on average 72.88235294117646) internal successors, (1239), 17 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:32,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:32,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-08-31 01:56:32,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:34,343 INFO L130 PetriNetUnfolder]: 1556/2676 cut-off events. [2023-08-31 01:56:34,343 INFO L131 PetriNetUnfolder]: For 54921/54931 co-relation queries the response was YES. [2023-08-31 01:56:34,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21250 conditions, 2676 events. 1556/2676 cut-off events. For 54921/54931 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14609 event pairs, 30 based on Foata normal form. 84/2759 useless extension candidates. Maximal degree in co-relation 19355. Up to 841 conditions per place. [2023-08-31 01:56:34,372 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 229 selfloop transitions, 159 changer transitions 218/613 dead transitions. [2023-08-31 01:56:34,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 613 transitions, 10255 flow [2023-08-31 01:56:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-31 01:56:34,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-31 01:56:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3371 transitions. [2023-08-31 01:56:34,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353047520661157 [2023-08-31 01:56:34,377 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3371 transitions. [2023-08-31 01:56:34,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3371 transitions. [2023-08-31 01:56:34,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:34,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3371 transitions. [2023-08-31 01:56:34,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 76.61363636363636) internal successors, (3371), 44 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:34,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:34,391 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:34,391 INFO L175 Difference]: Start difference. First operand has 143 places, 196 transitions, 3320 flow. Second operand 44 states and 3371 transitions. [2023-08-31 01:56:34,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 613 transitions, 10255 flow [2023-08-31 01:56:34,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 613 transitions, 8567 flow, removed 787 selfloop flow, removed 14 redundant places. [2023-08-31 01:56:34,642 INFO L231 Difference]: Finished difference. Result has 184 places, 293 transitions, 4540 flow [2023-08-31 01:56:34,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4540, PETRI_PLACES=184, PETRI_TRANSITIONS=293} [2023-08-31 01:56:34,644 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2023-08-31 01:56:34,644 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 293 transitions, 4540 flow [2023-08-31 01:56:34,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 72.88235294117646) internal successors, (1239), 17 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:34,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:34,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:34,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 01:56:34,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-31 01:56:34,869 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:34,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:34,870 INFO L85 PathProgramCache]: Analyzing trace with hash 641822062, now seen corresponding path program 2 times [2023-08-31 01:56:34,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:34,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221366973] [2023-08-31 01:56:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:34,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:35,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:35,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221366973] [2023-08-31 01:56:35,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221366973] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:35,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113971258] [2023-08-31 01:56:35,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:56:35,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:35,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:35,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:35,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 01:56:35,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:56:35,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:56:35,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 01:56:35,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:35,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:35,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113971258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:35,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:35,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2023-08-31 01:56:35,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929801118] [2023-08-31 01:56:35,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:35,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 01:56:35,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:35,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 01:56:35,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-31 01:56:35,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 176 [2023-08-31 01:56:35,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 293 transitions, 4540 flow. Second operand has 16 states, 16 states have (on average 75.625) internal successors, (1210), 16 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:35,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:35,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 176 [2023-08-31 01:56:35,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:37,920 INFO L130 PetriNetUnfolder]: 1998/3373 cut-off events. [2023-08-31 01:56:37,920 INFO L131 PetriNetUnfolder]: For 58136/58136 co-relation queries the response was YES. [2023-08-31 01:56:37,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26150 conditions, 3373 events. 1998/3373 cut-off events. For 58136/58136 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18534 event pairs, 47 based on Foata normal form. 158/3531 useless extension candidates. Maximal degree in co-relation 25962. Up to 981 conditions per place. [2023-08-31 01:56:37,947 INFO L137 encePairwiseOnDemand]: 166/176 looper letters, 281 selfloop transitions, 201 changer transitions 246/728 dead transitions. [2023-08-31 01:56:37,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 728 transitions, 12477 flow [2023-08-31 01:56:37,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-31 01:56:37,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-31 01:56:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4720 transitions. [2023-08-31 01:56:37,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4396423248882265 [2023-08-31 01:56:37,953 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4720 transitions. [2023-08-31 01:56:37,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4720 transitions. [2023-08-31 01:56:37,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:37,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4720 transitions. [2023-08-31 01:56:37,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 77.37704918032787) internal successors, (4720), 61 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:37,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 176.0) internal successors, (10912), 62 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:37,969 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 176.0) internal successors, (10912), 62 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:37,969 INFO L175 Difference]: Start difference. First operand has 184 places, 293 transitions, 4540 flow. Second operand 61 states and 4720 transitions. [2023-08-31 01:56:37,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 728 transitions, 12477 flow [2023-08-31 01:56:38,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 728 transitions, 11330 flow, removed 562 selfloop flow, removed 25 redundant places. [2023-08-31 01:56:38,227 INFO L231 Difference]: Finished difference. Result has 239 places, 374 transitions, 6209 flow [2023-08-31 01:56:38,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=4058, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6209, PETRI_PLACES=239, PETRI_TRANSITIONS=374} [2023-08-31 01:56:38,228 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2023-08-31 01:56:38,228 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 374 transitions, 6209 flow [2023-08-31 01:56:38,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.625) internal successors, (1210), 16 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:38,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:38,229 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:38,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 01:56:38,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:38,434 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:38,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:38,434 INFO L85 PathProgramCache]: Analyzing trace with hash 216840545, now seen corresponding path program 2 times [2023-08-31 01:56:38,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:38,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678685789] [2023-08-31 01:56:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:38,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:38,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:38,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678685789] [2023-08-31 01:56:38,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678685789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:38,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152888567] [2023-08-31 01:56:38,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:56:38,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:38,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:38,870 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:38,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 01:56:38,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:56:38,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:56:38,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 01:56:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:39,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:39,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152888567] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:39,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:39,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-08-31 01:56:39,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383220671] [2023-08-31 01:56:39,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:39,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:56:39,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:39,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:56:39,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:56:39,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-08-31 01:56:39,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 374 transitions, 6209 flow. Second operand has 21 states, 21 states have (on average 72.52380952380952) internal successors, (1523), 21 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:39,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:39,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-08-31 01:56:39,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:41,920 INFO L130 PetriNetUnfolder]: 2590/4426 cut-off events. [2023-08-31 01:56:41,920 INFO L131 PetriNetUnfolder]: For 107915/107920 co-relation queries the response was YES. [2023-08-31 01:56:41,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36413 conditions, 4426 events. 2590/4426 cut-off events. For 107915/107920 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 25463 event pairs, 52 based on Foata normal form. 149/4575 useless extension candidates. Maximal degree in co-relation 35620. Up to 1319 conditions per place. [2023-08-31 01:56:41,961 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 305 selfloop transitions, 312 changer transitions 277/897 dead transitions. [2023-08-31 01:56:41,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 897 transitions, 16375 flow [2023-08-31 01:56:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-31 01:56:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-31 01:56:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4024 transitions. [2023-08-31 01:56:41,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43138936535162953 [2023-08-31 01:56:41,971 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4024 transitions. [2023-08-31 01:56:41,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4024 transitions. [2023-08-31 01:56:41,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:41,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4024 transitions. [2023-08-31 01:56:41,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 75.9245283018868) internal successors, (4024), 53 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:41,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 176.0) internal successors, (9504), 54 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:41,989 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 176.0) internal successors, (9504), 54 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:41,989 INFO L175 Difference]: Start difference. First operand has 239 places, 374 transitions, 6209 flow. Second operand 53 states and 4024 transitions. [2023-08-31 01:56:41,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 897 transitions, 16375 flow [2023-08-31 01:56:42,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 897 transitions, 13801 flow, removed 1035 selfloop flow, removed 41 redundant places. [2023-08-31 01:56:42,487 INFO L231 Difference]: Finished difference. Result has 235 places, 502 transitions, 8372 flow [2023-08-31 01:56:42,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=5397, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=8372, PETRI_PLACES=235, PETRI_TRANSITIONS=502} [2023-08-31 01:56:42,488 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2023-08-31 01:56:42,488 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 502 transitions, 8372 flow [2023-08-31 01:56:42,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 72.52380952380952) internal successors, (1523), 21 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:42,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:42,489 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:42,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 01:56:42,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:42,697 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:42,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1207528187, now seen corresponding path program 3 times [2023-08-31 01:56:42,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:42,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792495641] [2023-08-31 01:56:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:42,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:43,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:43,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792495641] [2023-08-31 01:56:43,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792495641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:43,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978090406] [2023-08-31 01:56:43,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:56:43,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:43,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:43,209 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:43,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 01:56:43,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 01:56:43,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:56:43,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 01:56:43,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:43,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:56:44,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978090406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:44,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:44,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-08-31 01:56:44,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409420674] [2023-08-31 01:56:44,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:44,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 01:56:44,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:44,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 01:56:44,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-08-31 01:56:44,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 176 [2023-08-31 01:56:44,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 502 transitions, 8372 flow. Second operand has 26 states, 26 states have (on average 68.53846153846153) internal successors, (1782), 26 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:44,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:44,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 176 [2023-08-31 01:56:44,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:47,459 INFO L130 PetriNetUnfolder]: 2615/4366 cut-off events. [2023-08-31 01:56:47,459 INFO L131 PetriNetUnfolder]: For 68799/68799 co-relation queries the response was YES. [2023-08-31 01:56:47,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34736 conditions, 4366 events. 2615/4366 cut-off events. For 68799/68799 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23947 event pairs, 59 based on Foata normal form. 96/4462 useless extension candidates. Maximal degree in co-relation 34519. Up to 1341 conditions per place. [2023-08-31 01:56:47,500 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 362 selfloop transitions, 375 changer transitions 177/914 dead transitions. [2023-08-31 01:56:47,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 914 transitions, 15700 flow [2023-08-31 01:56:47,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-31 01:56:47,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-31 01:56:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 5130 transitions. [2023-08-31 01:56:47,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40482954545454547 [2023-08-31 01:56:47,507 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 5130 transitions. [2023-08-31 01:56:47,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 5130 transitions. [2023-08-31 01:56:47,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:47,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 5130 transitions. [2023-08-31 01:56:47,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 71.25) internal successors, (5130), 72 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:47,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 176.0) internal successors, (12848), 73 states have internal predecessors, (12848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:47,529 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 176.0) internal successors, (12848), 73 states have internal predecessors, (12848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:47,529 INFO L175 Difference]: Start difference. First operand has 235 places, 502 transitions, 8372 flow. Second operand 72 states and 5130 transitions. [2023-08-31 01:56:47,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 914 transitions, 15700 flow [2023-08-31 01:56:48,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 914 transitions, 14440 flow, removed 495 selfloop flow, removed 29 redundant places. [2023-08-31 01:56:48,052 INFO L231 Difference]: Finished difference. Result has 284 places, 591 transitions, 10286 flow [2023-08-31 01:56:48,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=7661, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=10286, PETRI_PLACES=284, PETRI_TRANSITIONS=591} [2023-08-31 01:56:48,053 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2023-08-31 01:56:48,053 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 591 transitions, 10286 flow [2023-08-31 01:56:48,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 68.53846153846153) internal successors, (1782), 26 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:48,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:48,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:48,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 01:56:48,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 01:56:48,257 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:48,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:48,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1794503256, now seen corresponding path program 4 times [2023-08-31 01:56:48,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:48,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919813480] [2023-08-31 01:56:48,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:48,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:48,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:48,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919813480] [2023-08-31 01:56:48,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919813480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:48,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615790912] [2023-08-31 01:56:48,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:56:48,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:48,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:48,597 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:48,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 01:56:48,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:56:48,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:56:48,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 01:56:48,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:49,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:49,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615790912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:49,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:49,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 23 [2023-08-31 01:56:49,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962128152] [2023-08-31 01:56:49,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:49,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:56:49,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:49,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:56:49,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:56:49,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-08-31 01:56:49,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 591 transitions, 10286 flow. Second operand has 24 states, 24 states have (on average 72.45833333333333) internal successors, (1739), 24 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:49,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:49,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-08-31 01:56:49,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:53,628 INFO L130 PetriNetUnfolder]: 5091/8635 cut-off events. [2023-08-31 01:56:53,628 INFO L131 PetriNetUnfolder]: For 155622/155624 co-relation queries the response was YES. [2023-08-31 01:56:53,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74300 conditions, 8635 events. 5091/8635 cut-off events. For 155622/155624 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 56200 event pairs, 52 based on Foata normal form. 304/8937 useless extension candidates. Maximal degree in co-relation 73669. Up to 2583 conditions per place. [2023-08-31 01:56:53,706 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 397 selfloop transitions, 828 changer transitions 553/1788 dead transitions. [2023-08-31 01:56:53,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1788 transitions, 35094 flow [2023-08-31 01:56:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-08-31 01:56:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2023-08-31 01:56:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 7617 transitions. [2023-08-31 01:56:53,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428499099909991 [2023-08-31 01:56:53,714 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 7617 transitions. [2023-08-31 01:56:53,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 7617 transitions. [2023-08-31 01:56:53,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:53,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 7617 transitions. [2023-08-31 01:56:53,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 75.41584158415841) internal successors, (7617), 101 states have internal predecessors, (7617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:53,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 176.0) internal successors, (17952), 102 states have internal predecessors, (17952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:53,736 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 176.0) internal successors, (17952), 102 states have internal predecessors, (17952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:53,736 INFO L175 Difference]: Start difference. First operand has 284 places, 591 transitions, 10286 flow. Second operand 101 states and 7617 transitions. [2023-08-31 01:56:53,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1788 transitions, 35094 flow [2023-08-31 01:56:55,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1788 transitions, 32014 flow, removed 1300 selfloop flow, removed 38 redundant places. [2023-08-31 01:56:55,448 INFO L231 Difference]: Finished difference. Result has 361 places, 978 transitions, 18839 flow [2023-08-31 01:56:55,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=9186, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=18839, PETRI_PLACES=361, PETRI_TRANSITIONS=978} [2023-08-31 01:56:55,449 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 331 predicate places. [2023-08-31 01:56:55,449 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 978 transitions, 18839 flow [2023-08-31 01:56:55,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 72.45833333333333) internal successors, (1739), 24 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:55,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:55,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:55,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 01:56:55,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 01:56:55,655 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:55,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:55,655 INFO L85 PathProgramCache]: Analyzing trace with hash 917495554, now seen corresponding path program 5 times [2023-08-31 01:56:55,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:55,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450410077] [2023-08-31 01:56:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:55,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:56,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:56,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450410077] [2023-08-31 01:56:56,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450410077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:56,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601139708] [2023-08-31 01:56:56,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:56:56,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:56,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:56,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:56,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 01:56:56,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:56:56,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:56:56,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 01:56:56,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:56,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:56,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601139708] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:56,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:56,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-31 01:56:56,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734155376] [2023-08-31 01:56:56,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:56,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 01:56:56,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:56,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 01:56:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-08-31 01:56:56,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-08-31 01:56:56,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 978 transitions, 18839 flow. Second operand has 26 states, 26 states have (on average 72.26923076923077) internal successors, (1879), 26 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:56,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:56,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-08-31 01:56:56,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:57:06,102 INFO L130 PetriNetUnfolder]: 10634/18130 cut-off events. [2023-08-31 01:57:06,103 INFO L131 PetriNetUnfolder]: For 370831/370834 co-relation queries the response was YES. [2023-08-31 01:57:06,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164413 conditions, 18130 events. 10634/18130 cut-off events. For 370831/370834 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 132820 event pairs, 174 based on Foata normal form. 427/18557 useless extension candidates. Maximal degree in co-relation 164067. Up to 4993 conditions per place. [2023-08-31 01:57:06,332 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 854 selfloop transitions, 1788 changer transitions 551/3203 dead transitions. [2023-08-31 01:57:06,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 3203 transitions, 68031 flow [2023-08-31 01:57:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-08-31 01:57:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-08-31 01:57:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 9354 transitions. [2023-08-31 01:57:06,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4286107038123167 [2023-08-31 01:57:06,340 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 9354 transitions. [2023-08-31 01:57:06,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 9354 transitions. [2023-08-31 01:57:06,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:57:06,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 9354 transitions. [2023-08-31 01:57:06,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 75.43548387096774) internal successors, (9354), 124 states have internal predecessors, (9354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:06,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 176.0) internal successors, (22000), 125 states have internal predecessors, (22000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:06,362 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 176.0) internal successors, (22000), 125 states have internal predecessors, (22000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:06,362 INFO L175 Difference]: Start difference. First operand has 361 places, 978 transitions, 18839 flow. Second operand 124 states and 9354 transitions. [2023-08-31 01:57:06,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 3203 transitions, 68031 flow [2023-08-31 01:57:14,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 3203 transitions, 57701 flow, removed 4100 selfloop flow, removed 42 redundant places. [2023-08-31 01:57:14,249 INFO L231 Difference]: Finished difference. Result has 461 places, 2282 transitions, 45651 flow [2023-08-31 01:57:14,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=16379, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=686, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=45651, PETRI_PLACES=461, PETRI_TRANSITIONS=2282} [2023-08-31 01:57:14,250 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 431 predicate places. [2023-08-31 01:57:14,250 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 2282 transitions, 45651 flow [2023-08-31 01:57:14,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 72.26923076923077) internal successors, (1879), 26 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:14,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:57:14,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:57:14,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-31 01:57:14,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:14,462 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:57:14,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:57:14,462 INFO L85 PathProgramCache]: Analyzing trace with hash 734606202, now seen corresponding path program 6 times [2023-08-31 01:57:14,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:57:14,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019830164] [2023-08-31 01:57:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:57:14,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:57:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:14,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:57:14,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019830164] [2023-08-31 01:57:14,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019830164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:57:14,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227489842] [2023-08-31 01:57:14,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:57:14,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:57:14,873 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:57:14,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 01:57:14,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:57:14,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:57:14,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 01:57:14,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:57:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:15,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:57:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:15,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227489842] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:57:15,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:57:15,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-08-31 01:57:15,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872723731] [2023-08-31 01:57:15,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:57:15,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:57:15,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:57:15,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:57:15,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:57:15,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 176 [2023-08-31 01:57:15,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 2282 transitions, 45651 flow. Second operand has 25 states, 25 states have (on average 69.64) internal successors, (1741), 25 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:15,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:57:15,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 176 [2023-08-31 01:57:15,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:57:28,583 INFO L130 PetriNetUnfolder]: 12844/21841 cut-off events. [2023-08-31 01:57:28,583 INFO L131 PetriNetUnfolder]: For 392636/392636 co-relation queries the response was YES. [2023-08-31 01:57:28,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194036 conditions, 21841 events. 12844/21841 cut-off events. For 392636/392636 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 164585 event pairs, 321 based on Foata normal form. 448/22289 useless extension candidates. Maximal degree in co-relation 193843. Up to 8660 conditions per place. [2023-08-31 01:57:28,838 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 1884 selfloop transitions, 1274 changer transitions 528/3686 dead transitions. [2023-08-31 01:57:28,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 3686 transitions, 79623 flow [2023-08-31 01:57:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-08-31 01:57:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-08-31 01:57:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 6679 transitions. [2023-08-31 01:57:28,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41248764822134387 [2023-08-31 01:57:28,844 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 6679 transitions. [2023-08-31 01:57:28,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 6679 transitions. [2023-08-31 01:57:28,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:57:28,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 6679 transitions. [2023-08-31 01:57:28,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 72.59782608695652) internal successors, (6679), 92 states have internal predecessors, (6679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:28,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 176.0) internal successors, (16368), 93 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:28,860 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 176.0) internal successors, (16368), 93 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:28,861 INFO L175 Difference]: Start difference. First operand has 461 places, 2282 transitions, 45651 flow. Second operand 92 states and 6679 transitions. [2023-08-31 01:57:28,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 3686 transitions, 79623 flow [2023-08-31 01:57:44,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 3686 transitions, 76931 flow, removed 1270 selfloop flow, removed 49 redundant places. [2023-08-31 01:57:44,757 INFO L231 Difference]: Finished difference. Result has 523 places, 2890 transitions, 61182 flow [2023-08-31 01:57:44,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=43910, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=754, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=61182, PETRI_PLACES=523, PETRI_TRANSITIONS=2890} [2023-08-31 01:57:44,759 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 493 predicate places. [2023-08-31 01:57:44,759 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 2890 transitions, 61182 flow [2023-08-31 01:57:44,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 69.64) internal successors, (1741), 25 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:44,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:57:44,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:57:44,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 01:57:44,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 01:57:44,964 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:57:44,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:57:44,965 INFO L85 PathProgramCache]: Analyzing trace with hash 729794018, now seen corresponding path program 7 times [2023-08-31 01:57:44,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:57:44,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637047587] [2023-08-31 01:57:44,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:57:44,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:57:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:45,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:57:45,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637047587] [2023-08-31 01:57:45,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637047587] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:57:45,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724050581] [2023-08-31 01:57:45,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:57:45,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:45,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:57:45,433 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:57:45,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 01:57:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:45,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 01:57:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:57:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:45,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:57:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:46,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724050581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:57:46,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:57:46,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-08-31 01:57:46,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012216640] [2023-08-31 01:57:46,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:57:46,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 01:57:46,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:57:46,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 01:57:46,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-08-31 01:57:46,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 176 [2023-08-31 01:57:46,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 2890 transitions, 61182 flow. Second operand has 30 states, 30 states have (on average 67.9) internal successors, (2037), 30 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:46,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:57:46,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 176 [2023-08-31 01:57:46,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:58:10,604 INFO L130 PetriNetUnfolder]: 17137/29428 cut-off events. [2023-08-31 01:58:10,605 INFO L131 PetriNetUnfolder]: For 920114/920114 co-relation queries the response was YES. [2023-08-31 01:58:10,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288487 conditions, 29428 events. 17137/29428 cut-off events. For 920114/920114 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 235352 event pairs, 308 based on Foata normal form. 658/30086 useless extension candidates. Maximal degree in co-relation 288079. Up to 8172 conditions per place. [2023-08-31 01:58:11,023 INFO L137 encePairwiseOnDemand]: 166/176 looper letters, 1799 selfloop transitions, 2492 changer transitions 775/5066 dead transitions. [2023-08-31 01:58:11,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 5066 transitions, 115675 flow [2023-08-31 01:58:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2023-08-31 01:58:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2023-08-31 01:58:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 10729 transitions. [2023-08-31 01:58:11,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064015151515151 [2023-08-31 01:58:11,031 INFO L72 ComplementDD]: Start complementDD. Operand 150 states and 10729 transitions. [2023-08-31 01:58:11,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 10729 transitions. [2023-08-31 01:58:11,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:58:11,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 150 states and 10729 transitions. [2023-08-31 01:58:11,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 151 states, 150 states have (on average 71.52666666666667) internal successors, (10729), 150 states have internal predecessors, (10729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:11,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 151 states, 151 states have (on average 176.0) internal successors, (26576), 151 states have internal predecessors, (26576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:11,056 INFO L81 ComplementDD]: Finished complementDD. Result has 151 states, 151 states have (on average 176.0) internal successors, (26576), 151 states have internal predecessors, (26576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:11,056 INFO L175 Difference]: Start difference. First operand has 523 places, 2890 transitions, 61182 flow. Second operand 150 states and 10729 transitions. [2023-08-31 01:58:11,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 5066 transitions, 115675 flow [2023-08-31 01:58:41,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 5066 transitions, 112180 flow, removed 1701 selfloop flow, removed 45 redundant places. [2023-08-31 01:58:42,071 INFO L231 Difference]: Finished difference. Result has 677 places, 3881 transitions, 91180 flow [2023-08-31 01:58:42,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=59951, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1614, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=991, PETRI_DIFFERENCE_SUBTRAHEND_STATES=150, PETRI_FLOW=91180, PETRI_PLACES=677, PETRI_TRANSITIONS=3881} [2023-08-31 01:58:42,073 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 647 predicate places. [2023-08-31 01:58:42,073 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 3881 transitions, 91180 flow [2023-08-31 01:58:42,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 67.9) internal successors, (2037), 30 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:42,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:58:42,074 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:58:42,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 01:58:42,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:58:42,279 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:58:42,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:58:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2138623070, now seen corresponding path program 8 times [2023-08-31 01:58:42,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:58:42,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221342617] [2023-08-31 01:58:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:58:42,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:58:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:58:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:42,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:58:42,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221342617] [2023-08-31 01:58:42,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221342617] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:58:42,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62224506] [2023-08-31 01:58:42,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:58:42,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:58:42,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:58:42,707 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:58:42,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 01:58:42,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:58:42,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:58:42,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 01:58:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:58:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:43,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:58:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:43,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62224506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:58:43,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:58:43,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-31 01:58:43,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363570915] [2023-08-31 01:58:43,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:58:43,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 01:58:43,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:58:43,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 01:58:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2023-08-31 01:58:43,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-08-31 01:58:43,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 3881 transitions, 91180 flow. Second operand has 26 states, 26 states have (on average 72.34615384615384) internal successors, (1881), 26 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:43,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:58:43,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-08-31 01:58:43,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:59:39,047 INFO L130 PetriNetUnfolder]: 28693/49585 cut-off events. [2023-08-31 01:59:39,047 INFO L131 PetriNetUnfolder]: For 2949205/2949207 co-relation queries the response was YES. [2023-08-31 01:59:40,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571897 conditions, 49585 events. 28693/49585 cut-off events. For 2949205/2949207 co-relation queries the response was YES. Maximal size of possible extension queue 2166. Compared 434078 event pairs, 708 based on Foata normal form. 1454/51037 useless extension candidates. Maximal degree in co-relation 571424. Up to 12135 conditions per place. [2023-08-31 01:59:40,798 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 2792 selfloop transitions, 3595 changer transitions 2027/8424 dead transitions. [2023-08-31 01:59:40,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 8424 transitions, 217806 flow [2023-08-31 01:59:40,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2023-08-31 01:59:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2023-08-31 01:59:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 12929 transitions. [2023-08-31 01:59:40,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42959197235513025 [2023-08-31 01:59:40,806 INFO L72 ComplementDD]: Start complementDD. Operand 171 states and 12929 transitions. [2023-08-31 01:59:40,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 171 states and 12929 transitions. [2023-08-31 01:59:40,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:59:40,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 171 states and 12929 transitions. [2023-08-31 01:59:40,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 172 states, 171 states have (on average 75.60818713450293) internal successors, (12929), 171 states have internal predecessors, (12929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:40,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 172 states, 172 states have (on average 176.0) internal successors, (30272), 172 states have internal predecessors, (30272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:40,832 INFO L81 ComplementDD]: Finished complementDD. Result has 172 states, 172 states have (on average 176.0) internal successors, (30272), 172 states have internal predecessors, (30272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:40,832 INFO L175 Difference]: Start difference. First operand has 677 places, 3881 transitions, 91180 flow. Second operand 171 states and 12929 transitions. [2023-08-31 01:59:40,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 8424 transitions, 217806 flow [2023-08-31 02:01:50,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 8424 transitions, 208378 flow, removed 4636 selfloop flow, removed 80 redundant places. [2023-08-31 02:01:50,817 INFO L231 Difference]: Finished difference. Result has 806 places, 5934 transitions, 150852 flow [2023-08-31 02:01:50,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=88463, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1840, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=171, PETRI_FLOW=150852, PETRI_PLACES=806, PETRI_TRANSITIONS=5934} [2023-08-31 02:01:50,821 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 776 predicate places. [2023-08-31 02:01:50,821 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 5934 transitions, 150852 flow [2023-08-31 02:01:50,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 72.34615384615384) internal successors, (1881), 26 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:01:50,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:01:50,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:01:50,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 02:01:51,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:01:51,026 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:01:51,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:01:51,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1553467846, now seen corresponding path program 9 times [2023-08-31 02:01:51,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:01:51,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876263044] [2023-08-31 02:01:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:01:51,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:01:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:01:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:01:51,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:01:51,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876263044] [2023-08-31 02:01:51,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876263044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:01:51,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408321565] [2023-08-31 02:01:51,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:01:51,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:01:51,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:01:51,390 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:01:51,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 02:01:51,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 02:01:51,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:01:51,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 02:01:51,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:01:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:01:51,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:01:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:01:52,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408321565] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:01:52,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:01:52,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-08-31 02:01:52,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618792157] [2023-08-31 02:01:52,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:01:52,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 02:01:52,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:01:52,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 02:01:52,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-08-31 02:01:52,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 176 [2023-08-31 02:01:52,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 5934 transitions, 150852 flow. Second operand has 25 states, 25 states have (on average 69.64) internal successors, (1741), 25 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:01:52,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:01:52,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 176 [2023-08-31 02:01:52,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:03:21,204 INFO L130 PetriNetUnfolder]: 31584/54305 cut-off events. [2023-08-31 02:03:21,205 INFO L131 PetriNetUnfolder]: For 1738462/1738462 co-relation queries the response was YES. [2023-08-31 02:03:23,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601862 conditions, 54305 events. 31584/54305 cut-off events. For 1738462/1738462 co-relation queries the response was YES. Maximal size of possible extension queue 2222. Compared 476804 event pairs, 1001 based on Foata normal form. 792/55097 useless extension candidates. Maximal degree in co-relation 601487. Up to 22152 conditions per place. [2023-08-31 02:03:24,071 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 4606 selfloop transitions, 3058 changer transitions 843/8507 dead transitions. [2023-08-31 02:03:24,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 8507 transitions, 236681 flow [2023-08-31 02:03:24,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-31 02:03:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-31 02:03:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5151 transitions. [2023-08-31 02:03:24,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122119078104994 [2023-08-31 02:03:24,075 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5151 transitions. [2023-08-31 02:03:24,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5151 transitions. [2023-08-31 02:03:24,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:03:24,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5151 transitions. [2023-08-31 02:03:24,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 72.54929577464789) internal successors, (5151), 71 states have internal predecessors, (5151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:03:24,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 176.0) internal successors, (12672), 72 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:03:24,085 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 176.0) internal successors, (12672), 72 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:03:24,086 INFO L175 Difference]: Start difference. First operand has 806 places, 5934 transitions, 150852 flow. Second operand 71 states and 5151 transitions. [2023-08-31 02:03:24,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 8507 transitions, 236681 flow [2023-08-31 02:06:27,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 8507 transitions, 227761 flow, removed 4228 selfloop flow, removed 82 redundant places. [2023-08-31 02:06:28,122 INFO L231 Difference]: Finished difference. Result has 763 places, 7250 transitions, 191879 flow [2023-08-31 02:06:28,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=145078, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=191879, PETRI_PLACES=763, PETRI_TRANSITIONS=7250} [2023-08-31 02:06:28,127 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 733 predicate places. [2023-08-31 02:06:28,127 INFO L495 AbstractCegarLoop]: Abstraction has has 763 places, 7250 transitions, 191879 flow [2023-08-31 02:06:28,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 69.64) internal successors, (1741), 25 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:06:28,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:06:28,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:06:28,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 02:06:28,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-31 02:06:28,335 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:06:28,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:06:28,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1898947804, now seen corresponding path program 10 times [2023-08-31 02:06:28,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:06:28,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865729635] [2023-08-31 02:06:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:06:28,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:06:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:06:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:06:28,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:06:28,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865729635] [2023-08-31 02:06:28,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865729635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:06:28,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197367813] [2023-08-31 02:06:28,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:06:28,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:06:28,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:06:28,980 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:06:28,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 02:06:29,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:06:29,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:06:29,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 02:06:29,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:06:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:06:29,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:06:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:06:29,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197367813] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:06:29,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:06:29,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-31 02:06:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050714338] [2023-08-31 02:06:29,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:06:29,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 02:06:29,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:06:29,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 02:06:29,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2023-08-31 02:06:29,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-08-31 02:06:29,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 7250 transitions, 191879 flow. Second operand has 26 states, 26 states have (on average 72.26923076923077) internal successors, (1879), 26 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:06:29,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:06:29,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-08-31 02:06:29,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:09:08,346 INFO L130 PetriNetUnfolder]: 46563/80913 cut-off events. [2023-08-31 02:09:08,347 INFO L131 PetriNetUnfolder]: For 2946008/2946013 co-relation queries the response was YES. [2023-08-31 02:09:11,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 918404 conditions, 80913 events. 46563/80913 cut-off events. For 2946008/2946013 co-relation queries the response was YES. Maximal size of possible extension queue 3521. Compared 764498 event pairs, 1234 based on Foata normal form. 1801/82714 useless extension candidates. Maximal degree in co-relation 916300. Up to 23220 conditions per place. [2023-08-31 02:09:12,259 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 4901 selfloop transitions, 5241 changer transitions 2470/12625 dead transitions. [2023-08-31 02:09:12,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 12625 transitions, 363547 flow [2023-08-31 02:09:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2023-08-31 02:09:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2023-08-31 02:09:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 12137 transitions. [2023-08-31 02:09:12,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310014204545455 [2023-08-31 02:09:12,267 INFO L72 ComplementDD]: Start complementDD. Operand 160 states and 12137 transitions. [2023-08-31 02:09:12,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 160 states and 12137 transitions. [2023-08-31 02:09:12,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:09:12,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 160 states and 12137 transitions. [2023-08-31 02:09:12,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 161 states, 160 states have (on average 75.85625) internal successors, (12137), 160 states have internal predecessors, (12137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:12,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 161 states, 161 states have (on average 176.0) internal successors, (28336), 161 states have internal predecessors, (28336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:12,290 INFO L81 ComplementDD]: Finished complementDD. Result has 161 states, 161 states have (on average 176.0) internal successors, (28336), 161 states have internal predecessors, (28336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:12,290 INFO L175 Difference]: Start difference. First operand has 763 places, 7250 transitions, 191879 flow. Second operand 160 states and 12137 transitions. [2023-08-31 02:09:12,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 12625 transitions, 363547 flow Killed by 15