./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-commit-2.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 f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:18:04,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:18:04,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:18:04,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:18:04,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:18:04,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:18:04,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:18:04,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:18:04,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:18:04,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:18:04,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:18:04,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:18:04,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:18:04,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:18:04,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:18:04,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:18:04,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:18:04,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:18:04,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:18:04,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:18:04,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:18:04,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:18:04,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:18:04,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:18:04,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:18:04,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:18:04,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:18:04,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:18:04,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:18:04,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:18:04,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:18:04,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:18:04,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:18:04,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:18:04,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:18:04,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:18:04,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:18:04,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:18:04,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:18:04,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:18:04,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:18:04,490 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:18:04,521 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:18:04,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:18:04,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:18:04,523 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:18:04,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:18:04,524 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:18:04,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:18:04,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:18:04,525 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:18:04,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:18:04,526 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:18:04,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:18:04,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:18:04,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:18:04,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:18:04,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:18:04,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:18:04,527 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:18:04,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:18:04,527 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:18:04,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:18:04,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:18:04,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:18:04,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:18:04,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:18:04,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:18:04,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:18:04,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:18:04,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:18:04,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:18:04,529 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:18:04,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:18:04,530 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:18:04,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:18:04,530 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:18:04,531 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:18:04,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:18:04,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:18:04,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:18:04,837 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:18:04,838 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:18:04,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c [2023-09-01 13:18:06,098 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:18:06,318 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:18:06,319 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c [2023-09-01 13:18:06,327 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b0a47e02/d055d831b1f84196b70fe15e4bd8e414/FLAGd000c031a [2023-09-01 13:18:06,350 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b0a47e02/d055d831b1f84196b70fe15e4bd8e414 [2023-09-01 13:18:06,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:18:06,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:18:06,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:18:06,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:18:06,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:18:06,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f8ff0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06, skipping insertion in model container [2023-09-01 13:18:06,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:18:06,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:18:06,593 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-commit-2.wvr.c[5846,5859] [2023-09-01 13:18:06,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:18:06,609 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:18:06,638 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-commit-2.wvr.c[5846,5859] [2023-09-01 13:18:06,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:18:06,654 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:18:06,656 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:18:06,662 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:18:06,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06 WrapperNode [2023-09-01 13:18:06,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:18:06,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:18:06,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:18:06,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:18:06,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,736 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 474 [2023-09-01 13:18:06,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:18:06,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:18:06,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:18:06,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:18:06,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,788 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:18:06,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:18:06,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:18:06,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:18:06,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06" (1/1) ... [2023-09-01 13:18:06,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:18:06,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:18:06,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 13:18:06,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 13:18:06,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:18:06,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:18:06,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:18:06,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:18:06,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:18:06,866 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:18:06,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:18:06,866 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:18:06,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 13:18:06,866 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 13:18:06,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 13:18:06,866 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 13:18:06,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:18:06,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:18:06,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:18:06,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:18:06,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:18:06,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:18:06,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:18:06,869 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:18:07,006 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:18:07,008 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:18:07,680 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:18:07,937 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:18:07,937 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-09-01 13:18:07,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:18:07 BoogieIcfgContainer [2023-09-01 13:18:07,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:18:07,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:18:07,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:18:07,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:18:07,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:18:06" (1/3) ... [2023-09-01 13:18:07,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc47413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:18:07, skipping insertion in model container [2023-09-01 13:18:07,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:18:06" (2/3) ... [2023-09-01 13:18:07,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc47413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:18:07, skipping insertion in model container [2023-09-01 13:18:07,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:18:07" (3/3) ... [2023-09-01 13:18:07,947 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2023-09-01 13:18:07,953 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:18:07,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:18:07,961 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:18:07,961 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:18:08,069 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 13:18:08,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 309 places, 321 transitions, 674 flow [2023-09-01 13:18:08,225 INFO L130 PetriNetUnfolder]: 25/317 cut-off events. [2023-09-01 13:18:08,225 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 13:18:08,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 317 events. 25/317 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 278. Up to 2 conditions per place. [2023-09-01 13:18:08,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 309 places, 321 transitions, 674 flow [2023-09-01 13:18:08,242 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 305 transitions, 634 flow [2023-09-01 13:18:08,245 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:18:08,252 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 305 transitions, 634 flow [2023-09-01 13:18:08,254 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 305 transitions, 634 flow [2023-09-01 13:18:08,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 305 transitions, 634 flow [2023-09-01 13:18:08,317 INFO L130 PetriNetUnfolder]: 25/305 cut-off events. [2023-09-01 13:18:08,318 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 13:18:08,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 305 events. 25/305 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 278. Up to 2 conditions per place. [2023-09-01 13:18:08,324 INFO L119 LiptonReduction]: Number of co-enabled transitions 2928 [2023-09-01 13:18:18,562 INFO L134 LiptonReduction]: Checked pairs total: 6242 [2023-09-01 13:18:18,563 INFO L136 LiptonReduction]: Total number of compositions: 323 [2023-09-01 13:18:18,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:18:18,581 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;@385be235, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:18:18,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-09-01 13:18:18,589 INFO L130 PetriNetUnfolder]: 8/40 cut-off events. [2023-09-01 13:18:18,590 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 13:18:18,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:18,590 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] [2023-09-01 13:18:18,591 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)] === [2023-09-01 13:18:18,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:18,596 INFO L85 PathProgramCache]: Analyzing trace with hash -349444433, now seen corresponding path program 1 times [2023-09-01 13:18:18,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:18,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999606994] [2023-09-01 13:18:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:18,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:18:19,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999606994] [2023-09-01 13:18:19,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999606994] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:18:19,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:18:19,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 13:18:19,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390424617] [2023-09-01 13:18:19,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:18:19,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:18:19,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:19,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:18:19,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:18:19,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 644 [2023-09-01 13:18:19,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:19,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:19,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 644 [2023-09-01 13:18:19,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:19,965 INFO L130 PetriNetUnfolder]: 2346/3110 cut-off events. [2023-09-01 13:18:19,966 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2023-09-01 13:18:19,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6500 conditions, 3110 events. 2346/3110 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11954 event pairs, 381 based on Foata normal form. 1/2317 useless extension candidates. Maximal degree in co-relation 5552. Up to 2810 conditions per place. [2023-09-01 13:18:19,986 INFO L137 encePairwiseOnDemand]: 638/644 looper letters, 58 selfloop transitions, 5 changer transitions 1/64 dead transitions. [2023-09-01 13:18:19,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 301 flow [2023-09-01 13:18:19,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:18:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:18:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2023-09-01 13:18:20,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699792960662526 [2023-09-01 13:18:20,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2023-09-01 13:18:20,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2023-09-01 13:18:20,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:20,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2023-09-01 13:18:20,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:20,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:20,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:20,031 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 106 flow. Second operand 3 states and 908 transitions. [2023-09-01 13:18:20,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 301 flow [2023-09-01 13:18:20,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 13:18:20,050 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 123 flow [2023-09-01 13:18:20,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2023-09-01 13:18:20,058 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-09-01 13:18:20,060 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 123 flow [2023-09-01 13:18:20,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:20,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:20,062 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] [2023-09-01 13:18:20,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:18:20,063 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)] === [2023-09-01 13:18:20,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:20,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1893474723, now seen corresponding path program 1 times [2023-09-01 13:18:20,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:20,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975455602] [2023-09-01 13:18:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:20,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:18:20,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:20,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975455602] [2023-09-01 13:18:20,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975455602] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:18:20,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:18:20,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:18:20,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837383771] [2023-09-01 13:18:20,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:18:20,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:18:20,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:20,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:18:20,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:18:20,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 644 [2023-09-01 13:18:20,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 271.75) internal successors, (1087), 4 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:20,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:20,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 644 [2023-09-01 13:18:20,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:20,918 INFO L130 PetriNetUnfolder]: 2646/3592 cut-off events. [2023-09-01 13:18:20,918 INFO L131 PetriNetUnfolder]: For 811/811 co-relation queries the response was YES. [2023-09-01 13:18:20,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8455 conditions, 3592 events. 2646/3592 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13439 event pairs, 1817 based on Foata normal form. 166/3568 useless extension candidates. Maximal degree in co-relation 3795. Up to 3111 conditions per place. [2023-09-01 13:18:20,949 INFO L137 encePairwiseOnDemand]: 637/644 looper letters, 44 selfloop transitions, 2 changer transitions 30/76 dead transitions. [2023-09-01 13:18:20,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 76 transitions, 355 flow [2023-09-01 13:18:20,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:18:20,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:18:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1134 transitions. [2023-09-01 13:18:20,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44021739130434784 [2023-09-01 13:18:20,953 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1134 transitions. [2023-09-01 13:18:20,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1134 transitions. [2023-09-01 13:18:20,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:20,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1134 transitions. [2023-09-01 13:18:20,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.5) internal successors, (1134), 4 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:20,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:20,963 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:20,963 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 123 flow. Second operand 4 states and 1134 transitions. [2023-09-01 13:18:20,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 76 transitions, 355 flow [2023-09-01 13:18:20,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 76 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:18:20,966 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 140 flow [2023-09-01 13:18:20,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-09-01 13:18:20,968 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-09-01 13:18:20,968 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 140 flow [2023-09-01 13:18:20,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.75) internal successors, (1087), 4 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:20,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:20,970 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, 1] [2023-09-01 13:18:20,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:18:20,970 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)] === [2023-09-01 13:18:20,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:20,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1954963629, now seen corresponding path program 1 times [2023-09-01 13:18:20,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:20,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337648031] [2023-09-01 13:18:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:20,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:18:21,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:21,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337648031] [2023-09-01 13:18:21,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337648031] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:18:21,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:18:21,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:18:21,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359105813] [2023-09-01 13:18:21,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:18:21,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:18:21,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:21,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:18:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:18:21,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-09-01 13:18:21,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:21,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:21,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-09-01 13:18:21,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:21,735 INFO L130 PetriNetUnfolder]: 2852/3829 cut-off events. [2023-09-01 13:18:21,735 INFO L131 PetriNetUnfolder]: For 1529/1529 co-relation queries the response was YES. [2023-09-01 13:18:21,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9573 conditions, 3829 events. 2852/3829 cut-off events. For 1529/1529 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14402 event pairs, 765 based on Foata normal form. 140/3965 useless extension candidates. Maximal degree in co-relation 9559. Up to 2698 conditions per place. [2023-09-01 13:18:21,755 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 68 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-09-01 13:18:21,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 347 flow [2023-09-01 13:18:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:18:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:18:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-09-01 13:18:21,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46790890269151136 [2023-09-01 13:18:21,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-09-01 13:18:21,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-09-01 13:18:21,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:21,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-09-01 13:18:21,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:21,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:21,765 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:21,765 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 140 flow. Second operand 3 states and 904 transitions. [2023-09-01 13:18:21,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 347 flow [2023-09-01 13:18:21,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 343 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 13:18:21,770 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 144 flow [2023-09-01 13:18:21,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-09-01 13:18:21,772 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2023-09-01 13:18:21,774 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 144 flow [2023-09-01 13:18:21,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:21,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:21,775 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, 1] [2023-09-01 13:18:21,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 13:18:21,776 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)] === [2023-09-01 13:18:21,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:21,776 INFO L85 PathProgramCache]: Analyzing trace with hash -418605730, now seen corresponding path program 1 times [2023-09-01 13:18:21,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:21,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909031769] [2023-09-01 13:18:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:21,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:18:21,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:21,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909031769] [2023-09-01 13:18:21,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909031769] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:18:21,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:18:21,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:18:21,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657466489] [2023-09-01 13:18:21,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:18:21,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:18:21,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:21,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:18:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:18:21,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 644 [2023-09-01 13:18:21,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 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) [2023-09-01 13:18:21,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:21,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 644 [2023-09-01 13:18:21,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:22,496 INFO L130 PetriNetUnfolder]: 2676/3627 cut-off events. [2023-09-01 13:18:22,496 INFO L131 PetriNetUnfolder]: For 1635/1635 co-relation queries the response was YES. [2023-09-01 13:18:22,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9333 conditions, 3627 events. 2676/3627 cut-off events. For 1635/1635 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13554 event pairs, 689 based on Foata normal form. 132/3755 useless extension candidates. Maximal degree in co-relation 9313. Up to 2700 conditions per place. [2023-09-01 13:18:22,513 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 68 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-09-01 13:18:22,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 353 flow [2023-09-01 13:18:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:18:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:18:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 899 transitions. [2023-09-01 13:18:22,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46532091097308487 [2023-09-01 13:18:22,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 899 transitions. [2023-09-01 13:18:22,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 899 transitions. [2023-09-01 13:18:22,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:22,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 899 transitions. [2023-09-01 13:18:22,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:22,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:22,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:22,524 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 144 flow. Second operand 3 states and 899 transitions. [2023-09-01 13:18:22,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 353 flow [2023-09-01 13:18:22,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:18:22,529 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 150 flow [2023-09-01 13:18:22,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-09-01 13:18:22,531 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-09-01 13:18:22,531 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 150 flow [2023-09-01 13:18:22,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 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) [2023-09-01 13:18:22,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:22,532 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, 1] [2023-09-01 13:18:22,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:18:22,533 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)] === [2023-09-01 13:18:22,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash -354281914, now seen corresponding path program 1 times [2023-09-01 13:18:22,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:22,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485936105] [2023-09-01 13:18:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:22,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:18:22,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:22,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485936105] [2023-09-01 13:18:22,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485936105] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:18:22,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:18:22,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:18:22,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172447729] [2023-09-01 13:18:22,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:18:22,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:18:22,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:22,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:18:22,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:18:22,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 644 [2023-09-01 13:18:22,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 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) [2023-09-01 13:18:22,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:22,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 644 [2023-09-01 13:18:22,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:23,295 INFO L130 PetriNetUnfolder]: 3151/4250 cut-off events. [2023-09-01 13:18:23,296 INFO L131 PetriNetUnfolder]: For 2502/2502 co-relation queries the response was YES. [2023-09-01 13:18:23,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11311 conditions, 4250 events. 3151/4250 cut-off events. For 2502/2502 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 15712 event pairs, 896 based on Foata normal form. 104/4350 useless extension candidates. Maximal degree in co-relation 11289. Up to 2724 conditions per place. [2023-09-01 13:18:23,317 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 61 selfloop transitions, 2 changer transitions 8/71 dead transitions. [2023-09-01 13:18:23,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 361 flow [2023-09-01 13:18:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:18:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:18:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 902 transitions. [2023-09-01 13:18:23,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668737060041408 [2023-09-01 13:18:23,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 902 transitions. [2023-09-01 13:18:23,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 902 transitions. [2023-09-01 13:18:23,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:23,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 902 transitions. [2023-09-01 13:18:23,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.6666666666667) internal successors, (902), 3 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:23,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:23,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:23,328 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 150 flow. Second operand 3 states and 902 transitions. [2023-09-01 13:18:23,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 361 flow [2023-09-01 13:18:23,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:18:23,333 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 156 flow [2023-09-01 13:18:23,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-09-01 13:18:23,336 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-09-01 13:18:23,336 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 156 flow [2023-09-01 13:18:23,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 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) [2023-09-01 13:18:23,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:23,337 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, 1, 1, 1, 1, 1] [2023-09-01 13:18:23,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 13:18:23,338 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)] === [2023-09-01 13:18:23,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:23,338 INFO L85 PathProgramCache]: Analyzing trace with hash -556616439, now seen corresponding path program 1 times [2023-09-01 13:18:23,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:23,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324335948] [2023-09-01 13:18:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:23,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:18:23,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:23,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324335948] [2023-09-01 13:18:23,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324335948] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:18:23,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:18:23,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:18:23,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993589427] [2023-09-01 13:18:23,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:18:23,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:18:23,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:23,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:18:23,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:18:23,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 644 [2023-09-01 13:18:23,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:23,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:23,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 644 [2023-09-01 13:18:23,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:24,475 INFO L130 PetriNetUnfolder]: 4217/5773 cut-off events. [2023-09-01 13:18:24,476 INFO L131 PetriNetUnfolder]: For 3607/3607 co-relation queries the response was YES. [2023-09-01 13:18:24,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15544 conditions, 5773 events. 4217/5773 cut-off events. For 3607/3607 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 23145 event pairs, 3251 based on Foata normal form. 80/5846 useless extension candidates. Maximal degree in co-relation 15520. Up to 4248 conditions per place. [2023-09-01 13:18:24,503 INFO L137 encePairwiseOnDemand]: 639/644 looper letters, 44 selfloop transitions, 3 changer transitions 34/81 dead transitions. [2023-09-01 13:18:24,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 81 transitions, 418 flow [2023-09-01 13:18:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:18:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:18:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1137 transitions. [2023-09-01 13:18:24,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44138198757763975 [2023-09-01 13:18:24,508 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1137 transitions. [2023-09-01 13:18:24,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1137 transitions. [2023-09-01 13:18:24,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:24,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1137 transitions. [2023-09-01 13:18:24,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:24,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:24,517 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:24,517 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 156 flow. Second operand 4 states and 1137 transitions. [2023-09-01 13:18:24,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 81 transitions, 418 flow [2023-09-01 13:18:24,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:18:24,522 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 172 flow [2023-09-01 13:18:24,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-09-01 13:18:24,523 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-09-01 13:18:24,523 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 172 flow [2023-09-01 13:18:24,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:24,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:24,524 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, 1, 1, 1, 1, 1, 1] [2023-09-01 13:18:24,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 13:18:24,524 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)] === [2023-09-01 13:18:24,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:24,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2129506320, now seen corresponding path program 1 times [2023-09-01 13:18:24,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:24,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510404748] [2023-09-01 13:18:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:24,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:18:24,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:24,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510404748] [2023-09-01 13:18:24,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510404748] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:18:24,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:18:24,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:18:24,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590848321] [2023-09-01 13:18:24,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:18:24,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:18:24,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:18:24,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:18:24,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 644 [2023-09-01 13:18:24,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 273.25) internal successors, (1093), 4 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:24,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:24,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 644 [2023-09-01 13:18:24,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:25,400 INFO L130 PetriNetUnfolder]: 3401/4661 cut-off events. [2023-09-01 13:18:25,400 INFO L131 PetriNetUnfolder]: For 3070/3070 co-relation queries the response was YES. [2023-09-01 13:18:25,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12616 conditions, 4661 events. 3401/4661 cut-off events. For 3070/3070 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 18054 event pairs, 2604 based on Foata normal form. 38/4694 useless extension candidates. Maximal degree in co-relation 12587. Up to 4246 conditions per place. [2023-09-01 13:18:25,421 INFO L137 encePairwiseOnDemand]: 639/644 looper letters, 45 selfloop transitions, 3 changer transitions 24/72 dead transitions. [2023-09-01 13:18:25,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 380 flow [2023-09-01 13:18:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:18:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:18:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1127 transitions. [2023-09-01 13:18:25,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-09-01 13:18:25,425 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1127 transitions. [2023-09-01 13:18:25,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1127 transitions. [2023-09-01 13:18:25,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:25,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1127 transitions. [2023-09-01 13:18:25,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 281.75) internal successors, (1127), 4 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:25,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:25,432 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:25,432 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 172 flow. Second operand 4 states and 1127 transitions. [2023-09-01 13:18:25,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 380 flow [2023-09-01 13:18:25,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 72 transitions, 370 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 13:18:25,437 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 180 flow [2023-09-01 13:18:25,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-09-01 13:18:25,438 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-09-01 13:18:25,438 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 180 flow [2023-09-01 13:18:25,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.25) internal successors, (1093), 4 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:25,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:25,439 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, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:18:25,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 13:18:25,439 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)] === [2023-09-01 13:18:25,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:25,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1842908479, now seen corresponding path program 1 times [2023-09-01 13:18:25,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:25,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438313097] [2023-09-01 13:18:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:25,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:25,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:25,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438313097] [2023-09-01 13:18:25,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438313097] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:18:25,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:18:25,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:18:25,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214013279] [2023-09-01 13:18:25,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:18:25,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:18:25,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:25,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:18:25,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:18:25,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 644 [2023-09-01 13:18:25,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:25,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:25,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 644 [2023-09-01 13:18:25,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:26,286 INFO L130 PetriNetUnfolder]: 3522/4838 cut-off events. [2023-09-01 13:18:26,286 INFO L131 PetriNetUnfolder]: For 3203/3203 co-relation queries the response was YES. [2023-09-01 13:18:26,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13084 conditions, 4838 events. 3522/4838 cut-off events. For 3203/3203 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 18911 event pairs, 2708 based on Foata normal form. 56/4891 useless extension candidates. Maximal degree in co-relation 13055. Up to 4244 conditions per place. [2023-09-01 13:18:26,306 INFO L137 encePairwiseOnDemand]: 634/644 looper letters, 41 selfloop transitions, 8 changer transitions 25/74 dead transitions. [2023-09-01 13:18:26,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 404 flow [2023-09-01 13:18:26,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:18:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:18:26,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1396 transitions. [2023-09-01 13:18:26,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335403726708075 [2023-09-01 13:18:26,311 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1396 transitions. [2023-09-01 13:18:26,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1396 transitions. [2023-09-01 13:18:26,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:26,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1396 transitions. [2023-09-01 13:18:26,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 279.2) internal successors, (1396), 5 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:26,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 644.0) internal successors, (3864), 6 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:26,320 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 644.0) internal successors, (3864), 6 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:26,321 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 180 flow. Second operand 5 states and 1396 transitions. [2023-09-01 13:18:26,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 404 flow [2023-09-01 13:18:26,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 392 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 13:18:26,325 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 202 flow [2023-09-01 13:18:26,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-09-01 13:18:26,327 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2023-09-01 13:18:26,328 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 202 flow [2023-09-01 13:18:26,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:26,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:26,329 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:18:26,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 13:18:26,329 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)] === [2023-09-01 13:18:26,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:26,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1999596867, now seen corresponding path program 1 times [2023-09-01 13:18:26,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:26,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48848217] [2023-09-01 13:18:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:26,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:18:26,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:26,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48848217] [2023-09-01 13:18:26,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48848217] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:18:26,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:18:26,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 13:18:26,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666104524] [2023-09-01 13:18:26,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:18:26,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:18:26,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:26,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:18:26,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:18:26,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-09-01 13:18:26,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:26,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:26,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-09-01 13:18:26,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:26,859 INFO L130 PetriNetUnfolder]: 1883/2543 cut-off events. [2023-09-01 13:18:26,859 INFO L131 PetriNetUnfolder]: For 1868/1868 co-relation queries the response was YES. [2023-09-01 13:18:26,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6966 conditions, 2543 events. 1883/2543 cut-off events. For 1868/1868 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8435 event pairs, 709 based on Foata normal form. 30/2572 useless extension candidates. Maximal degree in co-relation 6933. Up to 2325 conditions per place. [2023-09-01 13:18:26,871 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 51 selfloop transitions, 2 changer transitions 9/62 dead transitions. [2023-09-01 13:18:26,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 358 flow [2023-09-01 13:18:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:18:26,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:18:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 892 transitions. [2023-09-01 13:18:26,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616977225672878 [2023-09-01 13:18:26,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 892 transitions. [2023-09-01 13:18:26,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 892 transitions. [2023-09-01 13:18:26,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:26,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 892 transitions. [2023-09-01 13:18:26,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.3333333333333) internal successors, (892), 3 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:26,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:26,881 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:26,881 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 202 flow. Second operand 3 states and 892 transitions. [2023-09-01 13:18:26,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 358 flow [2023-09-01 13:18:26,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 340 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 13:18:26,885 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 198 flow [2023-09-01 13:18:26,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-09-01 13:18:26,886 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2023-09-01 13:18:26,886 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 198 flow [2023-09-01 13:18:26,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:26,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:26,887 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:18:26,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 13:18:26,887 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)] === [2023-09-01 13:18:26,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:26,888 INFO L85 PathProgramCache]: Analyzing trace with hash -852059088, now seen corresponding path program 1 times [2023-09-01 13:18:26,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:26,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97872397] [2023-09-01 13:18:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:26,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:18:27,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:27,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97872397] [2023-09-01 13:18:27,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97872397] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:18:27,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:18:27,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:18:27,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669413030] [2023-09-01 13:18:27,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:18:27,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:18:27,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:27,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:18:27,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:18:27,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-09-01 13:18:27,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:27,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:27,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-09-01 13:18:27,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:28,041 INFO L130 PetriNetUnfolder]: 5057/6765 cut-off events. [2023-09-01 13:18:28,041 INFO L131 PetriNetUnfolder]: For 5355/5355 co-relation queries the response was YES. [2023-09-01 13:18:28,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19325 conditions, 6765 events. 5057/6765 cut-off events. For 5355/5355 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26305 event pairs, 1639 based on Foata normal form. 198/6962 useless extension candidates. Maximal degree in co-relation 19294. Up to 2697 conditions per place. [2023-09-01 13:18:28,071 INFO L137 encePairwiseOnDemand]: 637/644 looper letters, 89 selfloop transitions, 12 changer transitions 0/101 dead transitions. [2023-09-01 13:18:28,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 578 flow [2023-09-01 13:18:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:18:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:18:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1207 transitions. [2023-09-01 13:18:28,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468555900621118 [2023-09-01 13:18:28,076 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1207 transitions. [2023-09-01 13:18:28,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1207 transitions. [2023-09-01 13:18:28,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:28,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1207 transitions. [2023-09-01 13:18:28,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 301.75) internal successors, (1207), 4 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:28,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:28,084 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:28,084 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 198 flow. Second operand 4 states and 1207 transitions. [2023-09-01 13:18:28,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 578 flow [2023-09-01 13:18:28,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 101 transitions, 574 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 13:18:28,090 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 294 flow [2023-09-01 13:18:28,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-09-01 13:18:28,090 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 17 predicate places. [2023-09-01 13:18:28,090 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 294 flow [2023-09-01 13:18:28,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:28,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:28,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:18:28,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 13:18:28,092 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)] === [2023-09-01 13:18:28,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:28,093 INFO L85 PathProgramCache]: Analyzing trace with hash 335744450, now seen corresponding path program 1 times [2023-09-01 13:18:28,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:28,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399021195] [2023-09-01 13:18:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:28,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:28,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:28,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399021195] [2023-09-01 13:18:28,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399021195] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:18:28,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271550769] [2023-09-01 13:18:28,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:28,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:18:28,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:18:28,397 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) [2023-09-01 13:18:28,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:18:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:28,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:18:28,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:18:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:18:28,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:18:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:18:28,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271550769] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:18:28,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:18:28,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 13:18:28,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008892833] [2023-09-01 13:18:28,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:18:28,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:18:28,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:28,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:18:28,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:18:29,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 644 [2023-09-01 13:18:29,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 294 flow. Second operand has 12 states, 12 states have (on average 260.3333333333333) internal successors, (3124), 12 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:29,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:29,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 644 [2023-09-01 13:18:29,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:30,257 INFO L130 PetriNetUnfolder]: 5288/7161 cut-off events. [2023-09-01 13:18:30,257 INFO L131 PetriNetUnfolder]: For 10275/10275 co-relation queries the response was YES. [2023-09-01 13:18:30,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23568 conditions, 7161 events. 5288/7161 cut-off events. For 10275/10275 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28333 event pairs, 3732 based on Foata normal form. 16/7175 useless extension candidates. Maximal degree in co-relation 22532. Up to 6765 conditions per place. [2023-09-01 13:18:30,286 INFO L137 encePairwiseOnDemand]: 638/644 looper letters, 57 selfloop transitions, 3 changer transitions 45/105 dead transitions. [2023-09-01 13:18:30,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 662 flow [2023-09-01 13:18:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:18:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:18:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1617 transitions. [2023-09-01 13:18:30,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41847826086956524 [2023-09-01 13:18:30,291 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1617 transitions. [2023-09-01 13:18:30,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1617 transitions. [2023-09-01 13:18:30,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:30,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1617 transitions. [2023-09-01 13:18:30,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.5) internal successors, (1617), 6 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:30,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 644.0) internal successors, (4508), 7 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:30,302 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 644.0) internal successors, (4508), 7 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:30,302 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 294 flow. Second operand 6 states and 1617 transitions. [2023-09-01 13:18:30,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 662 flow [2023-09-01 13:18:30,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 636 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-09-01 13:18:30,315 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 294 flow [2023-09-01 13:18:30,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-09-01 13:18:30,316 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2023-09-01 13:18:30,316 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 294 flow [2023-09-01 13:18:30,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 260.3333333333333) internal successors, (3124), 12 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:30,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:30,317 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:18:30,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 13:18:30,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 13:18:30,524 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)] === [2023-09-01 13:18:30,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash -493373472, now seen corresponding path program 2 times [2023-09-01 13:18:30,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:30,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100748881] [2023-09-01 13:18:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:30,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:30,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:30,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100748881] [2023-09-01 13:18:30,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100748881] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:18:30,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308414648] [2023-09-01 13:18:30,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:18:30,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:18:30,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:18:30,829 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) [2023-09-01 13:18:30,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:18:31,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:18:31,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:18:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:18:31,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:18:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:31,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:18:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:31,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308414648] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:18:31,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:18:31,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 13:18:31,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386114686] [2023-09-01 13:18:31,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:18:31,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:18:31,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:31,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:18:31,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:18:31,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 644 [2023-09-01 13:18:31,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 258.8888888888889) internal successors, (4660), 18 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:31,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:31,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 644 [2023-09-01 13:18:31,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:32,864 INFO L130 PetriNetUnfolder]: 5372/7294 cut-off events. [2023-09-01 13:18:32,865 INFO L131 PetriNetUnfolder]: For 8521/8521 co-relation queries the response was YES. [2023-09-01 13:18:32,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23031 conditions, 7294 events. 5372/7294 cut-off events. For 8521/8521 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28948 event pairs, 3740 based on Foata normal form. 28/7320 useless extension candidates. Maximal degree in co-relation 22993. Up to 6765 conditions per place. [2023-09-01 13:18:32,893 INFO L137 encePairwiseOnDemand]: 638/644 looper letters, 57 selfloop transitions, 4 changer transitions 54/115 dead transitions. [2023-09-01 13:18:32,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 115 transitions, 728 flow [2023-09-01 13:18:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:18:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:18:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2137 transitions. [2023-09-01 13:18:32,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41479037267080743 [2023-09-01 13:18:32,900 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2137 transitions. [2023-09-01 13:18:32,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2137 transitions. [2023-09-01 13:18:32,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:32,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2137 transitions. [2023-09-01 13:18:32,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 267.125) internal successors, (2137), 8 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:32,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 644.0) internal successors, (5796), 9 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:32,913 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 644.0) internal successors, (5796), 9 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:32,913 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 294 flow. Second operand 8 states and 2137 transitions. [2023-09-01 13:18:32,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 115 transitions, 728 flow [2023-09-01 13:18:32,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 115 transitions, 708 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-09-01 13:18:32,923 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 314 flow [2023-09-01 13:18:32,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2023-09-01 13:18:32,924 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 30 predicate places. [2023-09-01 13:18:32,924 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 314 flow [2023-09-01 13:18:32,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 258.8888888888889) internal successors, (4660), 18 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:32,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:32,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:18:32,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 13:18:33,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 13:18:33,133 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)] === [2023-09-01 13:18:33,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:33,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2111651186, now seen corresponding path program 3 times [2023-09-01 13:18:33,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:33,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194874946] [2023-09-01 13:18:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:33,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 13:18:33,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:33,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194874946] [2023-09-01 13:18:33,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194874946] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:18:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31577036] [2023-09-01 13:18:33,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:18:33,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:18:33,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:18:33,624 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) [2023-09-01 13:18:33,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:18:33,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:18:33,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:18:33,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:18:33,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:18:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-09-01 13:18:33,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:18:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-09-01 13:18:34,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31577036] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:18:34,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:18:34,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-09-01 13:18:34,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026803635] [2023-09-01 13:18:34,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:18:34,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:18:34,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:34,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:18:34,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:18:34,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 644 [2023-09-01 13:18:34,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 314 flow. Second operand has 12 states, 12 states have (on average 257.5) internal successors, (3090), 12 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:34,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:34,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 644 [2023-09-01 13:18:34,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:37,283 INFO L130 PetriNetUnfolder]: 18348/25227 cut-off events. [2023-09-01 13:18:37,284 INFO L131 PetriNetUnfolder]: For 40134/40134 co-relation queries the response was YES. [2023-09-01 13:18:37,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82252 conditions, 25227 events. 18348/25227 cut-off events. For 40134/40134 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 126503 event pairs, 6024 based on Foata normal form. 1976/27199 useless extension candidates. Maximal degree in co-relation 82207. Up to 6441 conditions per place. [2023-09-01 13:18:37,425 INFO L137 encePairwiseOnDemand]: 634/644 looper letters, 139 selfloop transitions, 14 changer transitions 161/314 dead transitions. [2023-09-01 13:18:37,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 314 transitions, 2022 flow [2023-09-01 13:18:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 13:18:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 13:18:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5525 transitions. [2023-09-01 13:18:37,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4085329784087548 [2023-09-01 13:18:37,439 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5525 transitions. [2023-09-01 13:18:37,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5525 transitions. [2023-09-01 13:18:37,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:37,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5525 transitions. [2023-09-01 13:18:37,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 263.0952380952381) internal successors, (5525), 21 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:37,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 644.0) internal successors, (14168), 22 states have internal predecessors, (14168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:37,474 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 644.0) internal successors, (14168), 22 states have internal predecessors, (14168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:37,474 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 314 flow. Second operand 21 states and 5525 transitions. [2023-09-01 13:18:37,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 314 transitions, 2022 flow [2023-09-01 13:18:37,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 314 transitions, 1930 flow, removed 43 selfloop flow, removed 6 redundant places. [2023-09-01 13:18:37,519 INFO L231 Difference]: Finished difference. Result has 95 places, 67 transitions, 383 flow [2023-09-01 13:18:37,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=383, PETRI_PLACES=95, PETRI_TRANSITIONS=67} [2023-09-01 13:18:37,520 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 49 predicate places. [2023-09-01 13:18:37,520 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 67 transitions, 383 flow [2023-09-01 13:18:37,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 257.5) internal successors, (3090), 12 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:37,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:37,521 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:18:37,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:18:37,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:18:37,728 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)] === [2023-09-01 13:18:37,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:37,728 INFO L85 PathProgramCache]: Analyzing trace with hash -990366533, now seen corresponding path program 1 times [2023-09-01 13:18:37,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:37,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070837045] [2023-09-01 13:18:37,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:37,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 13:18:38,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:38,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070837045] [2023-09-01 13:18:38,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070837045] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:18:38,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:18:38,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:18:38,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505370915] [2023-09-01 13:18:38,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:18:38,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:18:38,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:38,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:18:38,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:18:38,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-09-01 13:18:38,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 67 transitions, 383 flow. Second operand has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:38,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:38,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-09-01 13:18:38,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:43,411 INFO L130 PetriNetUnfolder]: 37552/50260 cut-off events. [2023-09-01 13:18:43,411 INFO L131 PetriNetUnfolder]: For 133074/133074 co-relation queries the response was YES. [2023-09-01 13:18:43,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179980 conditions, 50260 events. 37552/50260 cut-off events. For 133074/133074 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 246066 event pairs, 12155 based on Foata normal form. 1340/51598 useless extension candidates. Maximal degree in co-relation 179921. Up to 17334 conditions per place. [2023-09-01 13:18:43,809 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 134 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2023-09-01 13:18:43,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1045 flow [2023-09-01 13:18:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:18:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:18:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1207 transitions. [2023-09-01 13:18:43,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468555900621118 [2023-09-01 13:18:43,812 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1207 transitions. [2023-09-01 13:18:43,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1207 transitions. [2023-09-01 13:18:43,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:43,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1207 transitions. [2023-09-01 13:18:43,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 301.75) internal successors, (1207), 4 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:43,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:43,819 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:43,819 INFO L175 Difference]: Start difference. First operand has 95 places, 67 transitions, 383 flow. Second operand 4 states and 1207 transitions. [2023-09-01 13:18:43,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1045 flow [2023-09-01 13:18:43,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 139 transitions, 994 flow, removed 19 selfloop flow, removed 9 redundant places. [2023-09-01 13:18:43,988 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 386 flow [2023-09-01 13:18:43,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=386, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2023-09-01 13:18:43,989 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 38 predicate places. [2023-09-01 13:18:43,989 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 386 flow [2023-09-01 13:18:43,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:43,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:43,990 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:18:43,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 13:18:43,991 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)] === [2023-09-01 13:18:43,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:43,991 INFO L85 PathProgramCache]: Analyzing trace with hash -156124942, now seen corresponding path program 1 times [2023-09-01 13:18:43,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:43,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057097189] [2023-09-01 13:18:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:43,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:18:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057097189] [2023-09-01 13:18:52,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057097189] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:18:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786249625] [2023-09-01 13:18:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:52,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:18:52,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:18:52,821 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) [2023-09-01 13:18:52,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:18:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:53,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 133 conjunts are in the unsatisfiable core [2023-09-01 13:18:53,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:18:53,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 13:18:54,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:18:54,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:18:54,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:18:54,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:18:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:56,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:19:07,308 WARN L222 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:19:31,722 WARN L222 SmtUtils]: Spent 24.15s on a formula simplification. DAG size of input: 61 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:20:22,164 WARN L222 SmtUtils]: Spent 50.16s on a formula simplification. DAG size of input: 65 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:20:44,405 WARN L222 SmtUtils]: Spent 22.07s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:21:08,753 WARN L222 SmtUtils]: Spent 24.09s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:22:09,448 WARN L222 SmtUtils]: Spent 1.00m on a formula simplification. DAG size of input: 88 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:23:04,091 WARN L222 SmtUtils]: Spent 54.37s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:25:23,324 WARN L222 SmtUtils]: Spent 2.28m on a formula simplification. DAG size of input: 105 DAG size of output: 102 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:26:07,143 WARN L222 SmtUtils]: Spent 43.32s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:26:25,995 WARN L222 SmtUtils]: Spent 6.39s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:26:26,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:26:26,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 192 [2023-09-01 13:26:26,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:26:26,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 6961241 treesize of output 6694659 [2023-09-01 13:26:33,730 WARN L222 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 3537 DAG size of output: 828 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 13:26:33,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:26:33,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 20027 treesize of output 19619 [2023-09-01 13:26:34,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:26:34,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 19421 treesize of output 14771 [2023-09-01 13:26:34,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:26:34,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 14573 treesize of output 13559 [2023-09-01 13:26:35,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:26:35,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 13361 treesize of output 11135 Killed by 15