./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-mult.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 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:49:41,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:49:41,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:49:41,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:49:41,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:49:41,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:49:41,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:49:41,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:49:41,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:49:41,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:49:41,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:49:41,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:49:41,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:49:41,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:49:41,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:49:41,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:49:41,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:49:41,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:49:41,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:49:41,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:49:41,553 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:49:41,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:49:41,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:49:41,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:49:41,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:49:41,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:49:41,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:49:41,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:49:41,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:49:41,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:49:41,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:49:41,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:49:41,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:49:41,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:49:41,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:49:41,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:49:41,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:49:41,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:49:41,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:49:41,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:49:41,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:49:41,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:49:41,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:49:41,579 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:49:41,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:49:41,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:49:41,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:49:41,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:49:41,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:49:41,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:49:41,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:49:41,582 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:49:41,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:49:41,582 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:49:41,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:49:41,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:49:41,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:49:41,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:49:41,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:49:41,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:49:41,583 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:49:41,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:49:41,583 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:49:41,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:49:41,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:49:41,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:49:41,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:49:41,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:49:41,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:49:41,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:49:41,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:49:41,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:49:41,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:49:41,585 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:49:41,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:49:41,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:49:41,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 [2022-07-22 21:49:41,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:49:41,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:49:41,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:49:41,783 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:49:41,784 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:49:41,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2022-07-22 21:49:41,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a5fa81f/7fc970c4e7794d008079d5616f6a316e/FLAG282120959 [2022-07-22 21:49:42,258 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:49:42,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2022-07-22 21:49:42,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a5fa81f/7fc970c4e7794d008079d5616f6a316e/FLAG282120959 [2022-07-22 21:49:42,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a5fa81f/7fc970c4e7794d008079d5616f6a316e [2022-07-22 21:49:42,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:49:42,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:49:42,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:49:42,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:49:42,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:49:42,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:49:42" (1/1) ... [2022-07-22 21:49:42,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@124dd284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42, skipping insertion in model container [2022-07-22 21:49:42,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:49:42" (1/1) ... [2022-07-22 21:49:42,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:49:42,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:49:42,471 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4218,4231] [2022-07-22 21:49:42,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:49:42,482 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:49:42,499 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4218,4231] [2022-07-22 21:49:42,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:49:42,527 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:49:42,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42 WrapperNode [2022-07-22 21:49:42,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:49:42,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:49:42,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:49:42,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:49:42,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42" (1/1) ... [2022-07-22 21:49:42,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42" (1/1) ... [2022-07-22 21:49:42,563 INFO L137 Inliner]: procedures = 27, calls = 80, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 307 [2022-07-22 21:49:42,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:49:42,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:49:42,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:49:42,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:49:42,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42" (1/1) ... [2022-07-22 21:49:42,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42" (1/1) ... [2022-07-22 21:49:42,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42" (1/1) ... [2022-07-22 21:49:42,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42" (1/1) ... [2022-07-22 21:49:42,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42" (1/1) ... [2022-07-22 21:49:42,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42" (1/1) ... [2022-07-22 21:49:42,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42" (1/1) ... [2022-07-22 21:49:42,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:49:42,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:49:42,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:49:42,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:49:42,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42" (1/1) ... [2022-07-22 21:49:42,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:49:42,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:42,626 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) [2022-07-22 21:49:42,633 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 [2022-07-22 21:49:42,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:49:42,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:49:42,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:49:42,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:49:42,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:49:42,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:49:42,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:49:42,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:49:42,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:49:42,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:49:42,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-22 21:49:42,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-22 21:49:42,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:49:42,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:49:42,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:49:42,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:49:42,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:49:42,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:49:42,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:49:42,672 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:49:42,739 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:49:42,743 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:49:43,037 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:49:43,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:49:43,196 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 21:49:43,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:49:43 BoogieIcfgContainer [2022-07-22 21:49:43,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:49:43,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:49:43,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:49:43,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:49:43,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:49:42" (1/3) ... [2022-07-22 21:49:43,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a8ca05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:49:43, skipping insertion in model container [2022-07-22 21:49:43,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:42" (2/3) ... [2022-07-22 21:49:43,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a8ca05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:49:43, skipping insertion in model container [2022-07-22 21:49:43,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:49:43" (3/3) ... [2022-07-22 21:49:43,208 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2022-07-22 21:49:43,213 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:49:43,220 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:49:43,220 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:49:43,220 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:49:43,317 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-22 21:49:43,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 226 places, 231 transitions, 494 flow [2022-07-22 21:49:43,415 INFO L129 PetriNetUnfolder]: 18/227 cut-off events. [2022-07-22 21:49:43,415 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:49:43,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 227 events. 18/227 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 188. Up to 2 conditions per place. [2022-07-22 21:49:43,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 231 transitions, 494 flow [2022-07-22 21:49:43,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 214 transitions, 452 flow [2022-07-22 21:49:43,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:49:43,434 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@35b1867, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5b44a32c [2022-07-22 21:49:43,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:49:43,460 INFO L129 PetriNetUnfolder]: 18/213 cut-off events. [2022-07-22 21:49:43,460 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:49:43,460 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:43,461 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:43,461 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)] === [2022-07-22 21:49:43,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:43,465 INFO L85 PathProgramCache]: Analyzing trace with hash -406160465, now seen corresponding path program 1 times [2022-07-22 21:49:43,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:43,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210155735] [2022-07-22 21:49:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:43,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:43,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:43,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210155735] [2022-07-22 21:49:43,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210155735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:49:43,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:49:43,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:49:43,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245954159] [2022-07-22 21:49:43,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:43,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:49:43,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:43,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:49:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:49:43,652 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 231 [2022-07-22 21:49:43,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 214 transitions, 452 flow. Second operand has 2 states, 2 states have (on average 210.0) internal successors, (420), 2 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:43,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:43,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 231 [2022-07-22 21:49:43,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:43,791 INFO L129 PetriNetUnfolder]: 226/753 cut-off events. [2022-07-22 21:49:43,792 INFO L130 PetriNetUnfolder]: For 145/146 co-relation queries the response was YES. [2022-07-22 21:49:43,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1164 conditions, 753 events. 226/753 cut-off events. For 145/146 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3384 event pairs, 121 based on Foata normal form. 197/865 useless extension candidates. Maximal degree in co-relation 906. Up to 306 conditions per place. [2022-07-22 21:49:43,801 INFO L132 encePairwiseOnDemand]: 219/231 looper letters, 14 selfloop transitions, 0 changer transitions 6/202 dead transitions. [2022-07-22 21:49:43,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 202 transitions, 456 flow [2022-07-22 21:49:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:49:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:49:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 434 transitions. [2022-07-22 21:49:43,819 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9393939393939394 [2022-07-22 21:49:43,819 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 434 transitions. [2022-07-22 21:49:43,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 434 transitions. [2022-07-22 21:49:43,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:43,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 434 transitions. [2022-07-22 21:49:43,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 217.0) internal successors, (434), 2 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:43,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:43,833 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:43,834 INFO L186 Difference]: Start difference. First operand has 209 places, 214 transitions, 452 flow. Second operand 2 states and 434 transitions. [2022-07-22 21:49:43,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 202 transitions, 456 flow [2022-07-22 21:49:43,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 202 transitions, 440 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-22 21:49:43,842 INFO L242 Difference]: Finished difference. Result has 202 places, 196 transitions, 400 flow [2022-07-22 21:49:43,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=400, PETRI_PLACES=202, PETRI_TRANSITIONS=196} [2022-07-22 21:49:43,848 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, -7 predicate places. [2022-07-22 21:49:43,848 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 196 transitions, 400 flow [2022-07-22 21:49:43,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 210.0) internal successors, (420), 2 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:43,849 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:43,849 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:43,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:49:43,850 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)] === [2022-07-22 21:49:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:43,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1838195375, now seen corresponding path program 1 times [2022-07-22 21:49:43,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:43,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264575251] [2022-07-22 21:49:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:43,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:44,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264575251] [2022-07-22 21:49:44,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264575251] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:49:44,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:49:44,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:49:44,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087992665] [2022-07-22 21:49:44,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:44,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:49:44,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:44,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:49:44,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:49:44,191 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 231 [2022-07-22 21:49:44,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 196 transitions, 400 flow. Second operand has 5 states, 5 states have (on average 179.6) internal successors, (898), 5 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:44,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 231 [2022-07-22 21:49:44,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:44,368 INFO L129 PetriNetUnfolder]: 251/831 cut-off events. [2022-07-22 21:49:44,368 INFO L130 PetriNetUnfolder]: For 39/40 co-relation queries the response was YES. [2022-07-22 21:49:44,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1227 conditions, 831 events. 251/831 cut-off events. For 39/40 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3936 event pairs, 32 based on Foata normal form. 1/748 useless extension candidates. Maximal degree in co-relation 1224. Up to 249 conditions per place. [2022-07-22 21:49:44,400 INFO L132 encePairwiseOnDemand]: 225/231 looper letters, 46 selfloop transitions, 3 changer transitions 4/210 dead transitions. [2022-07-22 21:49:44,400 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 210 transitions, 539 flow [2022-07-22 21:49:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:49:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:49:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 919 transitions. [2022-07-22 21:49:44,402 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956709956709956 [2022-07-22 21:49:44,403 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 919 transitions. [2022-07-22 21:49:44,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 919 transitions. [2022-07-22 21:49:44,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:44,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 919 transitions. [2022-07-22 21:49:44,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,408 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,408 INFO L186 Difference]: Start difference. First operand has 202 places, 196 transitions, 400 flow. Second operand 5 states and 919 transitions. [2022-07-22 21:49:44,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 210 transitions, 539 flow [2022-07-22 21:49:44,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 210 transitions, 539 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:49:44,416 INFO L242 Difference]: Finished difference. Result has 203 places, 198 transitions, 423 flow [2022-07-22 21:49:44,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=423, PETRI_PLACES=203, PETRI_TRANSITIONS=198} [2022-07-22 21:49:44,417 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, -6 predicate places. [2022-07-22 21:49:44,418 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 198 transitions, 423 flow [2022-07-22 21:49:44,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 179.6) internal successors, (898), 5 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,418 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:44,419 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:44,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:49:44,419 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)] === [2022-07-22 21:49:44,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:44,420 INFO L85 PathProgramCache]: Analyzing trace with hash 354637970, now seen corresponding path program 1 times [2022-07-22 21:49:44,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:44,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005443206] [2022-07-22 21:49:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:44,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:44,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:44,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005443206] [2022-07-22 21:49:44,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005443206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:49:44,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:49:44,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:49:44,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033837398] [2022-07-22 21:49:44,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:44,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:49:44,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:49:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:49:44,558 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 231 [2022-07-22 21:49:44,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 198 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:44,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 231 [2022-07-22 21:49:44,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:44,744 INFO L129 PetriNetUnfolder]: 395/1111 cut-off events. [2022-07-22 21:49:44,744 INFO L130 PetriNetUnfolder]: For 214/216 co-relation queries the response was YES. [2022-07-22 21:49:44,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 1111 events. 395/1111 cut-off events. For 214/216 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5739 event pairs, 70 based on Foata normal form. 18/1018 useless extension candidates. Maximal degree in co-relation 1903. Up to 431 conditions per place. [2022-07-22 21:49:44,750 INFO L132 encePairwiseOnDemand]: 228/231 looper letters, 33 selfloop transitions, 2 changer transitions 0/211 dead transitions. [2022-07-22 21:49:44,750 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 211 transitions, 531 flow [2022-07-22 21:49:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:49:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:49:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2022-07-22 21:49:44,752 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2022-07-22 21:49:44,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2022-07-22 21:49:44,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2022-07-22 21:49:44,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:44,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2022-07-22 21:49:44,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,755 INFO L186 Difference]: Start difference. First operand has 203 places, 198 transitions, 423 flow. Second operand 3 states and 627 transitions. [2022-07-22 21:49:44,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 211 transitions, 531 flow [2022-07-22 21:49:44,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 211 transitions, 523 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-22 21:49:44,759 INFO L242 Difference]: Finished difference. Result has 201 places, 199 transitions, 430 flow [2022-07-22 21:49:44,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=201, PETRI_TRANSITIONS=199} [2022-07-22 21:49:44,760 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, -8 predicate places. [2022-07-22 21:49:44,760 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 199 transitions, 430 flow [2022-07-22 21:49:44,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,760 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:44,760 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:44,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:49:44,761 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)] === [2022-07-22 21:49:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:44,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1397341416, now seen corresponding path program 1 times [2022-07-22 21:49:44,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:44,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394474416] [2022-07-22 21:49:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:44,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:44,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394474416] [2022-07-22 21:49:44,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394474416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:49:44,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:49:44,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:49:44,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483021784] [2022-07-22 21:49:44,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:44,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:49:44,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:44,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:49:44,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:49:44,811 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 231 [2022-07-22 21:49:44,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 199 transitions, 430 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:44,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 231 [2022-07-22 21:49:44,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:44,958 INFO L129 PetriNetUnfolder]: 299/1051 cut-off events. [2022-07-22 21:49:44,959 INFO L130 PetriNetUnfolder]: For 359/360 co-relation queries the response was YES. [2022-07-22 21:49:44,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 1051 events. 299/1051 cut-off events. For 359/360 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5597 event pairs, 106 based on Foata normal form. 14/916 useless extension candidates. Maximal degree in co-relation 1776. Up to 353 conditions per place. [2022-07-22 21:49:44,966 INFO L132 encePairwiseOnDemand]: 228/231 looper letters, 34 selfloop transitions, 2 changer transitions 0/212 dead transitions. [2022-07-22 21:49:44,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 212 transitions, 547 flow [2022-07-22 21:49:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:49:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:49:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2022-07-22 21:49:44,968 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9033189033189033 [2022-07-22 21:49:44,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2022-07-22 21:49:44,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2022-07-22 21:49:44,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:44,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2022-07-22 21:49:44,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,971 INFO L186 Difference]: Start difference. First operand has 201 places, 199 transitions, 430 flow. Second operand 3 states and 626 transitions. [2022-07-22 21:49:44,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 212 transitions, 547 flow [2022-07-22 21:49:44,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 212 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:49:44,975 INFO L242 Difference]: Finished difference. Result has 203 places, 200 transitions, 442 flow [2022-07-22 21:49:44,975 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=442, PETRI_PLACES=203, PETRI_TRANSITIONS=200} [2022-07-22 21:49:44,976 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, -6 predicate places. [2022-07-22 21:49:44,976 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 200 transitions, 442 flow [2022-07-22 21:49:44,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:44,976 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:44,977 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:44,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:49:44,980 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)] === [2022-07-22 21:49:44,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:44,981 INFO L85 PathProgramCache]: Analyzing trace with hash 267181317, now seen corresponding path program 1 times [2022-07-22 21:49:44,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:44,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792677852] [2022-07-22 21:49:44,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:44,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:45,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:45,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792677852] [2022-07-22 21:49:45,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792677852] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:49:45,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:49:45,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:49:45,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779938113] [2022-07-22 21:49:45,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:45,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:49:45,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:45,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:49:45,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:49:45,076 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 231 [2022-07-22 21:49:45,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 200 transitions, 442 flow. Second operand has 6 states, 6 states have (on average 182.83333333333334) internal successors, (1097), 6 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:45,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:45,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 231 [2022-07-22 21:49:45,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:45,268 INFO L129 PetriNetUnfolder]: 212/971 cut-off events. [2022-07-22 21:49:45,269 INFO L130 PetriNetUnfolder]: For 388/389 co-relation queries the response was YES. [2022-07-22 21:49:45,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1698 conditions, 971 events. 212/971 cut-off events. For 388/389 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4702 event pairs, 98 based on Foata normal form. 12/882 useless extension candidates. Maximal degree in co-relation 1691. Up to 289 conditions per place. [2022-07-22 21:49:45,275 INFO L132 encePairwiseOnDemand]: 221/231 looper letters, 63 selfloop transitions, 11 changer transitions 0/230 dead transitions. [2022-07-22 21:49:45,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 230 transitions, 671 flow [2022-07-22 21:49:45,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:49:45,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:49:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1671 transitions. [2022-07-22 21:49:45,278 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8037518037518038 [2022-07-22 21:49:45,278 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1671 transitions. [2022-07-22 21:49:45,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1671 transitions. [2022-07-22 21:49:45,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:45,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1671 transitions. [2022-07-22 21:49:45,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 185.66666666666666) internal successors, (1671), 9 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:45,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:45,286 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:45,286 INFO L186 Difference]: Start difference. First operand has 203 places, 200 transitions, 442 flow. Second operand 9 states and 1671 transitions. [2022-07-22 21:49:45,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 230 transitions, 671 flow [2022-07-22 21:49:45,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 230 transitions, 668 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:49:45,290 INFO L242 Difference]: Finished difference. Result has 212 places, 204 transitions, 482 flow [2022-07-22 21:49:45,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=482, PETRI_PLACES=212, PETRI_TRANSITIONS=204} [2022-07-22 21:49:45,292 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 3 predicate places. [2022-07-22 21:49:45,293 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 204 transitions, 482 flow [2022-07-22 21:49:45,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 182.83333333333334) internal successors, (1097), 6 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:45,293 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:45,293 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:45,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:49:45,294 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)] === [2022-07-22 21:49:45,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:45,295 INFO L85 PathProgramCache]: Analyzing trace with hash -537616131, now seen corresponding path program 1 times [2022-07-22 21:49:45,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:45,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107262864] [2022-07-22 21:49:45,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:45,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:45,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:45,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107262864] [2022-07-22 21:49:45,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107262864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:49:45,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:49:45,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:49:45,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014641308] [2022-07-22 21:49:45,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:45,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:49:45,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:45,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:49:45,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:49:45,386 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 231 [2022-07-22 21:49:45,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 204 transitions, 482 flow. Second operand has 6 states, 6 states have (on average 182.83333333333334) internal successors, (1097), 6 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:45,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:45,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 231 [2022-07-22 21:49:45,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:45,578 INFO L129 PetriNetUnfolder]: 236/1235 cut-off events. [2022-07-22 21:49:45,578 INFO L130 PetriNetUnfolder]: For 512/514 co-relation queries the response was YES. [2022-07-22 21:49:45,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 1235 events. 236/1235 cut-off events. For 512/514 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6855 event pairs, 110 based on Foata normal form. 20/1127 useless extension candidates. Maximal degree in co-relation 2088. Up to 346 conditions per place. [2022-07-22 21:49:45,586 INFO L132 encePairwiseOnDemand]: 223/231 looper letters, 58 selfloop transitions, 8 changer transitions 0/222 dead transitions. [2022-07-22 21:49:45,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 222 transitions, 672 flow [2022-07-22 21:49:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:49:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:49:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1303 transitions. [2022-07-22 21:49:45,589 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8058132343846629 [2022-07-22 21:49:45,589 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1303 transitions. [2022-07-22 21:49:45,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1303 transitions. [2022-07-22 21:49:45,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:45,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1303 transitions. [2022-07-22 21:49:45,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 186.14285714285714) internal successors, (1303), 7 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:45,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:45,593 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:45,593 INFO L186 Difference]: Start difference. First operand has 212 places, 204 transitions, 482 flow. Second operand 7 states and 1303 transitions. [2022-07-22 21:49:45,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 222 transitions, 672 flow [2022-07-22 21:49:45,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 222 transitions, 663 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:49:45,600 INFO L242 Difference]: Finished difference. Result has 217 places, 206 transitions, 503 flow [2022-07-22 21:49:45,600 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=503, PETRI_PLACES=217, PETRI_TRANSITIONS=206} [2022-07-22 21:49:45,602 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 8 predicate places. [2022-07-22 21:49:45,602 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 206 transitions, 503 flow [2022-07-22 21:49:45,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 182.83333333333334) internal successors, (1097), 6 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:45,603 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:45,603 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:45,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:49:45,603 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)] === [2022-07-22 21:49:45,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:45,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1061166329, now seen corresponding path program 1 times [2022-07-22 21:49:45,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:45,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352214972] [2022-07-22 21:49:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:49:45,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:45,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352214972] [2022-07-22 21:49:45,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352214972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:49:45,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:49:45,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:49:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723332750] [2022-07-22 21:49:45,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:45,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:49:45,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:49:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:49:45,804 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 231 [2022-07-22 21:49:45,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 206 transitions, 503 flow. Second operand has 7 states, 7 states have (on average 190.57142857142858) internal successors, (1334), 7 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:45,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:45,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 231 [2022-07-22 21:49:45,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:47,140 INFO L129 PetriNetUnfolder]: 6122/11752 cut-off events. [2022-07-22 21:49:47,140 INFO L130 PetriNetUnfolder]: For 3994/3994 co-relation queries the response was YES. [2022-07-22 21:49:47,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24025 conditions, 11752 events. 6122/11752 cut-off events. For 3994/3994 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 91631 event pairs, 1601 based on Foata normal form. 0/10286 useless extension candidates. Maximal degree in co-relation 24014. Up to 3989 conditions per place. [2022-07-22 21:49:47,287 INFO L132 encePairwiseOnDemand]: 221/231 looper letters, 103 selfloop transitions, 15 changer transitions 12/301 dead transitions. [2022-07-22 21:49:47,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 301 transitions, 1060 flow [2022-07-22 21:49:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:49:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:49:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1619 transitions. [2022-07-22 21:49:47,291 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8760822510822511 [2022-07-22 21:49:47,291 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1619 transitions. [2022-07-22 21:49:47,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1619 transitions. [2022-07-22 21:49:47,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:47,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1619 transitions. [2022-07-22 21:49:47,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.375) internal successors, (1619), 8 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:47,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 231.0) internal successors, (2079), 9 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:47,297 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 231.0) internal successors, (2079), 9 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:47,297 INFO L186 Difference]: Start difference. First operand has 217 places, 206 transitions, 503 flow. Second operand 8 states and 1619 transitions. [2022-07-22 21:49:47,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 301 transitions, 1060 flow [2022-07-22 21:49:47,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 301 transitions, 1048 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:49:47,302 INFO L242 Difference]: Finished difference. Result has 225 places, 219 transitions, 584 flow [2022-07-22 21:49:47,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=584, PETRI_PLACES=225, PETRI_TRANSITIONS=219} [2022-07-22 21:49:47,303 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 16 predicate places. [2022-07-22 21:49:47,303 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 219 transitions, 584 flow [2022-07-22 21:49:47,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.57142857142858) internal successors, (1334), 7 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:47,304 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:47,304 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:47,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:49:47,304 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)] === [2022-07-22 21:49:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:47,305 INFO L85 PathProgramCache]: Analyzing trace with hash -111381155, now seen corresponding path program 2 times [2022-07-22 21:49:47,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:47,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758007481] [2022-07-22 21:49:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:47,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:47,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:47,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758007481] [2022-07-22 21:49:47,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758007481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:47,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321350031] [2022-07-22 21:49:47,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:49:47,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:47,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:47,408 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) [2022-07-22 21:49:47,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:49:47,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:49:47,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:49:47,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:49:47,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:49:47,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:49:48,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321350031] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:48,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:49:48,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 14 [2022-07-22 21:49:48,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550182870] [2022-07-22 21:49:48,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:48,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:49:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:48,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:49:48,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:49:48,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 231 [2022-07-22 21:49:48,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 219 transitions, 584 flow. Second operand has 7 states, 7 states have (on average 190.57142857142858) internal successors, (1334), 7 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:48,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:48,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 231 [2022-07-22 21:49:48,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:50,238 INFO L129 PetriNetUnfolder]: 8461/16048 cut-off events. [2022-07-22 21:49:50,238 INFO L130 PetriNetUnfolder]: For 9508/9510 co-relation queries the response was YES. [2022-07-22 21:49:50,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37362 conditions, 16048 events. 8461/16048 cut-off events. For 9508/9510 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 131262 event pairs, 750 based on Foata normal form. 356/15917 useless extension candidates. Maximal degree in co-relation 37346. Up to 3177 conditions per place. [2022-07-22 21:49:50,353 INFO L132 encePairwiseOnDemand]: 221/231 looper letters, 147 selfloop transitions, 40 changer transitions 7/365 dead transitions. [2022-07-22 21:49:50,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 365 transitions, 1520 flow [2022-07-22 21:49:50,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:49:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-22 21:49:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2402 transitions. [2022-07-22 21:49:50,357 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8665223665223665 [2022-07-22 21:49:50,357 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2402 transitions. [2022-07-22 21:49:50,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2402 transitions. [2022-07-22 21:49:50,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:50,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2402 transitions. [2022-07-22 21:49:50,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 200.16666666666666) internal successors, (2402), 12 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:50,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 231.0) internal successors, (3003), 13 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:50,366 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 231.0) internal successors, (3003), 13 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:50,366 INFO L186 Difference]: Start difference. First operand has 225 places, 219 transitions, 584 flow. Second operand 12 states and 2402 transitions. [2022-07-22 21:49:50,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 365 transitions, 1520 flow [2022-07-22 21:49:50,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 365 transitions, 1520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:49:50,377 INFO L242 Difference]: Finished difference. Result has 246 places, 255 transitions, 918 flow [2022-07-22 21:49:50,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=918, PETRI_PLACES=246, PETRI_TRANSITIONS=255} [2022-07-22 21:49:50,378 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 37 predicate places. [2022-07-22 21:49:50,378 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 255 transitions, 918 flow [2022-07-22 21:49:50,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.57142857142858) internal successors, (1334), 7 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:50,379 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:50,379 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:50,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:49:50,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:50,603 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)] === [2022-07-22 21:49:50,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:50,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1237215803, now seen corresponding path program 3 times [2022-07-22 21:49:50,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:50,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35603214] [2022-07-22 21:49:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:50,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:50,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:50,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35603214] [2022-07-22 21:49:50,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35603214] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:50,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131918764] [2022-07-22 21:49:50,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:49:50,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:50,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:50,779 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) [2022-07-22 21:49:50,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:49:50,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:49:50,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:49:50,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:49:50,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:49:51,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:49:51,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131918764] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:49:51,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:49:51,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2022-07-22 21:49:51,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649240511] [2022-07-22 21:49:51,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:51,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:49:51,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:51,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:49:51,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:49:51,395 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 231 [2022-07-22 21:49:51,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 255 transitions, 918 flow. Second operand has 9 states, 9 states have (on average 184.33333333333334) internal successors, (1659), 9 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:51,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:51,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 231 [2022-07-22 21:49:51,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:58,662 INFO L129 PetriNetUnfolder]: 34529/60900 cut-off events. [2022-07-22 21:49:58,663 INFO L130 PetriNetUnfolder]: For 89132/89566 co-relation queries the response was YES. [2022-07-22 21:49:59,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171503 conditions, 60900 events. 34529/60900 cut-off events. For 89132/89566 co-relation queries the response was YES. Maximal size of possible extension queue 2477. Compared 579515 event pairs, 6113 based on Foata normal form. 972/55390 useless extension candidates. Maximal degree in co-relation 171476. Up to 15351 conditions per place. [2022-07-22 21:49:59,258 INFO L132 encePairwiseOnDemand]: 214/231 looper letters, 363 selfloop transitions, 127 changer transitions 22/681 dead transitions. [2022-07-22 21:49:59,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 681 transitions, 4111 flow [2022-07-22 21:49:59,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 21:49:59,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-22 21:49:59,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4527 transitions. [2022-07-22 21:49:59,268 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8520609824957651 [2022-07-22 21:49:59,268 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4527 transitions. [2022-07-22 21:49:59,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4527 transitions. [2022-07-22 21:49:59,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:59,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4527 transitions. [2022-07-22 21:49:59,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 196.82608695652175) internal successors, (4527), 23 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:59,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 231.0) internal successors, (5544), 24 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:59,285 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 231.0) internal successors, (5544), 24 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:59,285 INFO L186 Difference]: Start difference. First operand has 246 places, 255 transitions, 918 flow. Second operand 23 states and 4527 transitions. [2022-07-22 21:49:59,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 681 transitions, 4111 flow [2022-07-22 21:49:59,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 681 transitions, 4090 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-22 21:49:59,899 INFO L242 Difference]: Finished difference. Result has 286 places, 360 transitions, 2165 flow [2022-07-22 21:49:59,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2165, PETRI_PLACES=286, PETRI_TRANSITIONS=360} [2022-07-22 21:49:59,909 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 77 predicate places. [2022-07-22 21:49:59,909 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 360 transitions, 2165 flow [2022-07-22 21:49:59,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 184.33333333333334) internal successors, (1659), 9 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:59,915 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:59,916 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:59,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 21:50:00,116 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,SelfDestructingSolverStorable8 [2022-07-22 21:50:00,117 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)] === [2022-07-22 21:50:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:50:00,117 INFO L85 PathProgramCache]: Analyzing trace with hash 678802063, now seen corresponding path program 4 times [2022-07-22 21:50:00,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:50:00,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229270334] [2022-07-22 21:50:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:50:00,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:50:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:50:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:50:00,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:50:00,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229270334] [2022-07-22 21:50:00,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229270334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:50:00,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:50:00,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:50:00,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564879803] [2022-07-22 21:50:00,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:50:00,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:50:00,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:50:00,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:50:00,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:50:00,297 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 231 [2022-07-22 21:50:00,298 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 360 transitions, 2165 flow. Second operand has 8 states, 8 states have (on average 186.625) internal successors, (1493), 8 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:00,298 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:50:00,298 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 231 [2022-07-22 21:50:00,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:50:08,608 INFO L129 PetriNetUnfolder]: 30781/55271 cut-off events. [2022-07-22 21:50:08,608 INFO L130 PetriNetUnfolder]: For 277821/281196 co-relation queries the response was YES. [2022-07-22 21:50:09,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 233117 conditions, 55271 events. 30781/55271 cut-off events. For 277821/281196 co-relation queries the response was YES. Maximal size of possible extension queue 2362. Compared 535143 event pairs, 5607 based on Foata normal form. 344/53353 useless extension candidates. Maximal degree in co-relation 233071. Up to 24049 conditions per place. [2022-07-22 21:50:09,582 INFO L132 encePairwiseOnDemand]: 219/231 looper letters, 237 selfloop transitions, 234 changer transitions 6/652 dead transitions. [2022-07-22 21:50:09,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 652 transitions, 5880 flow [2022-07-22 21:50:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:50:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:50:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1986 transitions. [2022-07-22 21:50:09,587 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8597402597402597 [2022-07-22 21:50:09,587 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1986 transitions. [2022-07-22 21:50:09,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1986 transitions. [2022-07-22 21:50:09,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:50:09,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1986 transitions. [2022-07-22 21:50:09,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.6) internal successors, (1986), 10 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:09,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 231.0) internal successors, (2541), 11 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:09,595 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 231.0) internal successors, (2541), 11 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:09,595 INFO L186 Difference]: Start difference. First operand has 286 places, 360 transitions, 2165 flow. Second operand 10 states and 1986 transitions. [2022-07-22 21:50:09,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 652 transitions, 5880 flow [2022-07-22 21:50:11,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 652 transitions, 5870 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-22 21:50:11,771 INFO L242 Difference]: Finished difference. Result has 297 places, 512 transitions, 4675 flow [2022-07-22 21:50:11,772 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4675, PETRI_PLACES=297, PETRI_TRANSITIONS=512} [2022-07-22 21:50:11,773 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 88 predicate places. [2022-07-22 21:50:11,773 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 512 transitions, 4675 flow [2022-07-22 21:50:11,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.625) internal successors, (1493), 8 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:11,773 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:50:11,774 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:50:11,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:50:11,774 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)] === [2022-07-22 21:50:11,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:50:11,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1838192387, now seen corresponding path program 5 times [2022-07-22 21:50:11,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:50:11,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468281893] [2022-07-22 21:50:11,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:50:11,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:50:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:50:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:50:11,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:50:11,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468281893] [2022-07-22 21:50:11,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468281893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:50:11,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:50:11,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 21:50:11,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566270911] [2022-07-22 21:50:11,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:50:11,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:50:11,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:50:11,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:50:11,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:50:11,996 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 231 [2022-07-22 21:50:11,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 512 transitions, 4675 flow. Second operand has 10 states, 10 states have (on average 185.9) internal successors, (1859), 10 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:11,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:50:11,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 231 [2022-07-22 21:50:11,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:50:20,759 INFO L129 PetriNetUnfolder]: 27944/53026 cut-off events. [2022-07-22 21:50:20,760 INFO L130 PetriNetUnfolder]: For 346430/347409 co-relation queries the response was YES. [2022-07-22 21:50:21,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243134 conditions, 53026 events. 27944/53026 cut-off events. For 346430/347409 co-relation queries the response was YES. Maximal size of possible extension queue 2203. Compared 538264 event pairs, 3687 based on Foata normal form. 352/51914 useless extension candidates. Maximal degree in co-relation 243083. Up to 21984 conditions per place. [2022-07-22 21:50:21,671 INFO L132 encePairwiseOnDemand]: 221/231 looper letters, 199 selfloop transitions, 217 changer transitions 13/608 dead transitions. [2022-07-22 21:50:21,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 608 transitions, 6456 flow [2022-07-22 21:50:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:50:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:50:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1585 transitions. [2022-07-22 21:50:21,673 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8576839826839827 [2022-07-22 21:50:21,674 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1585 transitions. [2022-07-22 21:50:21,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1585 transitions. [2022-07-22 21:50:21,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:50:21,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1585 transitions. [2022-07-22 21:50:21,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.125) internal successors, (1585), 8 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:21,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 231.0) internal successors, (2079), 9 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:21,679 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 231.0) internal successors, (2079), 9 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:21,679 INFO L186 Difference]: Start difference. First operand has 297 places, 512 transitions, 4675 flow. Second operand 8 states and 1585 transitions. [2022-07-22 21:50:21,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 608 transitions, 6456 flow [2022-07-22 21:50:24,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 608 transitions, 6245 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-07-22 21:50:24,123 INFO L242 Difference]: Finished difference. Result has 305 places, 521 transitions, 5172 flow [2022-07-22 21:50:24,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=4476, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5172, PETRI_PLACES=305, PETRI_TRANSITIONS=521} [2022-07-22 21:50:24,124 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 96 predicate places. [2022-07-22 21:50:24,124 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 521 transitions, 5172 flow [2022-07-22 21:50:24,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 185.9) internal successors, (1859), 10 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:24,125 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:50:24,125 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:50:24,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:50:24,126 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)] === [2022-07-22 21:50:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:50:24,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1118088719, now seen corresponding path program 6 times [2022-07-22 21:50:24,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:50:24,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911226804] [2022-07-22 21:50:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:50:24,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:50:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:50:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:50:24,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:50:24,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911226804] [2022-07-22 21:50:24,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911226804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:50:24,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477404288] [2022-07-22 21:50:24,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:50:24,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:50:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:50:24,238 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) [2022-07-22 21:50:24,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:50:24,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-22 21:50:24,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:50:24,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:50:24,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:50:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:50:25,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:50:25,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477404288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:50:25,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:50:25,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2022-07-22 21:50:25,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416142227] [2022-07-22 21:50:25,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:50:25,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:50:25,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:50:25,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:50:25,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:50:25,026 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 231 [2022-07-22 21:50:25,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 521 transitions, 5172 flow. Second operand has 10 states, 10 states have (on average 184.1) internal successors, (1841), 10 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:25,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:50:25,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 231 [2022-07-22 21:50:25,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand