./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.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/popl20-difference-det.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 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e --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 02:30:39,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:30:39,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:30:39,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:30:39,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:30:39,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:30:39,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:30:39,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:30:39,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:30:39,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:30:39,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:30:39,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:30:39,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:30:39,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:30:39,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:30:39,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:30:39,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:30:39,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:30:39,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:30:39,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:30:39,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:30:39,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:30:39,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:30:39,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:30:39,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:30:39,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:30:39,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:30:39,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:30:39,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:30:39,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:30:39,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:30:39,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:30:39,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:30:39,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:30:39,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:30:39,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:30:39,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:30:39,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:30:39,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:30:39,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:30:39,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:30:39,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:30:39,475 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:30:39,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:30:39,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:30:39,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:30:39,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:30:39,478 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:30:39,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:30:39,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:30:39,479 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:30:39,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:30:39,481 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:30:39,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:30:39,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:30:39,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:30:39,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:30:39,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:30:39,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:30:39,482 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:30:39,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:30:39,483 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:30:39,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:30:39,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:30:39,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:30:39,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:30:39,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:30:39,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:30:39,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:30:39,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:30:39,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:30:39,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:30:39,490 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:30:39,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:30:39,491 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:30:39,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:30:39,491 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:30:39,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:30:39,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:30:39,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:30:39,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:30:39,856 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:30:39,856 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:30:39,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-31 02:30:41,008 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:30:41,228 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:30:41,228 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-31 02:30:41,234 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58bfc7a3f/20409a20849d447e9ddfecb14210196d/FLAG96ec1979a [2023-08-31 02:30:41,249 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58bfc7a3f/20409a20849d447e9ddfecb14210196d [2023-08-31 02:30:41,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:30:41,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:30:41,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:30:41,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:30:41,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:30:41,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50058d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41, skipping insertion in model container [2023-08-31 02:30:41,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:30:41,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:30:41,443 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/popl20-difference-det.wvr.c[2507,2520] [2023-08-31 02:30:41,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:30:41,455 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:30:41,487 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/popl20-difference-det.wvr.c[2507,2520] [2023-08-31 02:30:41,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:30:41,494 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:30:41,495 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:30:41,500 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:30:41,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41 WrapperNode [2023-08-31 02:30:41,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:30:41,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:30:41,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:30:41,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:30:41,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,534 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2023-08-31 02:30:41,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:30:41,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:30:41,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:30:41,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:30:41,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,556 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:30:41,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:30:41,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:30:41,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:30:41,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41" (1/1) ... [2023-08-31 02:30:41,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:30:41,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:41,604 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 02:30:41,657 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 02:30:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:30:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:30:41,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:30:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:30:41,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:30:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 02:30:41,690 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 02:30:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-31 02:30:41,690 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-31 02:30:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:30:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:30:41,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:30:41,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:30:41,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:30:41,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:30:41,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:30:41,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:30:41,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:30:41,693 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 02:30:41,826 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:30:41,828 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:30:42,117 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:30:42,159 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:30:42,160 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 02:30:42,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:30:42 BoogieIcfgContainer [2023-08-31 02:30:42,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:30:42,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:30:42,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:30:42,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:30:42,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:30:41" (1/3) ... [2023-08-31 02:30:42,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6036e816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:30:42, skipping insertion in model container [2023-08-31 02:30:42,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:30:41" (2/3) ... [2023-08-31 02:30:42,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6036e816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:30:42, skipping insertion in model container [2023-08-31 02:30:42,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:30:42" (3/3) ... [2023-08-31 02:30:42,172 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-08-31 02:30:42,179 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:30:42,188 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:30:42,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:30:42,189 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:30:42,291 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 02:30:42,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 125 transitions, 282 flow [2023-08-31 02:30:42,418 INFO L130 PetriNetUnfolder]: 9/121 cut-off events. [2023-08-31 02:30:42,419 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:30:42,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 121 events. 9/121 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-31 02:30:42,425 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 125 transitions, 282 flow [2023-08-31 02:30:42,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 109 transitions, 242 flow [2023-08-31 02:30:42,434 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:30:42,445 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 109 transitions, 242 flow [2023-08-31 02:30:42,448 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 109 transitions, 242 flow [2023-08-31 02:30:42,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 109 transitions, 242 flow [2023-08-31 02:30:42,493 INFO L130 PetriNetUnfolder]: 9/109 cut-off events. [2023-08-31 02:30:42,493 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:30:42,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 109 events. 9/109 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 94 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-31 02:30:42,498 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-08-31 02:30:45,965 INFO L134 LiptonReduction]: Checked pairs total: 2650 [2023-08-31 02:30:45,965 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-31 02:30:45,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:30:45,986 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;@309b5ead, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:30:45,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 02:30:45,994 INFO L130 PetriNetUnfolder]: 4/28 cut-off events. [2023-08-31 02:30:45,995 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:30:45,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:45,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:45,996 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 2 more)] === [2023-08-31 02:30:46,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:46,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2017117140, now seen corresponding path program 1 times [2023-08-31 02:30:46,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:46,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742251673] [2023-08-31 02:30:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:46,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:46,522 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 02:30:46,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:46,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742251673] [2023-08-31 02:30:46,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742251673] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:30:46,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:30:46,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 02:30:46,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967292837] [2023-08-31 02:30:46,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:30:46,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:30:46,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:46,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:30:46,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:30:46,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 212 [2023-08-31 02:30:46,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 02:30:46,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:46,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 212 [2023-08-31 02:30:46,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:46,826 INFO L130 PetriNetUnfolder]: 1537/1954 cut-off events. [2023-08-31 02:30:46,827 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-31 02:30:46,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 1954 events. 1537/1954 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6416 event pairs, 141 based on Foata normal form. 1/1135 useless extension candidates. Maximal degree in co-relation 3091. Up to 1733 conditions per place. [2023-08-31 02:30:46,842 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 41 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-08-31 02:30:46,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 241 flow [2023-08-31 02:30:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:30:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:30:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-31 02:30:46,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707547169811321 [2023-08-31 02:30:46,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-31 02:30:46,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-31 02:30:46,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:46,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-31 02:30:46,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 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 02:30:46,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 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 02:30:46,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 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 02:30:46,881 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 363 transitions. [2023-08-31 02:30:46,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 241 flow [2023-08-31 02:30:46,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 51 transitions, 211 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-31 02:30:46,914 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 99 flow [2023-08-31 02:30:46,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-08-31 02:30:46,921 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-08-31 02:30:46,921 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 99 flow [2023-08-31 02:30:46,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 02:30:46,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:46,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:46,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:30:46,926 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 2 more)] === [2023-08-31 02:30:46,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:46,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1386775174, now seen corresponding path program 1 times [2023-08-31 02:30:46,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:46,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853896444] [2023-08-31 02:30:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:46,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:47,053 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 02:30:47,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:47,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853896444] [2023-08-31 02:30:47,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853896444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:30:47,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:30:47,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:30:47,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700594503] [2023-08-31 02:30:47,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:30:47,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:30:47,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:30:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:30:47,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-08-31 02:30:47,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 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 02:30:47,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:47,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-08-31 02:30:47,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:47,471 INFO L130 PetriNetUnfolder]: 2495/3283 cut-off events. [2023-08-31 02:30:47,471 INFO L131 PetriNetUnfolder]: For 972/972 co-relation queries the response was YES. [2023-08-31 02:30:47,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8050 conditions, 3283 events. 2495/3283 cut-off events. For 972/972 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13635 event pairs, 520 based on Foata normal form. 48/3311 useless extension candidates. Maximal degree in co-relation 2873. Up to 1616 conditions per place. [2023-08-31 02:30:47,492 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 84 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2023-08-31 02:30:47,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 91 transitions, 452 flow [2023-08-31 02:30:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:30:47,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:30:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-08-31 02:30:47,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405660377358491 [2023-08-31 02:30:47,496 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-08-31 02:30:47,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-08-31 02:30:47,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:47,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-08-31 02:30:47,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 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 02:30:47,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:30:47,502 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:30:47,502 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 99 flow. Second operand 5 states and 573 transitions. [2023-08-31 02:30:47,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 91 transitions, 452 flow [2023-08-31 02:30:47,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 91 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:30:47,505 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 129 flow [2023-08-31 02:30:47,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-08-31 02:30:47,506 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-31 02:30:47,507 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 129 flow [2023-08-31 02:30:47,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 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 02:30:47,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:47,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:47,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 02:30:47,508 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 2 more)] === [2023-08-31 02:30:47,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:47,509 INFO L85 PathProgramCache]: Analyzing trace with hash -418684095, now seen corresponding path program 1 times [2023-08-31 02:30:47,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:47,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240645814] [2023-08-31 02:30:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:47,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:47,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:47,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240645814] [2023-08-31 02:30:47,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240645814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:47,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363913883] [2023-08-31 02:30:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:47,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:47,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:47,633 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 02:30:47,653 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 02:30:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:47,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 02:30:47,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:47,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:47,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363913883] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:47,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:47,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 02:30:47,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698417108] [2023-08-31 02:30:47,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:47,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 02:30:47,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:47,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 02:30:47,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-31 02:30:47,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:30:47,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 129 flow. Second operand has 8 states, 8 states have (on average 100.75) internal successors, (806), 8 states have internal predecessors, (806), 0 states have call successors, (0), 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 02:30:47,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:47,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:30:47,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:48,489 INFO L130 PetriNetUnfolder]: 3361/4509 cut-off events. [2023-08-31 02:30:48,490 INFO L131 PetriNetUnfolder]: For 3715/4180 co-relation queries the response was YES. [2023-08-31 02:30:48,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12634 conditions, 4509 events. 3361/4509 cut-off events. For 3715/4180 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 20174 event pairs, 707 based on Foata normal form. 570/5006 useless extension candidates. Maximal degree in co-relation 8079. Up to 1944 conditions per place. [2023-08-31 02:30:48,522 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 89 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-31 02:30:48,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 97 transitions, 532 flow [2023-08-31 02:30:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:30:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:30:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 565 transitions. [2023-08-31 02:30:48,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330188679245284 [2023-08-31 02:30:48,524 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 565 transitions. [2023-08-31 02:30:48,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 565 transitions. [2023-08-31 02:30:48,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:48,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 565 transitions. [2023-08-31 02:30:48,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 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 02:30:48,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:30:48,529 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:30:48,529 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 129 flow. Second operand 5 states and 565 transitions. [2023-08-31 02:30:48,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 97 transitions, 532 flow [2023-08-31 02:30:48,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 97 transitions, 513 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 02:30:48,538 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 159 flow [2023-08-31 02:30:48,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-31 02:30:48,539 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-08-31 02:30:48,539 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 159 flow [2023-08-31 02:30:48,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 100.75) internal successors, (806), 8 states have internal predecessors, (806), 0 states have call successors, (0), 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 02:30:48,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:48,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:48,551 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 02:30:48,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:48,746 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 2 more)] === [2023-08-31 02:30:48,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:48,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1510344313, now seen corresponding path program 1 times [2023-08-31 02:30:48,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:48,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443003276] [2023-08-31 02:30:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:48,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:48,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443003276] [2023-08-31 02:30:48,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443003276] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:48,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405186639] [2023-08-31 02:30:48,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:48,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:48,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:48,845 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 02:30:48,849 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 02:30:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:48,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 02:30:48,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:49,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:49,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405186639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:49,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:49,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 02:30:49,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815469100] [2023-08-31 02:30:49,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:49,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 02:30:49,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 02:30:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-31 02:30:49,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:30:49,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 159 flow. Second operand has 8 states, 8 states have (on average 101.625) internal successors, (813), 8 states have internal predecessors, (813), 0 states have call successors, (0), 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 02:30:49,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:49,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:30:49,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:49,617 INFO L130 PetriNetUnfolder]: 3413/4567 cut-off events. [2023-08-31 02:30:49,618 INFO L131 PetriNetUnfolder]: For 5980/6404 co-relation queries the response was YES. [2023-08-31 02:30:49,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14384 conditions, 4567 events. 3413/4567 cut-off events. For 5980/6404 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20233 event pairs, 479 based on Foata normal form. 512/5013 useless extension candidates. Maximal degree in co-relation 11186. Up to 2034 conditions per place. [2023-08-31 02:30:49,655 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 88 selfloop transitions, 5 changer transitions 0/96 dead transitions. [2023-08-31 02:30:49,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 96 transitions, 573 flow [2023-08-31 02:30:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:30:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:30:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 563 transitions. [2023-08-31 02:30:49,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311320754716982 [2023-08-31 02:30:49,658 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 563 transitions. [2023-08-31 02:30:49,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 563 transitions. [2023-08-31 02:30:49,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:49,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 563 transitions. [2023-08-31 02:30:49,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 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 02:30:49,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:30:49,663 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:30:49,664 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 159 flow. Second operand 5 states and 563 transitions. [2023-08-31 02:30:49,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 96 transitions, 573 flow [2023-08-31 02:30:49,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 96 transitions, 564 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 02:30:49,680 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 188 flow [2023-08-31 02:30:49,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-08-31 02:30:49,681 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2023-08-31 02:30:49,682 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 188 flow [2023-08-31 02:30:49,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.625) internal successors, (813), 8 states have internal predecessors, (813), 0 states have call successors, (0), 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 02:30:49,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:49,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:49,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:49,888 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,SelfDestructingSolverStorable3 [2023-08-31 02:30:49,889 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 2 more)] === [2023-08-31 02:30:49,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:49,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1953734941, now seen corresponding path program 2 times [2023-08-31 02:30:49,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:49,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173503990] [2023-08-31 02:30:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:49,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:50,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:50,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173503990] [2023-08-31 02:30:50,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173503990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:50,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152655841] [2023-08-31 02:30:50,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:30:50,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:50,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:50,017 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 02:30:50,046 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 02:30:50,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:30:50,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:50,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 02:30:50,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:50,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:50,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152655841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:50,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:50,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 02:30:50,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645101228] [2023-08-31 02:30:50,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:50,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 02:30:50,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:50,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 02:30:50,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-31 02:30:50,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:30:50,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 188 flow. Second operand has 10 states, 10 states have (on average 101.7) internal successors, (1017), 10 states have internal predecessors, (1017), 0 states have call successors, (0), 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 02:30:50,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:50,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:30:50,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:51,129 INFO L130 PetriNetUnfolder]: 5065/6869 cut-off events. [2023-08-31 02:30:51,129 INFO L131 PetriNetUnfolder]: For 13799/14765 co-relation queries the response was YES. [2023-08-31 02:30:51,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23179 conditions, 6869 events. 5065/6869 cut-off events. For 13799/14765 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 33838 event pairs, 649 based on Foata normal form. 1068/7721 useless extension candidates. Maximal degree in co-relation 16109. Up to 2724 conditions per place. [2023-08-31 02:30:51,176 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 149 selfloop transitions, 13 changer transitions 0/166 dead transitions. [2023-08-31 02:30:51,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 166 transitions, 1054 flow [2023-08-31 02:30:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:30:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:30:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 907 transitions. [2023-08-31 02:30:51,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347877358490566 [2023-08-31 02:30:51,179 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 907 transitions. [2023-08-31 02:30:51,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 907 transitions. [2023-08-31 02:30:51,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:51,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 907 transitions. [2023-08-31 02:30:51,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.375) internal successors, (907), 8 states have internal predecessors, (907), 0 states have call successors, (0), 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 02:30:51,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 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 02:30:51,185 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 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 02:30:51,185 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 188 flow. Second operand 8 states and 907 transitions. [2023-08-31 02:30:51,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 166 transitions, 1054 flow [2023-08-31 02:30:51,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 166 transitions, 1012 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-31 02:30:51,232 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 281 flow [2023-08-31 02:30:51,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=281, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-31 02:30:51,233 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-08-31 02:30:51,233 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 281 flow [2023-08-31 02:30:51,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.7) internal successors, (1017), 10 states have internal predecessors, (1017), 0 states have call successors, (0), 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 02:30:51,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:51,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:51,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 02:30:51,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:51,440 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 2 more)] === [2023-08-31 02:30:51,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:51,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1707640579, now seen corresponding path program 2 times [2023-08-31 02:30:51,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:51,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653183302] [2023-08-31 02:30:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:51,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:51,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:51,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653183302] [2023-08-31 02:30:51,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653183302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:51,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546530175] [2023-08-31 02:30:51,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:30:51,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:51,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:51,514 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 02:30:51,539 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 02:30:51,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:30:51,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:51,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 02:30:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:51,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:51,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546530175] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:51,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:51,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 02:30:51,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74761739] [2023-08-31 02:30:51,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:51,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 02:30:51,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:51,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 02:30:51,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-31 02:30:51,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:30:51,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 281 flow. Second operand has 10 states, 10 states have (on average 100.3) internal successors, (1003), 10 states have internal predecessors, (1003), 0 states have call successors, (0), 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 02:30:51,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:51,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:30:51,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:52,970 INFO L130 PetriNetUnfolder]: 8404/11264 cut-off events. [2023-08-31 02:30:52,971 INFO L131 PetriNetUnfolder]: For 34345/36956 co-relation queries the response was YES. [2023-08-31 02:30:53,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43194 conditions, 11264 events. 8404/11264 cut-off events. For 34345/36956 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 57068 event pairs, 736 based on Foata normal form. 951/11972 useless extension candidates. Maximal degree in co-relation 36360. Up to 4803 conditions per place. [2023-08-31 02:30:53,068 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 175 selfloop transitions, 14 changer transitions 0/193 dead transitions. [2023-08-31 02:30:53,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 193 transitions, 1524 flow [2023-08-31 02:30:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:30:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:30:53,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 901 transitions. [2023-08-31 02:30:53,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-08-31 02:30:53,072 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 901 transitions. [2023-08-31 02:30:53,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 901 transitions. [2023-08-31 02:30:53,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:53,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 901 transitions. [2023-08-31 02:30:53,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.625) internal successors, (901), 8 states have internal predecessors, (901), 0 states have call successors, (0), 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 02:30:53,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 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 02:30:53,078 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 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 02:30:53,078 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 281 flow. Second operand 8 states and 901 transitions. [2023-08-31 02:30:53,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 193 transitions, 1524 flow [2023-08-31 02:30:53,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 193 transitions, 1424 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-31 02:30:53,147 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 370 flow [2023-08-31 02:30:53,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=370, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-08-31 02:30:53,150 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 28 predicate places. [2023-08-31 02:30:53,150 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 370 flow [2023-08-31 02:30:53,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.3) internal successors, (1003), 10 states have internal predecessors, (1003), 0 states have call successors, (0), 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 02:30:53,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:53,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:53,167 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 02:30:53,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:53,357 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 2 more)] === [2023-08-31 02:30:53,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:53,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2076753269, now seen corresponding path program 3 times [2023-08-31 02:30:53,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:53,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278354978] [2023-08-31 02:30:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:53,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:53,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:53,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278354978] [2023-08-31 02:30:53,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278354978] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:53,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766021841] [2023-08-31 02:30:53,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:30:53,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:53,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:53,446 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 02:30:53,450 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 02:30:53,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:30:53,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:53,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 02:30:53,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:53,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:30:53,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766021841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:53,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:53,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 02:30:53,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071239772] [2023-08-31 02:30:53,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:53,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 02:30:53,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:53,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 02:30:53,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-31 02:30:53,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:30:53,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 370 flow. Second operand has 10 states, 10 states have (on average 101.7) internal successors, (1017), 10 states have internal predecessors, (1017), 0 states have call successors, (0), 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 02:30:53,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:53,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:30:53,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:55,174 INFO L130 PetriNetUnfolder]: 10652/14308 cut-off events. [2023-08-31 02:30:55,174 INFO L131 PetriNetUnfolder]: For 57338/60554 co-relation queries the response was YES. [2023-08-31 02:30:55,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60004 conditions, 14308 events. 10652/14308 cut-off events. For 57338/60554 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 76201 event pairs, 2167 based on Foata normal form. 1607/15471 useless extension candidates. Maximal degree in co-relation 50602. Up to 6486 conditions per place. [2023-08-31 02:30:55,289 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 125 selfloop transitions, 16 changer transitions 0/146 dead transitions. [2023-08-31 02:30:55,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 146 transitions, 1196 flow [2023-08-31 02:30:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:30:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:30:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2023-08-31 02:30:55,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2023-08-31 02:30:55,292 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2023-08-31 02:30:55,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2023-08-31 02:30:55,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:55,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2023-08-31 02:30:55,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 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 02:30:55,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:30:55,296 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:30:55,296 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 370 flow. Second operand 5 states and 570 transitions. [2023-08-31 02:30:55,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 146 transitions, 1196 flow [2023-08-31 02:30:55,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 146 transitions, 1146 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-31 02:30:55,423 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 473 flow [2023-08-31 02:30:55,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=473, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2023-08-31 02:30:55,424 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-08-31 02:30:55,424 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 473 flow [2023-08-31 02:30:55,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.7) internal successors, (1017), 10 states have internal predecessors, (1017), 0 states have call successors, (0), 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 02:30:55,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:55,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:55,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:55,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:55,632 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 2 more)] === [2023-08-31 02:30:55,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1065793488, now seen corresponding path program 1 times [2023-08-31 02:30:55,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:55,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528138644] [2023-08-31 02:30:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:55,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:55,704 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 02:30:55,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:55,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528138644] [2023-08-31 02:30:55,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528138644] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:30:55,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:30:55,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:30:55,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862303096] [2023-08-31 02:30:55,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:30:55,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:30:55,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:30:55,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:30:55,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-08-31 02:30:55,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 473 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 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 02:30:55,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:55,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-08-31 02:30:55,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:56,911 INFO L130 PetriNetUnfolder]: 11094/14850 cut-off events. [2023-08-31 02:30:56,911 INFO L131 PetriNetUnfolder]: For 61372/64597 co-relation queries the response was YES. [2023-08-31 02:30:56,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65847 conditions, 14850 events. 11094/14850 cut-off events. For 61372/64597 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 79472 event pairs, 971 based on Foata normal form. 1644/16054 useless extension candidates. Maximal degree in co-relation 56268. Up to 7770 conditions per place. [2023-08-31 02:30:57,029 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 115 selfloop transitions, 15 changer transitions 0/135 dead transitions. [2023-08-31 02:30:57,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 1180 flow [2023-08-31 02:30:57,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:30:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:30:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 567 transitions. [2023-08-31 02:30:57,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349056603773585 [2023-08-31 02:30:57,032 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 567 transitions. [2023-08-31 02:30:57,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 567 transitions. [2023-08-31 02:30:57,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:57,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 567 transitions. [2023-08-31 02:30:57,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 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 02:30:57,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:30:57,036 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:30:57,036 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 473 flow. Second operand 5 states and 567 transitions. [2023-08-31 02:30:57,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 1180 flow [2023-08-31 02:30:57,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 135 transitions, 1154 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-31 02:30:57,270 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 525 flow [2023-08-31 02:30:57,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=525, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2023-08-31 02:30:57,270 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 38 predicate places. [2023-08-31 02:30:57,271 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 525 flow [2023-08-31 02:30:57,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 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 02:30:57,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:57,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:57,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 02:30:57,272 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 2 more)] === [2023-08-31 02:30:57,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:57,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1179771516, now seen corresponding path program 2 times [2023-08-31 02:30:57,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:57,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837538369] [2023-08-31 02:30:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:57,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:57,333 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 02:30:57,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837538369] [2023-08-31 02:30:57,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837538369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:30:57,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:30:57,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:30:57,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833929432] [2023-08-31 02:30:57,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:30:57,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:30:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:30:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:30:57,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-31 02:30:57,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 525 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:30:57,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:57,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-31 02:30:57,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:58,402 INFO L130 PetriNetUnfolder]: 9512/12930 cut-off events. [2023-08-31 02:30:58,402 INFO L131 PetriNetUnfolder]: For 70712/74116 co-relation queries the response was YES. [2023-08-31 02:30:58,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58319 conditions, 12930 events. 9512/12930 cut-off events. For 70712/74116 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 68496 event pairs, 2404 based on Foata normal form. 1498/14218 useless extension candidates. Maximal degree in co-relation 54145. Up to 7286 conditions per place. [2023-08-31 02:30:58,502 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 141 selfloop transitions, 11 changer transitions 0/158 dead transitions. [2023-08-31 02:30:58,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 158 transitions, 1568 flow [2023-08-31 02:30:58,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:30:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:30:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2023-08-31 02:30:58,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386792452830189 [2023-08-31 02:30:58,505 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2023-08-31 02:30:58,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2023-08-31 02:30:58,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:58,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2023-08-31 02:30:58,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 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 02:30:58,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:30:58,508 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:30:58,509 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 525 flow. Second operand 5 states and 571 transitions. [2023-08-31 02:30:58,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 158 transitions, 1568 flow [2023-08-31 02:30:58,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 158 transitions, 1508 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-31 02:30:58,653 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 547 flow [2023-08-31 02:30:58,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=547, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2023-08-31 02:30:58,654 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-08-31 02:30:58,654 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 547 flow [2023-08-31 02:30:58,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:30:58,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:58,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:58,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 02:30:58,655 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 2 more)] === [2023-08-31 02:30:58,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1826686174, now seen corresponding path program 2 times [2023-08-31 02:30:58,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:58,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252083760] [2023-08-31 02:30:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:58,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:58,714 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 02:30:58,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:58,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252083760] [2023-08-31 02:30:58,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252083760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:30:58,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:30:58,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:30:58,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70574134] [2023-08-31 02:30:58,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:30:58,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:30:58,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:58,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:30:58,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:30:58,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-08-31 02:30:58,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 547 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 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 02:30:58,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:58,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-08-31 02:30:58,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:59,899 INFO L130 PetriNetUnfolder]: 10846/14650 cut-off events. [2023-08-31 02:30:59,900 INFO L131 PetriNetUnfolder]: For 77876/81912 co-relation queries the response was YES. [2023-08-31 02:30:59,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68476 conditions, 14650 events. 10846/14650 cut-off events. For 77876/81912 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 80807 event pairs, 2073 based on Foata normal form. 1808/16120 useless extension candidates. Maximal degree in co-relation 58877. Up to 7788 conditions per place. [2023-08-31 02:31:00,021 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 145 selfloop transitions, 12 changer transitions 2/164 dead transitions. [2023-08-31 02:31:00,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 164 transitions, 1513 flow [2023-08-31 02:31:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:31:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:31:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 577 transitions. [2023-08-31 02:31:00,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443396226415095 [2023-08-31 02:31:00,027 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 577 transitions. [2023-08-31 02:31:00,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 577 transitions. [2023-08-31 02:31:00,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:00,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 577 transitions. [2023-08-31 02:31:00,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.4) internal successors, (577), 5 states have internal predecessors, (577), 0 states have call successors, (0), 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 02:31:00,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:00,031 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:00,031 INFO L175 Difference]: Start difference. First operand has 79 places, 68 transitions, 547 flow. Second operand 5 states and 577 transitions. [2023-08-31 02:31:00,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 164 transitions, 1513 flow [2023-08-31 02:31:00,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 164 transitions, 1427 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-31 02:31:00,174 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 578 flow [2023-08-31 02:31:00,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=578, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2023-08-31 02:31:00,175 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2023-08-31 02:31:00,175 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 578 flow [2023-08-31 02:31:00,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 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 02:31:00,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:00,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:00,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 02:31:00,176 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 2 more)] === [2023-08-31 02:31:00,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:00,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1678969827, now seen corresponding path program 3 times [2023-08-31 02:31:00,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:00,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753750314] [2023-08-31 02:31:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:00,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:00,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:00,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753750314] [2023-08-31 02:31:00,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753750314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:00,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034315415] [2023-08-31 02:31:00,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:31:00,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:00,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:00,266 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 02:31:00,306 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 02:31:00,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:31:00,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:00,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 02:31:00,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:00,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:00,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034315415] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:00,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:00,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 02:31:00,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119893385] [2023-08-31 02:31:00,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:00,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 02:31:00,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:00,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 02:31:00,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-31 02:31:00,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:31:00,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 578 flow. Second operand has 10 states, 10 states have (on average 100.7) internal successors, (1007), 10 states have internal predecessors, (1007), 0 states have call successors, (0), 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 02:31:00,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:00,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:31:00,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:01,818 INFO L130 PetriNetUnfolder]: 12722/17437 cut-off events. [2023-08-31 02:31:01,818 INFO L131 PetriNetUnfolder]: For 95235/100050 co-relation queries the response was YES. [2023-08-31 02:31:01,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82937 conditions, 17437 events. 12722/17437 cut-off events. For 95235/100050 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 97111 event pairs, 3252 based on Foata normal form. 2507/19640 useless extension candidates. Maximal degree in co-relation 78353. Up to 8886 conditions per place. [2023-08-31 02:31:01,984 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 146 selfloop transitions, 17 changer transitions 0/170 dead transitions. [2023-08-31 02:31:01,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 170 transitions, 1757 flow [2023-08-31 02:31:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:31:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:31:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2023-08-31 02:31:01,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5320754716981132 [2023-08-31 02:31:01,987 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2023-08-31 02:31:01,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2023-08-31 02:31:01,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:01,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2023-08-31 02:31:01,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 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 02:31:01,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:01,990 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:01,991 INFO L175 Difference]: Start difference. First operand has 83 places, 70 transitions, 578 flow. Second operand 5 states and 564 transitions. [2023-08-31 02:31:01,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 170 transitions, 1757 flow [2023-08-31 02:31:02,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 1685 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-08-31 02:31:02,253 INFO L231 Difference]: Finished difference. Result has 89 places, 77 transitions, 676 flow [2023-08-31 02:31:02,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=676, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2023-08-31 02:31:02,254 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2023-08-31 02:31:02,254 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 676 flow [2023-08-31 02:31:02,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.7) internal successors, (1007), 10 states have internal predecessors, (1007), 0 states have call successors, (0), 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 02:31:02,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:02,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:02,260 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 02:31:02,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:02,460 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 2 more)] === [2023-08-31 02:31:02,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1635530536, now seen corresponding path program 3 times [2023-08-31 02:31:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:02,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208200032] [2023-08-31 02:31:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:02,533 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 02:31:02,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:02,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208200032] [2023-08-31 02:31:02,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208200032] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:31:02,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:31:02,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:31:02,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953793947] [2023-08-31 02:31:02,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:31:02,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:31:02,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:02,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:31:02,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:31:02,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-31 02:31:02,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 676 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:02,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:02,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-31 02:31:02,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:03,915 INFO L130 PetriNetUnfolder]: 11930/16332 cut-off events. [2023-08-31 02:31:03,915 INFO L131 PetriNetUnfolder]: For 107941/112532 co-relation queries the response was YES. [2023-08-31 02:31:04,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81495 conditions, 16332 events. 11930/16332 cut-off events. For 107941/112532 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 93538 event pairs, 3390 based on Foata normal form. 2076/18144 useless extension candidates. Maximal degree in co-relation 66105. Up to 8704 conditions per place. [2023-08-31 02:31:04,119 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 154 selfloop transitions, 16 changer transitions 2/178 dead transitions. [2023-08-31 02:31:04,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 178 transitions, 1746 flow [2023-08-31 02:31:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:31:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:31:04,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 575 transitions. [2023-08-31 02:31:04,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2023-08-31 02:31:04,122 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 575 transitions. [2023-08-31 02:31:04,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 575 transitions. [2023-08-31 02:31:04,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:04,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 575 transitions. [2023-08-31 02:31:04,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 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 02:31:04,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:04,126 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:04,126 INFO L175 Difference]: Start difference. First operand has 89 places, 77 transitions, 676 flow. Second operand 5 states and 575 transitions. [2023-08-31 02:31:04,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 178 transitions, 1746 flow [2023-08-31 02:31:04,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 178 transitions, 1700 flow, removed 23 selfloop flow, removed 0 redundant places. [2023-08-31 02:31:04,395 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 722 flow [2023-08-31 02:31:04,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=722, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2023-08-31 02:31:04,396 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2023-08-31 02:31:04,396 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 722 flow [2023-08-31 02:31:04,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:04,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:04,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:04,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 02:31:04,397 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 2 more)] === [2023-08-31 02:31:04,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:04,397 INFO L85 PathProgramCache]: Analyzing trace with hash 439687930, now seen corresponding path program 4 times [2023-08-31 02:31:04,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:04,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148907861] [2023-08-31 02:31:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:04,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:04,459 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 02:31:04,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:04,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148907861] [2023-08-31 02:31:04,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148907861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:31:04,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:31:04,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:31:04,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288479677] [2023-08-31 02:31:04,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:31:04,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:31:04,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:04,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:31:04,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:31:04,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-31 02:31:04,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 722 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:04,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:04,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-31 02:31:04,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:05,710 INFO L130 PetriNetUnfolder]: 12388/16950 cut-off events. [2023-08-31 02:31:05,710 INFO L131 PetriNetUnfolder]: For 111307/115949 co-relation queries the response was YES. [2023-08-31 02:31:05,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86451 conditions, 16950 events. 12388/16950 cut-off events. For 111307/115949 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 95622 event pairs, 3634 based on Foata normal form. 1900/18564 useless extension candidates. Maximal degree in co-relation 76477. Up to 8836 conditions per place. [2023-08-31 02:31:05,889 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 155 selfloop transitions, 15 changer transitions 0/176 dead transitions. [2023-08-31 02:31:05,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 176 transitions, 1769 flow [2023-08-31 02:31:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:31:05,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:31:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2023-08-31 02:31:05,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386792452830189 [2023-08-31 02:31:05,892 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2023-08-31 02:31:05,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2023-08-31 02:31:05,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:05,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2023-08-31 02:31:05,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 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 02:31:05,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:05,896 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:05,896 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 722 flow. Second operand 5 states and 571 transitions. [2023-08-31 02:31:05,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 176 transitions, 1769 flow [2023-08-31 02:31:06,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 176 transitions, 1725 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-31 02:31:06,299 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 728 flow [2023-08-31 02:31:06,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=728, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2023-08-31 02:31:06,300 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2023-08-31 02:31:06,300 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 728 flow [2023-08-31 02:31:06,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:06,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:06,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:06,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 02:31:06,301 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 2 more)] === [2023-08-31 02:31:06,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:06,301 INFO L85 PathProgramCache]: Analyzing trace with hash 496335170, now seen corresponding path program 3 times [2023-08-31 02:31:06,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:06,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809513524] [2023-08-31 02:31:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:06,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:06,392 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 02:31:06,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:06,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809513524] [2023-08-31 02:31:06,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809513524] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:31:06,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:31:06,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:31:06,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976857197] [2023-08-31 02:31:06,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:31:06,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:31:06,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:06,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:31:06,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:31:06,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-31 02:31:06,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 728 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:06,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:06,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-31 02:31:06,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:07,643 INFO L130 PetriNetUnfolder]: 13022/17777 cut-off events. [2023-08-31 02:31:07,643 INFO L131 PetriNetUnfolder]: For 115257/120649 co-relation queries the response was YES. [2023-08-31 02:31:07,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90874 conditions, 17777 events. 13022/17777 cut-off events. For 115257/120649 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 99379 event pairs, 3174 based on Foata normal form. 2689/20312 useless extension candidates. Maximal degree in co-relation 82150. Up to 9978 conditions per place. [2023-08-31 02:31:07,844 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 159 selfloop transitions, 13 changer transitions 0/179 dead transitions. [2023-08-31 02:31:07,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 179 transitions, 1966 flow [2023-08-31 02:31:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:31:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:31:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 567 transitions. [2023-08-31 02:31:07,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349056603773585 [2023-08-31 02:31:07,846 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 567 transitions. [2023-08-31 02:31:07,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 567 transitions. [2023-08-31 02:31:07,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:07,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 567 transitions. [2023-08-31 02:31:07,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 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 02:31:07,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:07,849 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:07,849 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 728 flow. Second operand 5 states and 567 transitions. [2023-08-31 02:31:07,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 179 transitions, 1966 flow [2023-08-31 02:31:08,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 179 transitions, 1874 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-31 02:31:08,123 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 735 flow [2023-08-31 02:31:08,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=735, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2023-08-31 02:31:08,124 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 60 predicate places. [2023-08-31 02:31:08,124 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 735 flow [2023-08-31 02:31:08,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:08,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:08,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:08,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 02:31:08,124 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 2 more)] === [2023-08-31 02:31:08,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash 261516316, now seen corresponding path program 4 times [2023-08-31 02:31:08,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:08,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387036984] [2023-08-31 02:31:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:08,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:08,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:08,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387036984] [2023-08-31 02:31:08,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387036984] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:08,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431067457] [2023-08-31 02:31:08,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:31:08,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:08,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:08,216 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 02:31:08,219 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 02:31:08,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:31:08,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 02:31:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:08,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:08,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431067457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:08,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:08,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 02:31:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683046820] [2023-08-31 02:31:08,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:08,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 02:31:08,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:08,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 02:31:08,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-31 02:31:08,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:31:08,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 735 flow. Second operand has 8 states, 8 states have (on average 100.875) internal successors, (807), 8 states have internal predecessors, (807), 0 states have call successors, (0), 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 02:31:08,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:08,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:31:08,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:09,819 INFO L130 PetriNetUnfolder]: 13620/18549 cut-off events. [2023-08-31 02:31:09,819 INFO L131 PetriNetUnfolder]: For 116629/122375 co-relation queries the response was YES. [2023-08-31 02:31:09,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96364 conditions, 18549 events. 13620/18549 cut-off events. For 116629/122375 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 104631 event pairs, 1504 based on Foata normal form. 2887/21276 useless extension candidates. Maximal degree in co-relation 87643. Up to 8289 conditions per place. [2023-08-31 02:31:09,999 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 155 selfloop transitions, 16 changer transitions 0/178 dead transitions. [2023-08-31 02:31:10,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 178 transitions, 1933 flow [2023-08-31 02:31:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:31:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:31:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2023-08-31 02:31:10,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2023-08-31 02:31:10,001 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2023-08-31 02:31:10,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2023-08-31 02:31:10,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:10,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2023-08-31 02:31:10,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:10,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:10,005 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:10,005 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 735 flow. Second operand 5 states and 555 transitions. [2023-08-31 02:31:10,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 178 transitions, 1933 flow [2023-08-31 02:31:10,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 178 transitions, 1899 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-31 02:31:10,342 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 777 flow [2023-08-31 02:31:10,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=777, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2023-08-31 02:31:10,343 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 63 predicate places. [2023-08-31 02:31:10,343 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 777 flow [2023-08-31 02:31:10,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 100.875) internal successors, (807), 8 states have internal predecessors, (807), 0 states have call successors, (0), 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 02:31:10,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:10,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:10,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 02:31:10,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:10,549 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 2 more)] === [2023-08-31 02:31:10,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:10,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1703650341, now seen corresponding path program 4 times [2023-08-31 02:31:10,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:10,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365265585] [2023-08-31 02:31:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:10,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:10,635 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 02:31:10,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:10,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365265585] [2023-08-31 02:31:10,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365265585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:31:10,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:31:10,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:31:10,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075235227] [2023-08-31 02:31:10,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:31:10,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:31:10,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:31:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:31:10,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-08-31 02:31:10,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 777 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 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 02:31:10,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:10,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-08-31 02:31:10,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:12,227 INFO L130 PetriNetUnfolder]: 13966/19130 cut-off events. [2023-08-31 02:31:12,227 INFO L131 PetriNetUnfolder]: For 140441/146439 co-relation queries the response was YES. [2023-08-31 02:31:12,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100921 conditions, 19130 events. 13966/19130 cut-off events. For 140441/146439 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 109510 event pairs, 3588 based on Foata normal form. 2911/21877 useless extension candidates. Maximal degree in co-relation 91788. Up to 10240 conditions per place. [2023-08-31 02:31:12,604 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 166 selfloop transitions, 17 changer transitions 2/192 dead transitions. [2023-08-31 02:31:12,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 192 transitions, 2089 flow [2023-08-31 02:31:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:31:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:31:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 569 transitions. [2023-08-31 02:31:12,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367924528301887 [2023-08-31 02:31:12,606 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 569 transitions. [2023-08-31 02:31:12,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 569 transitions. [2023-08-31 02:31:12,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:12,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 569 transitions. [2023-08-31 02:31:12,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 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 02:31:12,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:12,610 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:12,610 INFO L175 Difference]: Start difference. First operand has 101 places, 83 transitions, 777 flow. Second operand 5 states and 569 transitions. [2023-08-31 02:31:12,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 192 transitions, 2089 flow [2023-08-31 02:31:12,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 192 transitions, 2067 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 02:31:12,989 INFO L231 Difference]: Finished difference. Result has 106 places, 85 transitions, 837 flow [2023-08-31 02:31:12,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=837, PETRI_PLACES=106, PETRI_TRANSITIONS=85} [2023-08-31 02:31:12,990 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 68 predicate places. [2023-08-31 02:31:12,990 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 85 transitions, 837 flow [2023-08-31 02:31:12,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 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 02:31:12,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:12,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:12,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 02:31:12,990 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 2 more)] === [2023-08-31 02:31:12,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:12,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1101080746, now seen corresponding path program 5 times [2023-08-31 02:31:12,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:12,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344288715] [2023-08-31 02:31:12,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:12,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:13,062 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 02:31:13,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:13,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344288715] [2023-08-31 02:31:13,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344288715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:31:13,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:31:13,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:31:13,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936248462] [2023-08-31 02:31:13,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:31:13,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:31:13,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:31:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:31:13,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-31 02:31:13,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 85 transitions, 837 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:13,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:13,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-31 02:31:13,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:14,485 INFO L130 PetriNetUnfolder]: 13782/18946 cut-off events. [2023-08-31 02:31:14,485 INFO L131 PetriNetUnfolder]: For 144705/150703 co-relation queries the response was YES. [2023-08-31 02:31:14,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104440 conditions, 18946 events. 13782/18946 cut-off events. For 144705/150703 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 109100 event pairs, 3110 based on Foata normal form. 3003/21785 useless extension candidates. Maximal degree in co-relation 94992. Up to 8406 conditions per place. [2023-08-31 02:31:14,731 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 161 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2023-08-31 02:31:14,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 2056 flow [2023-08-31 02:31:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:31:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:31:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 569 transitions. [2023-08-31 02:31:14,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367924528301887 [2023-08-31 02:31:14,734 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 569 transitions. [2023-08-31 02:31:14,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 569 transitions. [2023-08-31 02:31:14,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:14,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 569 transitions. [2023-08-31 02:31:14,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 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 02:31:14,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:14,738 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:14,738 INFO L175 Difference]: Start difference. First operand has 106 places, 85 transitions, 837 flow. Second operand 5 states and 569 transitions. [2023-08-31 02:31:14,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 2056 flow [2023-08-31 02:31:15,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 187 transitions, 2032 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-31 02:31:15,290 INFO L231 Difference]: Finished difference. Result has 110 places, 86 transitions, 870 flow [2023-08-31 02:31:15,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=870, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2023-08-31 02:31:15,291 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 72 predicate places. [2023-08-31 02:31:15,291 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 870 flow [2023-08-31 02:31:15,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:15,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:15,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:15,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 02:31:15,292 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 2 more)] === [2023-08-31 02:31:15,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1916988810, now seen corresponding path program 6 times [2023-08-31 02:31:15,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:15,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429965439] [2023-08-31 02:31:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:15,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:15,358 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 02:31:15,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:15,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429965439] [2023-08-31 02:31:15,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429965439] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:31:15,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:31:15,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:31:15,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663545378] [2023-08-31 02:31:15,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:31:15,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:31:15,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:31:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:31:15,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-31 02:31:15,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 870 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:15,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:15,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-31 02:31:15,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:17,000 INFO L130 PetriNetUnfolder]: 12572/17218 cut-off events. [2023-08-31 02:31:17,000 INFO L131 PetriNetUnfolder]: For 144675/150095 co-relation queries the response was YES. [2023-08-31 02:31:17,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96545 conditions, 17218 events. 12572/17218 cut-off events. For 144675/150095 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 97225 event pairs, 3226 based on Foata normal form. 2755/19817 useless extension candidates. Maximal degree in co-relation 87804. Up to 9096 conditions per place. [2023-08-31 02:31:17,420 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 177 selfloop transitions, 22 changer transitions 4/210 dead transitions. [2023-08-31 02:31:17,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 210 transitions, 2349 flow [2023-08-31 02:31:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:31:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:31:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 674 transitions. [2023-08-31 02:31:17,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529874213836478 [2023-08-31 02:31:17,423 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 674 transitions. [2023-08-31 02:31:17,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 674 transitions. [2023-08-31 02:31:17,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:17,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 674 transitions. [2023-08-31 02:31:17,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.33333333333333) internal successors, (674), 6 states have internal predecessors, (674), 0 states have call successors, (0), 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 02:31:17,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 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 02:31:17,428 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 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 02:31:17,428 INFO L175 Difference]: Start difference. First operand has 110 places, 86 transitions, 870 flow. Second operand 6 states and 674 transitions. [2023-08-31 02:31:17,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 210 transitions, 2349 flow [2023-08-31 02:31:17,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 210 transitions, 2308 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 02:31:17,945 INFO L231 Difference]: Finished difference. Result has 113 places, 89 transitions, 926 flow [2023-08-31 02:31:17,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=926, PETRI_PLACES=113, PETRI_TRANSITIONS=89} [2023-08-31 02:31:17,946 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2023-08-31 02:31:17,946 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 89 transitions, 926 flow [2023-08-31 02:31:17,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:17,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:17,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:17,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 02:31:17,947 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 2 more)] === [2023-08-31 02:31:17,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:17,948 INFO L85 PathProgramCache]: Analyzing trace with hash -834954938, now seen corresponding path program 5 times [2023-08-31 02:31:17,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:17,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459249421] [2023-08-31 02:31:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:17,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:18,007 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 02:31:18,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:18,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459249421] [2023-08-31 02:31:18,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459249421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:31:18,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:31:18,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:31:18,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899483045] [2023-08-31 02:31:18,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:31:18,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:31:18,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:18,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:31:18,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:31:18,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-31 02:31:18,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 89 transitions, 926 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:18,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:18,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-31 02:31:18,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:19,490 INFO L130 PetriNetUnfolder]: 11478/15699 cut-off events. [2023-08-31 02:31:19,490 INFO L131 PetriNetUnfolder]: For 158993/165969 co-relation queries the response was YES. [2023-08-31 02:31:19,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88786 conditions, 15699 events. 11478/15699 cut-off events. For 158993/165969 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 90292 event pairs, 2724 based on Foata normal form. 2978/18424 useless extension candidates. Maximal degree in co-relation 80026. Up to 8044 conditions per place. [2023-08-31 02:31:19,624 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 192 selfloop transitions, 22 changer transitions 14/236 dead transitions. [2023-08-31 02:31:19,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 236 transitions, 2900 flow [2023-08-31 02:31:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:31:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:31:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 678 transitions. [2023-08-31 02:31:19,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330188679245284 [2023-08-31 02:31:19,627 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 678 transitions. [2023-08-31 02:31:19,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 678 transitions. [2023-08-31 02:31:19,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:19,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 678 transitions. [2023-08-31 02:31:19,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 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 02:31:19,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 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 02:31:19,630 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 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 02:31:19,630 INFO L175 Difference]: Start difference. First operand has 113 places, 89 transitions, 926 flow. Second operand 6 states and 678 transitions. [2023-08-31 02:31:19,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 236 transitions, 2900 flow [2023-08-31 02:31:20,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 236 transitions, 2681 flow, removed 68 selfloop flow, removed 4 redundant places. [2023-08-31 02:31:20,025 INFO L231 Difference]: Finished difference. Result has 116 places, 93 transitions, 983 flow [2023-08-31 02:31:20,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=983, PETRI_PLACES=116, PETRI_TRANSITIONS=93} [2023-08-31 02:31:20,025 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 78 predicate places. [2023-08-31 02:31:20,026 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 93 transitions, 983 flow [2023-08-31 02:31:20,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:20,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:20,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:20,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 02:31:20,026 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 2 more)] === [2023-08-31 02:31:20,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:20,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1962537474, now seen corresponding path program 6 times [2023-08-31 02:31:20,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:20,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374230007] [2023-08-31 02:31:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:20,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:20,094 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 02:31:20,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:20,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374230007] [2023-08-31 02:31:20,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374230007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:31:20,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:31:20,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:31:20,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838532749] [2023-08-31 02:31:20,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:31:20,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:31:20,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:20,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:31:20,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:31:20,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-31 02:31:20,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 93 transitions, 983 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:20,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:20,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-31 02:31:20,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:21,323 INFO L130 PetriNetUnfolder]: 10594/14533 cut-off events. [2023-08-31 02:31:21,324 INFO L131 PetriNetUnfolder]: For 149934/156027 co-relation queries the response was YES. [2023-08-31 02:31:21,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84105 conditions, 14533 events. 10594/14533 cut-off events. For 149934/156027 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 81784 event pairs, 2384 based on Foata normal form. 2529/16860 useless extension candidates. Maximal degree in co-relation 75793. Up to 6316 conditions per place. [2023-08-31 02:31:21,484 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 180 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2023-08-31 02:31:21,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 207 transitions, 2457 flow [2023-08-31 02:31:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:31:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:31:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 567 transitions. [2023-08-31 02:31:21,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349056603773585 [2023-08-31 02:31:21,487 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 567 transitions. [2023-08-31 02:31:21,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 567 transitions. [2023-08-31 02:31:21,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:21,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 567 transitions. [2023-08-31 02:31:21,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 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 02:31:21,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:21,490 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 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 02:31:21,490 INFO L175 Difference]: Start difference. First operand has 116 places, 93 transitions, 983 flow. Second operand 5 states and 567 transitions. [2023-08-31 02:31:21,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 207 transitions, 2457 flow [2023-08-31 02:31:21,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 207 transitions, 2394 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-08-31 02:31:21,954 INFO L231 Difference]: Finished difference. Result has 118 places, 94 transitions, 990 flow [2023-08-31 02:31:21,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=990, PETRI_PLACES=118, PETRI_TRANSITIONS=94} [2023-08-31 02:31:21,955 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-08-31 02:31:21,955 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 94 transitions, 990 flow [2023-08-31 02:31:21,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 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 02:31:21,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:21,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:21,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 02:31:21,956 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 2 more)] === [2023-08-31 02:31:21,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:21,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1846128017, now seen corresponding path program 1 times [2023-08-31 02:31:21,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:21,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449239803] [2023-08-31 02:31:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:21,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:31:22,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:22,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449239803] [2023-08-31 02:31:22,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449239803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:31:22,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:31:22,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 02:31:22,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080955645] [2023-08-31 02:31:22,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:31:22,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:31:22,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:22,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:31:22,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:31:22,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 212 [2023-08-31 02:31:22,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 94 transitions, 990 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 02:31:22,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:22,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 212 [2023-08-31 02:31:22,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:22,850 INFO L130 PetriNetUnfolder]: 6080/8552 cut-off events. [2023-08-31 02:31:22,850 INFO L131 PetriNetUnfolder]: For 104356/111588 co-relation queries the response was YES. [2023-08-31 02:31:22,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49938 conditions, 8552 events. 6080/8552 cut-off events. For 104356/111588 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 49692 event pairs, 2052 based on Foata normal form. 3234/11552 useless extension candidates. Maximal degree in co-relation 46225. Up to 5745 conditions per place. [2023-08-31 02:31:22,910 INFO L137 encePairwiseOnDemand]: 209/212 looper letters, 80 selfloop transitions, 10 changer transitions 15/119 dead transitions. [2023-08-31 02:31:22,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 1359 flow [2023-08-31 02:31:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:31:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:31:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-31 02:31:22,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738993710691824 [2023-08-31 02:31:22,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-31 02:31:22,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-31 02:31:22,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:22,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-31 02:31:22,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 02:31:22,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 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 02:31:22,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 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 02:31:22,914 INFO L175 Difference]: Start difference. First operand has 118 places, 94 transitions, 990 flow. Second operand 3 states and 365 transitions. [2023-08-31 02:31:22,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 1359 flow [2023-08-31 02:31:23,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 1316 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-31 02:31:23,084 INFO L231 Difference]: Finished difference. Result has 118 places, 83 transitions, 869 flow [2023-08-31 02:31:23,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=869, PETRI_PLACES=118, PETRI_TRANSITIONS=83} [2023-08-31 02:31:23,084 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-08-31 02:31:23,084 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 83 transitions, 869 flow [2023-08-31 02:31:23,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 02:31:23,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:23,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:23,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 02:31:23,085 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 2 more)] === [2023-08-31 02:31:23,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1030320933, now seen corresponding path program 1 times [2023-08-31 02:31:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:23,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274202624] [2023-08-31 02:31:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:23,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:23,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:23,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274202624] [2023-08-31 02:31:23,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274202624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:23,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132926959] [2023-08-31 02:31:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:23,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:23,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:23,205 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 02:31:23,214 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 02:31:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:23,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 02:31:23,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:23,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:31:23,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132926959] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:23,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:23,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-31 02:31:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34474798] [2023-08-31 02:31:23,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:23,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:31:23,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:31:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:31:23,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 212 [2023-08-31 02:31:23,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 83 transitions, 869 flow. Second operand has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:23,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:23,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 212 [2023-08-31 02:31:23,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:24,957 INFO L130 PetriNetUnfolder]: 11144/15339 cut-off events. [2023-08-31 02:31:24,958 INFO L131 PetriNetUnfolder]: For 142210/151798 co-relation queries the response was YES. [2023-08-31 02:31:25,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83356 conditions, 15339 events. 11144/15339 cut-off events. For 142210/151798 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 86220 event pairs, 1030 based on Foata normal form. 4585/19766 useless extension candidates. Maximal degree in co-relation 82420. Up to 8061 conditions per place. [2023-08-31 02:31:25,076 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 163 selfloop transitions, 83 changer transitions 5/265 dead transitions. [2023-08-31 02:31:25,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 265 transitions, 2815 flow [2023-08-31 02:31:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:31:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:31:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 863 transitions. [2023-08-31 02:31:25,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815363881401617 [2023-08-31 02:31:25,078 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 863 transitions. [2023-08-31 02:31:25,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 863 transitions. [2023-08-31 02:31:25,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:25,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 863 transitions. [2023-08-31 02:31:25,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 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 02:31:25,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 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 02:31:25,081 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 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 02:31:25,081 INFO L175 Difference]: Start difference. First operand has 118 places, 83 transitions, 869 flow. Second operand 7 states and 863 transitions. [2023-08-31 02:31:25,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 265 transitions, 2815 flow [2023-08-31 02:31:25,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 265 transitions, 2738 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-08-31 02:31:25,391 INFO L231 Difference]: Finished difference. Result has 111 places, 150 transitions, 1877 flow [2023-08-31 02:31:25,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1877, PETRI_PLACES=111, PETRI_TRANSITIONS=150} [2023-08-31 02:31:25,392 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 73 predicate places. [2023-08-31 02:31:25,392 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 150 transitions, 1877 flow [2023-08-31 02:31:25,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:25,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:25,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:25,399 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 02:31:25,593 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,SelfDestructingSolverStorable21 [2023-08-31 02:31:25,593 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:31:25,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1938151797, now seen corresponding path program 2 times [2023-08-31 02:31:25,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:25,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557065684] [2023-08-31 02:31:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:25,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:25,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557065684] [2023-08-31 02:31:25,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557065684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830437142] [2023-08-31 02:31:25,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:31:25,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:25,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:25,737 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 02:31:25,739 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 02:31:25,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:31:25,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:25,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 02:31:25,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:25,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:26,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830437142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:26,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:26,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-31 02:31:26,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539847789] [2023-08-31 02:31:26,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:26,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:31:26,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:26,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:31:26,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:31:26,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 212 [2023-08-31 02:31:26,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 150 transitions, 1877 flow. Second operand has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:26,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:26,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 212 [2023-08-31 02:31:26,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:28,001 INFO L130 PetriNetUnfolder]: 16518/22700 cut-off events. [2023-08-31 02:31:28,002 INFO L131 PetriNetUnfolder]: For 224549/237152 co-relation queries the response was YES. [2023-08-31 02:31:28,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131803 conditions, 22700 events. 16518/22700 cut-off events. For 224549/237152 co-relation queries the response was YES. Maximal size of possible extension queue 1280. Compared 133422 event pairs, 2818 based on Foata normal form. 5149/27700 useless extension candidates. Maximal degree in co-relation 115802. Up to 16448 conditions per place. [2023-08-31 02:31:28,269 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 235 selfloop transitions, 79 changer transitions 5/333 dead transitions. [2023-08-31 02:31:28,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 333 transitions, 4176 flow [2023-08-31 02:31:28,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:31:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:31:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 859 transitions. [2023-08-31 02:31:28,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788409703504043 [2023-08-31 02:31:28,271 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 859 transitions. [2023-08-31 02:31:28,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 859 transitions. [2023-08-31 02:31:28,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:28,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 859 transitions. [2023-08-31 02:31:28,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 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 02:31:28,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 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 02:31:28,275 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 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 02:31:28,275 INFO L175 Difference]: Start difference. First operand has 111 places, 150 transitions, 1877 flow. Second operand 7 states and 859 transitions. [2023-08-31 02:31:28,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 333 transitions, 4176 flow [2023-08-31 02:31:28,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 333 transitions, 3970 flow, removed 103 selfloop flow, removed 0 redundant places. [2023-08-31 02:31:28,936 INFO L231 Difference]: Finished difference. Result has 120 places, 222 transitions, 2956 flow [2023-08-31 02:31:28,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2956, PETRI_PLACES=120, PETRI_TRANSITIONS=222} [2023-08-31 02:31:28,936 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 82 predicate places. [2023-08-31 02:31:28,937 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 222 transitions, 2956 flow [2023-08-31 02:31:28,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:28,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:28,937 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:28,942 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 02:31:29,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:29,138 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:31:29,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:29,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1252895162, now seen corresponding path program 3 times [2023-08-31 02:31:29,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:29,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063326246] [2023-08-31 02:31:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:29,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:29,214 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 02:31:29,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:29,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063326246] [2023-08-31 02:31:29,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063326246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:29,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592555897] [2023-08-31 02:31:29,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:31:29,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:29,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:29,219 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 02:31:29,247 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 02:31:29,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:31:29,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:29,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:29,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:29,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:29,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592555897] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:29,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:29,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-31 02:31:29,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322130212] [2023-08-31 02:31:29,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:29,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:31:29,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:29,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:31:29,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-31 02:31:29,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:31:29,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 222 transitions, 2956 flow. Second operand has 11 states, 11 states have (on average 100.0909090909091) internal successors, (1101), 11 states have internal predecessors, (1101), 0 states have call successors, (0), 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 02:31:29,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:29,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:31:29,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:33,635 INFO L130 PetriNetUnfolder]: 24378/33563 cut-off events. [2023-08-31 02:31:33,635 INFO L131 PetriNetUnfolder]: For 352237/367754 co-relation queries the response was YES. [2023-08-31 02:31:34,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195633 conditions, 33563 events. 24378/33563 cut-off events. For 352237/367754 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 206013 event pairs, 4662 based on Foata normal form. 6301/39773 useless extension candidates. Maximal degree in co-relation 178805. Up to 17876 conditions per place. [2023-08-31 02:31:34,159 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 424 selfloop transitions, 39 changer transitions 0/471 dead transitions. [2023-08-31 02:31:34,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 471 transitions, 6731 flow [2023-08-31 02:31:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:31:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:31:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 786 transitions. [2023-08-31 02:31:34,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296495956873315 [2023-08-31 02:31:34,161 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 786 transitions. [2023-08-31 02:31:34,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 786 transitions. [2023-08-31 02:31:34,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:34,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 786 transitions. [2023-08-31 02:31:34,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.28571428571429) internal successors, (786), 7 states have internal predecessors, (786), 0 states have call successors, (0), 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 02:31:34,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 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 02:31:34,164 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 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 02:31:34,165 INFO L175 Difference]: Start difference. First operand has 120 places, 222 transitions, 2956 flow. Second operand 7 states and 786 transitions. [2023-08-31 02:31:34,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 471 transitions, 6731 flow [2023-08-31 02:31:35,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 471 transitions, 6219 flow, removed 256 selfloop flow, removed 0 redundant places. [2023-08-31 02:31:35,492 INFO L231 Difference]: Finished difference. Result has 130 places, 245 transitions, 3052 flow [2023-08-31 02:31:35,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3052, PETRI_PLACES=130, PETRI_TRANSITIONS=245} [2023-08-31 02:31:35,493 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 92 predicate places. [2023-08-31 02:31:35,493 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 245 transitions, 3052 flow [2023-08-31 02:31:35,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 100.0909090909091) internal successors, (1101), 11 states have internal predecessors, (1101), 0 states have call successors, (0), 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 02:31:35,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:35,494 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:35,499 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 02:31:35,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-31 02:31:35,694 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:31:35,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:35,695 INFO L85 PathProgramCache]: Analyzing trace with hash -563281195, now seen corresponding path program 4 times [2023-08-31 02:31:35,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:35,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698318261] [2023-08-31 02:31:35,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:35,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:35,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:35,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698318261] [2023-08-31 02:31:35,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698318261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:35,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844511404] [2023-08-31 02:31:35,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:31:35,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:35,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:35,773 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 02:31:35,777 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 02:31:35,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:31:35,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:35,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:35,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:35,910 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 02:31:35,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:35,942 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 02:31:35,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844511404] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:35,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:35,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-31 02:31:35,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412285965] [2023-08-31 02:31:35,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:31:35,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:31:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-31 02:31:35,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:31:35,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 245 transitions, 3052 flow. Second operand has 11 states, 11 states have (on average 100.18181818181819) internal successors, (1102), 11 states have internal predecessors, (1102), 0 states have call successors, (0), 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 02:31:35,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:35,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:31:35,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:40,280 INFO L130 PetriNetUnfolder]: 25169/34809 cut-off events. [2023-08-31 02:31:40,280 INFO L131 PetriNetUnfolder]: For 399996/414714 co-relation queries the response was YES. [2023-08-31 02:31:40,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203217 conditions, 34809 events. 25169/34809 cut-off events. For 399996/414714 co-relation queries the response was YES. Maximal size of possible extension queue 1873. Compared 220721 event pairs, 4386 based on Foata normal form. 6104/40636 useless extension candidates. Maximal degree in co-relation 184960. Up to 16345 conditions per place. [2023-08-31 02:31:40,703 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 721 selfloop transitions, 54 changer transitions 34/817 dead transitions. [2023-08-31 02:31:40,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 817 transitions, 11389 flow [2023-08-31 02:31:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:31:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:31:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1215 transitions. [2023-08-31 02:31:40,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210120068610634 [2023-08-31 02:31:40,705 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1215 transitions. [2023-08-31 02:31:40,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1215 transitions. [2023-08-31 02:31:40,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:40,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1215 transitions. [2023-08-31 02:31:40,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 110.45454545454545) internal successors, (1215), 11 states have internal predecessors, (1215), 0 states have call successors, (0), 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 02:31:40,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 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 02:31:40,709 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 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 02:31:40,709 INFO L175 Difference]: Start difference. First operand has 130 places, 245 transitions, 3052 flow. Second operand 11 states and 1215 transitions. [2023-08-31 02:31:40,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 817 transitions, 11389 flow [2023-08-31 02:31:41,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 817 transitions, 11302 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-08-31 02:31:41,957 INFO L231 Difference]: Finished difference. Result has 143 places, 273 transitions, 3501 flow [2023-08-31 02:31:41,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3501, PETRI_PLACES=143, PETRI_TRANSITIONS=273} [2023-08-31 02:31:41,958 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 105 predicate places. [2023-08-31 02:31:41,958 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 273 transitions, 3501 flow [2023-08-31 02:31:41,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 100.18181818181819) internal successors, (1102), 11 states have internal predecessors, (1102), 0 states have call successors, (0), 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 02:31:41,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:41,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:41,963 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 02:31:42,159 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,SelfDestructingSolverStorable24 [2023-08-31 02:31:42,160 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:31:42,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1667997905, now seen corresponding path program 5 times [2023-08-31 02:31:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:42,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615766872] [2023-08-31 02:31:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:42,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:42,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615766872] [2023-08-31 02:31:42,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615766872] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047446377] [2023-08-31 02:31:42,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:31:42,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:42,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:42,230 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 02:31:42,252 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 02:31:42,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:31:42,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:42,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:42,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:42,390 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 02:31:42,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:42,428 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 02:31:42,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047446377] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:42,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:42,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 02:31:42,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500553272] [2023-08-31 02:31:42,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:42,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:31:42,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:31:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:31:42,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:31:42,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 273 transitions, 3501 flow. Second operand has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 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 02:31:42,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:42,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:31:42,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:50,610 INFO L130 PetriNetUnfolder]: 45403/62726 cut-off events. [2023-08-31 02:31:50,610 INFO L131 PetriNetUnfolder]: For 689282/716371 co-relation queries the response was YES. [2023-08-31 02:31:51,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379482 conditions, 62726 events. 45403/62726 cut-off events. For 689282/716371 co-relation queries the response was YES. Maximal size of possible extension queue 3089. Compared 416038 event pairs, 10097 based on Foata normal form. 11614/74086 useless extension candidates. Maximal degree in co-relation 332966. Up to 23541 conditions per place. [2023-08-31 02:31:51,645 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 740 selfloop transitions, 152 changer transitions 0/900 dead transitions. [2023-08-31 02:31:51,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 900 transitions, 12321 flow [2023-08-31 02:31:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 02:31:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 02:31:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1459 transitions. [2023-08-31 02:31:51,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5293904208998549 [2023-08-31 02:31:51,647 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1459 transitions. [2023-08-31 02:31:51,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1459 transitions. [2023-08-31 02:31:51,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:51,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1459 transitions. [2023-08-31 02:31:51,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 112.23076923076923) internal successors, (1459), 13 states have internal predecessors, (1459), 0 states have call successors, (0), 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 02:31:51,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 212.0) internal successors, (2968), 14 states have internal predecessors, (2968), 0 states have call successors, (0), 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 02:31:51,651 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 212.0) internal successors, (2968), 14 states have internal predecessors, (2968), 0 states have call successors, (0), 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 02:31:51,651 INFO L175 Difference]: Start difference. First operand has 143 places, 273 transitions, 3501 flow. Second operand 13 states and 1459 transitions. [2023-08-31 02:31:51,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 900 transitions, 12321 flow [2023-08-31 02:31:56,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 900 transitions, 12068 flow, removed 87 selfloop flow, removed 1 redundant places. [2023-08-31 02:31:56,396 INFO L231 Difference]: Finished difference. Result has 161 places, 372 transitions, 5050 flow [2023-08-31 02:31:56,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5050, PETRI_PLACES=161, PETRI_TRANSITIONS=372} [2023-08-31 02:31:56,397 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 123 predicate places. [2023-08-31 02:31:56,397 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 372 transitions, 5050 flow [2023-08-31 02:31:56,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 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 02:31:56,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:56,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:56,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 02:31:56,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-31 02:31:56,598 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:31:56,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:56,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2081496792, now seen corresponding path program 6 times [2023-08-31 02:31:56,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:56,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422912420] [2023-08-31 02:31:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:56,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:56,675 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 02:31:56,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:56,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422912420] [2023-08-31 02:31:56,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422912420] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:56,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734888175] [2023-08-31 02:31:56,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:31:56,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:56,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:56,677 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:31:56,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 02:31:56,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 02:31:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:56,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:56,906 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 02:31:56,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734888175] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:56,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:56,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-31 02:31:56,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628089073] [2023-08-31 02:31:56,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:56,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:31:56,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:56,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:31:56,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:31:56,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:31:56,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 372 transitions, 5050 flow. Second operand has 13 states, 13 states have (on average 100.15384615384616) internal successors, (1302), 13 states have internal predecessors, (1302), 0 states have call successors, (0), 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 02:31:56,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:56,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:31:56,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:32:07,693 INFO L130 PetriNetUnfolder]: 55320/75974 cut-off events. [2023-08-31 02:32:07,693 INFO L131 PetriNetUnfolder]: For 974343/1006837 co-relation queries the response was YES. [2023-08-31 02:32:08,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481478 conditions, 75974 events. 55320/75974 cut-off events. For 974343/1006837 co-relation queries the response was YES. Maximal size of possible extension queue 3587. Compared 506851 event pairs, 13827 based on Foata normal form. 15177/90969 useless extension candidates. Maximal degree in co-relation 422526. Up to 57946 conditions per place. [2023-08-31 02:32:09,066 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 691 selfloop transitions, 103 changer transitions 0/802 dead transitions. [2023-08-31 02:32:09,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 802 transitions, 11760 flow [2023-08-31 02:32:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:32:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:32:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1222 transitions. [2023-08-31 02:32:09,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5240137221269296 [2023-08-31 02:32:09,068 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1222 transitions. [2023-08-31 02:32:09,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1222 transitions. [2023-08-31 02:32:09,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:32:09,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1222 transitions. [2023-08-31 02:32:09,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 111.0909090909091) internal successors, (1222), 11 states have internal predecessors, (1222), 0 states have call successors, (0), 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 02:32:09,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 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 02:32:09,071 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 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 02:32:09,071 INFO L175 Difference]: Start difference. First operand has 161 places, 372 transitions, 5050 flow. Second operand 11 states and 1222 transitions. [2023-08-31 02:32:09,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 802 transitions, 11760 flow [2023-08-31 02:32:16,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 802 transitions, 11424 flow, removed 99 selfloop flow, removed 5 redundant places. [2023-08-31 02:32:16,511 INFO L231 Difference]: Finished difference. Result has 171 places, 427 transitions, 5892 flow [2023-08-31 02:32:16,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=4749, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5892, PETRI_PLACES=171, PETRI_TRANSITIONS=427} [2023-08-31 02:32:16,511 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 133 predicate places. [2023-08-31 02:32:16,511 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 427 transitions, 5892 flow [2023-08-31 02:32:16,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.15384615384616) internal successors, (1302), 13 states have internal predecessors, (1302), 0 states have call successors, (0), 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 02:32:16,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:32:16,512 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:32:16,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 02:32:16,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 02:32:16,712 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:32:16,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:32:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash 219334723, now seen corresponding path program 7 times [2023-08-31 02:32:16,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:32:16,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130925653] [2023-08-31 02:32:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:32:16,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:32:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:32:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:32:16,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:32:16,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130925653] [2023-08-31 02:32:16,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130925653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:32:16,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637479167] [2023-08-31 02:32:16,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:32:16,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:32:16,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:32:16,781 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:32:16,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 02:32:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:32:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:32:16,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:32:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:32:16,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:32:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:32:16,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637479167] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:32:16,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:32:16,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 02:32:16,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928681004] [2023-08-31 02:32:16,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:32:16,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:32:16,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:32:16,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:32:16,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:32:17,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:32:17,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 427 transitions, 5892 flow. Second operand has 12 states, 12 states have (on average 99.83333333333333) internal successors, (1198), 12 states have internal predecessors, (1198), 0 states have call successors, (0), 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 02:32:17,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:32:17,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:32:17,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:32:30,461 INFO L130 PetriNetUnfolder]: 61521/85623 cut-off events. [2023-08-31 02:32:30,461 INFO L131 PetriNetUnfolder]: For 1297055/1334172 co-relation queries the response was YES. [2023-08-31 02:32:31,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573590 conditions, 85623 events. 61521/85623 cut-off events. For 1297055/1334172 co-relation queries the response was YES. Maximal size of possible extension queue 4184. Compared 604658 event pairs, 10504 based on Foata normal form. 16393/101726 useless extension candidates. Maximal degree in co-relation 503489. Up to 29926 conditions per place. [2023-08-31 02:32:31,828 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1284 selfloop transitions, 171 changer transitions 13/1476 dead transitions. [2023-08-31 02:32:31,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1476 transitions, 21403 flow [2023-08-31 02:32:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 02:32:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 02:32:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1996 transitions. [2023-08-31 02:32:31,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230607966457023 [2023-08-31 02:32:31,830 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1996 transitions. [2023-08-31 02:32:31,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1996 transitions. [2023-08-31 02:32:31,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:32:31,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1996 transitions. [2023-08-31 02:32:31,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 110.88888888888889) internal successors, (1996), 18 states have internal predecessors, (1996), 0 states have call successors, (0), 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 02:32:31,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 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 02:32:31,836 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 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 02:32:31,837 INFO L175 Difference]: Start difference. First operand has 171 places, 427 transitions, 5892 flow. Second operand 18 states and 1996 transitions. [2023-08-31 02:32:31,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1476 transitions, 21403 flow [2023-08-31 02:32:43,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 1476 transitions, 20887 flow, removed 245 selfloop flow, removed 2 redundant places. [2023-08-31 02:32:43,054 INFO L231 Difference]: Finished difference. Result has 192 places, 492 transitions, 6725 flow [2023-08-31 02:32:43,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=5402, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6725, PETRI_PLACES=192, PETRI_TRANSITIONS=492} [2023-08-31 02:32:43,055 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 154 predicate places. [2023-08-31 02:32:43,055 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 492 transitions, 6725 flow [2023-08-31 02:32:43,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.83333333333333) internal successors, (1198), 12 states have internal predecessors, (1198), 0 states have call successors, (0), 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 02:32:43,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:32:43,056 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:32:43,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-31 02:32:43,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:32:43,261 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:32:43,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:32:43,262 INFO L85 PathProgramCache]: Analyzing trace with hash -953766959, now seen corresponding path program 8 times [2023-08-31 02:32:43,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:32:43,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912244205] [2023-08-31 02:32:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:32:43,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:32:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:32:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:32:43,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:32:43,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912244205] [2023-08-31 02:32:43,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912244205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:32:43,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857561713] [2023-08-31 02:32:43,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:32:43,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:32:43,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:32:43,349 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:32:43,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 02:32:43,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:32:43,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:32:43,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:32:43,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:32:43,530 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 02:32:43,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:32:43,564 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 02:32:43,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857561713] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:32:43,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:32:43,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-31 02:32:43,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229126609] [2023-08-31 02:32:43,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:32:43,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:32:43,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:32:43,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:32:43,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:32:43,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:32:43,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 492 transitions, 6725 flow. Second operand has 13 states, 13 states have (on average 100.3076923076923) internal successors, (1304), 13 states have internal predecessors, (1304), 0 states have call successors, (0), 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 02:32:43,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:32:43,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:32:43,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:32:57,500 INFO L130 PetriNetUnfolder]: 60289/83939 cut-off events. [2023-08-31 02:32:57,500 INFO L131 PetriNetUnfolder]: For 1330333/1365514 co-relation queries the response was YES. [2023-08-31 02:32:58,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566957 conditions, 83939 events. 60289/83939 cut-off events. For 1330333/1365514 co-relation queries the response was YES. Maximal size of possible extension queue 4059. Compared 591297 event pairs, 13863 based on Foata normal form. 15035/98547 useless extension candidates. Maximal degree in co-relation 546224. Up to 40901 conditions per place. [2023-08-31 02:32:59,205 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1088 selfloop transitions, 156 changer transitions 52/1304 dead transitions. [2023-08-31 02:32:59,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 1304 transitions, 18926 flow [2023-08-31 02:32:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 02:32:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 02:32:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1985 transitions. [2023-08-31 02:32:59,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201781970649895 [2023-08-31 02:32:59,207 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1985 transitions. [2023-08-31 02:32:59,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1985 transitions. [2023-08-31 02:32:59,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:32:59,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1985 transitions. [2023-08-31 02:32:59,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 110.27777777777777) internal successors, (1985), 18 states have internal predecessors, (1985), 0 states have call successors, (0), 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 02:32:59,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 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 02:32:59,214 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 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 02:32:59,214 INFO L175 Difference]: Start difference. First operand has 192 places, 492 transitions, 6725 flow. Second operand 18 states and 1985 transitions. [2023-08-31 02:32:59,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 1304 transitions, 18926 flow [2023-08-31 02:33:13,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 1304 transitions, 18628 flow, removed 96 selfloop flow, removed 6 redundant places. [2023-08-31 02:33:13,447 INFO L231 Difference]: Finished difference. Result has 205 places, 497 transitions, 6863 flow [2023-08-31 02:33:13,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=6431, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6863, PETRI_PLACES=205, PETRI_TRANSITIONS=497} [2023-08-31 02:33:13,448 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 167 predicate places. [2023-08-31 02:33:13,448 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 497 transitions, 6863 flow [2023-08-31 02:33:13,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.3076923076923) internal successors, (1304), 13 states have internal predecessors, (1304), 0 states have call successors, (0), 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 02:33:13,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:33:13,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:33:13,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 02:33:13,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 02:33:13,655 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:33:13,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:33:13,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1142683924, now seen corresponding path program 9 times [2023-08-31 02:33:13,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:33:13,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973596030] [2023-08-31 02:33:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:33:13,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:33:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:33:13,723 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 02:33:13,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:33:13,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973596030] [2023-08-31 02:33:13,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973596030] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:33:13,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208860798] [2023-08-31 02:33:13,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:33:13,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:33:13,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:33:13,725 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:33:13,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 02:33:13,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:33:13,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:33:13,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:33:13,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:33:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:33:13,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:33:13,977 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 02:33:13,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208860798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:33:13,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:33:13,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 02:33:13,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436561851] [2023-08-31 02:33:13,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:33:13,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:33:13,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:33:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:33:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:33:14,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:33:14,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 497 transitions, 6863 flow. Second operand has 12 states, 12 states have (on average 100.66666666666667) internal successors, (1208), 12 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:33:14,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:33:14,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:33:14,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:33:31,672 INFO L130 PetriNetUnfolder]: 75941/105716 cut-off events. [2023-08-31 02:33:31,673 INFO L131 PetriNetUnfolder]: For 1613808/1657279 co-relation queries the response was YES. [2023-08-31 02:33:33,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688507 conditions, 105716 events. 75941/105716 cut-off events. For 1613808/1657279 co-relation queries the response was YES. Maximal size of possible extension queue 4980. Compared 754196 event pairs, 15165 based on Foata normal form. 20393/125897 useless extension candidates. Maximal degree in co-relation 651103. Up to 55992 conditions per place. [2023-08-31 02:33:33,564 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 866 selfloop transitions, 211 changer transitions 0/1085 dead transitions. [2023-08-31 02:33:33,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 1085 transitions, 16068 flow [2023-08-31 02:33:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 02:33:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 02:33:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1565 transitions. [2023-08-31 02:33:33,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272911051212938 [2023-08-31 02:33:33,566 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1565 transitions. [2023-08-31 02:33:33,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1565 transitions. [2023-08-31 02:33:33,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:33:33,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1565 transitions. [2023-08-31 02:33:33,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 111.78571428571429) internal successors, (1565), 14 states have internal predecessors, (1565), 0 states have call successors, (0), 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 02:33:33,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 212.0) internal successors, (3180), 15 states have internal predecessors, (3180), 0 states have call successors, (0), 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 02:33:33,570 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 212.0) internal successors, (3180), 15 states have internal predecessors, (3180), 0 states have call successors, (0), 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 02:33:33,570 INFO L175 Difference]: Start difference. First operand has 205 places, 497 transitions, 6863 flow. Second operand 14 states and 1565 transitions. [2023-08-31 02:33:33,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 1085 transitions, 16068 flow [2023-08-31 02:33:50,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 1085 transitions, 15904 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-08-31 02:33:50,061 INFO L231 Difference]: Finished difference. Result has 213 places, 583 transitions, 8800 flow [2023-08-31 02:33:50,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=6715, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8800, PETRI_PLACES=213, PETRI_TRANSITIONS=583} [2023-08-31 02:33:50,062 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 175 predicate places. [2023-08-31 02:33:50,062 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 583 transitions, 8800 flow [2023-08-31 02:33:50,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 100.66666666666667) internal successors, (1208), 12 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:33:50,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:33:50,062 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:33:50,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 02:33:50,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:33:50,263 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:33:50,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:33:50,264 INFO L85 PathProgramCache]: Analyzing trace with hash -707100586, now seen corresponding path program 10 times [2023-08-31 02:33:50,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:33:50,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705822531] [2023-08-31 02:33:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:33:50,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:33:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:33:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:33:50,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:33:50,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705822531] [2023-08-31 02:33:50,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705822531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:33:50,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161495444] [2023-08-31 02:33:50,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:33:50,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:33:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:33:50,332 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:33:50,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 02:33:50,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:33:50,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:33:50,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:33:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:33:50,491 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 02:33:50,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:33:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:33:50,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161495444] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:33:50,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:33:50,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 02:33:50,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810836278] [2023-08-31 02:33:50,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:33:50,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:33:50,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:33:50,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:33:50,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:33:50,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:33:50,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 583 transitions, 8800 flow. Second operand has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 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 02:33:50,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:33:50,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:33:50,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:34:10,817 INFO L130 PetriNetUnfolder]: 79900/111345 cut-off events. [2023-08-31 02:34:10,817 INFO L131 PetriNetUnfolder]: For 1877284/1924794 co-relation queries the response was YES. [2023-08-31 02:34:12,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767209 conditions, 111345 events. 79900/111345 cut-off events. For 1877284/1924794 co-relation queries the response was YES. Maximal size of possible extension queue 5338. Compared 812453 event pairs, 4913 based on Foata normal form. 20623/131853 useless extension candidates. Maximal degree in co-relation 727022. Up to 30749 conditions per place. [2023-08-31 02:34:13,235 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1239 selfloop transitions, 313 changer transitions 19/1579 dead transitions. [2023-08-31 02:34:13,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1579 transitions, 24853 flow [2023-08-31 02:34:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 02:34:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 02:34:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2077 transitions. [2023-08-31 02:34:13,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156405163853028 [2023-08-31 02:34:13,238 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2077 transitions. [2023-08-31 02:34:13,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2077 transitions. [2023-08-31 02:34:13,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:34:13,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2077 transitions. [2023-08-31 02:34:13,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 109.3157894736842) internal successors, (2077), 19 states have internal predecessors, (2077), 0 states have call successors, (0), 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 02:34:13,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 212.0) internal successors, (4240), 20 states have internal predecessors, (4240), 0 states have call successors, (0), 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 02:34:13,243 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 212.0) internal successors, (4240), 20 states have internal predecessors, (4240), 0 states have call successors, (0), 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 02:34:13,244 INFO L175 Difference]: Start difference. First operand has 213 places, 583 transitions, 8800 flow. Second operand 19 states and 2077 transitions. [2023-08-31 02:34:13,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1579 transitions, 24853 flow [2023-08-31 02:34:43,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1579 transitions, 24077 flow, removed 293 selfloop flow, removed 9 redundant places. [2023-08-31 02:34:43,531 INFO L231 Difference]: Finished difference. Result has 227 places, 708 transitions, 11108 flow [2023-08-31 02:34:43,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11108, PETRI_PLACES=227, PETRI_TRANSITIONS=708} [2023-08-31 02:34:43,532 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 189 predicate places. [2023-08-31 02:34:43,533 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 708 transitions, 11108 flow [2023-08-31 02:34:43,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 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 02:34:43,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:34:43,533 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:34:43,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 02:34:43,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:34:43,737 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:34:43,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:34:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1904532894, now seen corresponding path program 11 times [2023-08-31 02:34:43,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:34:43,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103197974] [2023-08-31 02:34:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:34:43,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:34:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:34:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:34:43,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:34:43,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103197974] [2023-08-31 02:34:43,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103197974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:34:43,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433478869] [2023-08-31 02:34:43,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:34:43,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:34:43,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:34:43,804 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:34:43,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 02:34:43,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:34:43,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:34:43,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:34:43,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:34:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:34:43,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:34:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:34:44,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433478869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:34:44,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:34:44,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 02:34:44,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136029924] [2023-08-31 02:34:44,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:34:44,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:34:44,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:34:44,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:34:44,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:34:44,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:34:44,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 708 transitions, 11108 flow. Second operand has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 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 02:34:44,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:34:44,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:34:44,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:35:14,258 INFO L130 PetriNetUnfolder]: 104986/147241 cut-off events. [2023-08-31 02:35:14,258 INFO L131 PetriNetUnfolder]: For 2646723/2707605 co-relation queries the response was YES. [2023-08-31 02:35:16,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041467 conditions, 147241 events. 104986/147241 cut-off events. For 2646723/2707605 co-relation queries the response was YES. Maximal size of possible extension queue 6943. Compared 1119030 event pairs, 6087 based on Foata normal form. 27299/174445 useless extension candidates. Maximal degree in co-relation 946521. Up to 43024 conditions per place. [2023-08-31 02:35:17,237 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1557 selfloop transitions, 457 changer transitions 36/2058 dead transitions. [2023-08-31 02:35:17,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 2058 transitions, 32989 flow [2023-08-31 02:35:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 02:35:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 02:35:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2313 transitions. [2023-08-31 02:35:17,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195417789757413 [2023-08-31 02:35:17,240 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2313 transitions. [2023-08-31 02:35:17,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2313 transitions. [2023-08-31 02:35:17,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:35:17,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2313 transitions. [2023-08-31 02:35:17,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 0 states have call successors, (0), 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 02:35:17,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 212.0) internal successors, (4664), 22 states have internal predecessors, (4664), 0 states have call successors, (0), 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 02:35:17,247 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 212.0) internal successors, (4664), 22 states have internal predecessors, (4664), 0 states have call successors, (0), 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 02:35:17,248 INFO L175 Difference]: Start difference. First operand has 227 places, 708 transitions, 11108 flow. Second operand 21 states and 2313 transitions. [2023-08-31 02:35:17,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 2058 transitions, 32989 flow [2023-08-31 02:36:14,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 2058 transitions, 32333 flow, removed 255 selfloop flow, removed 10 redundant places. [2023-08-31 02:36:14,412 INFO L231 Difference]: Finished difference. Result has 246 places, 890 transitions, 15693 flow [2023-08-31 02:36:14,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=10582, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15693, PETRI_PLACES=246, PETRI_TRANSITIONS=890} [2023-08-31 02:36:14,413 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 208 predicate places. [2023-08-31 02:36:14,413 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 890 transitions, 15693 flow [2023-08-31 02:36:14,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 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 02:36:14,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:36:14,414 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:36:14,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 02:36:14,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:36:14,620 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:36:14,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:36:14,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1656990560, now seen corresponding path program 12 times [2023-08-31 02:36:14,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:36:14,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093271518] [2023-08-31 02:36:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:36:14,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:36:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:36:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:36:14,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:36:14,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093271518] [2023-08-31 02:36:14,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093271518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:36:14,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967671433] [2023-08-31 02:36:14,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:36:14,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:36:14,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:36:14,689 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:36:14,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 02:36:14,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:36:14,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:36:14,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:36:14,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:36:14,887 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 02:36:14,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:36:14,923 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 02:36:14,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967671433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:36:14,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:36:14,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 02:36:14,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273531202] [2023-08-31 02:36:14,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:36:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:36:14,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:36:14,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:36:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:36:14,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:36:14,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 890 transitions, 15693 flow. Second operand has 13 states, 13 states have (on average 99.84615384615384) internal successors, (1298), 13 states have internal predecessors, (1298), 0 states have call successors, (0), 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 02:36:14,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:36:14,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:36:14,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:36:56,900 INFO L130 PetriNetUnfolder]: 119992/168155 cut-off events. [2023-08-31 02:36:56,901 INFO L131 PetriNetUnfolder]: For 3573220/3640633 co-relation queries the response was YES. [2023-08-31 02:37:00,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238812 conditions, 168155 events. 119992/168155 cut-off events. For 3573220/3640633 co-relation queries the response was YES. Maximal size of possible extension queue 7694. Compared 1278622 event pairs, 24151 based on Foata normal form. 30719/198701 useless extension candidates. Maximal degree in co-relation 1204497. Up to 59696 conditions per place. [2023-08-31 02:37:00,986 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 1085 selfloop transitions, 623 changer transitions 0/1716 dead transitions. [2023-08-31 02:37:00,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1716 transitions, 30098 flow [2023-08-31 02:37:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 02:37:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 02:37:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1681 transitions. [2023-08-31 02:37:00,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286163522012579 [2023-08-31 02:37:00,989 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1681 transitions. [2023-08-31 02:37:00,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1681 transitions. [2023-08-31 02:37:00,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:37:00,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1681 transitions. [2023-08-31 02:37:00,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 112.06666666666666) internal successors, (1681), 15 states have internal predecessors, (1681), 0 states have call successors, (0), 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 02:37:00,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 212.0) internal successors, (3392), 16 states have internal predecessors, (3392), 0 states have call successors, (0), 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 02:37:00,994 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 212.0) internal successors, (3392), 16 states have internal predecessors, (3392), 0 states have call successors, (0), 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 02:37:00,994 INFO L175 Difference]: Start difference. First operand has 246 places, 890 transitions, 15693 flow. Second operand 15 states and 1681 transitions. [2023-08-31 02:37:00,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1716 transitions, 30098 flow [2023-08-31 02:40:39,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1716 transitions, 29389 flow, removed 323 selfloop flow, removed 5 redundant places. [2023-08-31 02:40:39,689 INFO L231 Difference]: Finished difference. Result has 260 places, 1048 transitions, 20168 flow [2023-08-31 02:40:39,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=14976, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=20168, PETRI_PLACES=260, PETRI_TRANSITIONS=1048} [2023-08-31 02:40:39,690 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 222 predicate places. [2023-08-31 02:40:39,690 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 1048 transitions, 20168 flow [2023-08-31 02:40:39,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 99.84615384615384) internal successors, (1298), 13 states have internal predecessors, (1298), 0 states have call successors, (0), 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 02:40:39,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:39,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:39,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:39,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:39,891 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:40:39,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1096448224, now seen corresponding path program 13 times [2023-08-31 02:40:39,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:39,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762213829] [2023-08-31 02:40:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:39,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:39,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:39,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762213829] [2023-08-31 02:40:39,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762213829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:39,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067129810] [2023-08-31 02:40:39,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:40:39,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:39,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:39,961 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:39,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 02:40:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:40,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:40:40,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:40,136 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 02:40:40,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:40,173 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 02:40:40,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067129810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:40,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:40,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 02:40:40,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226741528] [2023-08-31 02:40:40,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:40,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:40:40,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:40,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:40:40,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:40:40,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-31 02:40:40,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 1048 transitions, 20168 flow. Second operand has 15 states, 15 states have (on average 99.53333333333333) internal successors, (1493), 15 states have internal predecessors, (1493), 0 states have call successors, (0), 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 02:40:40,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:40,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-31 02:40:40,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:41:25,869 INFO L130 PetriNetUnfolder]: 124412/173892 cut-off events. [2023-08-31 02:41:25,869 INFO L131 PetriNetUnfolder]: For 3825811/3897963 co-relation queries the response was YES. [2023-08-31 02:41:29,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1327469 conditions, 173892 events. 124412/173892 cut-off events. For 3825811/3897963 co-relation queries the response was YES. Maximal size of possible extension queue 8165. Compared 1334616 event pairs, 8101 based on Foata normal form. 31835/205628 useless extension candidates. Maximal degree in co-relation 1312148. Up to 53618 conditions per place. [2023-08-31 02:41:30,389 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1611 selfloop transitions, 523 changer transitions 81/2223 dead transitions. [2023-08-31 02:41:30,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 2223 transitions, 39683 flow [2023-08-31 02:41:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 02:41:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 02:41:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2515 transitions. [2023-08-31 02:41:30,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515791632485644 [2023-08-31 02:41:30,392 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2515 transitions. [2023-08-31 02:41:30,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2515 transitions. [2023-08-31 02:41:30,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:41:30,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2515 transitions. [2023-08-31 02:41:30,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 109.34782608695652) internal successors, (2515), 23 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:30,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 212.0) internal successors, (5088), 24 states have internal predecessors, (5088), 0 states have call successors, (0), 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 02:41:30,408 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 212.0) internal successors, (5088), 24 states have internal predecessors, (5088), 0 states have call successors, (0), 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 02:41:30,408 INFO L175 Difference]: Start difference. First operand has 260 places, 1048 transitions, 20168 flow. Second operand 23 states and 2515 transitions. [2023-08-31 02:41:30,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 2223 transitions, 39683 flow Killed by 15