./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 f4b24e32 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-?-f4b24e3 [2022-07-13 22:13:50,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:13:50,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:13:50,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:13:50,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:13:50,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:13:50,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:13:50,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:13:50,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:13:50,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:13:50,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:13:50,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:13:50,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:13:50,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:13:50,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:13:50,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:13:50,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:13:50,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:13:50,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:13:50,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:13:50,505 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:13:50,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:13:50,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:13:50,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:13:50,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:13:50,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:13:50,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:13:50,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:13:50,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:13:50,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:13:50,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:13:50,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:13:50,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:13:50,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:13:50,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:13:50,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:13:50,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:13:50,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:13:50,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:13:50,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:13:50,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:13:50,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:13:50,525 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:13:50,539 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:13:50,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:13:50,540 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:13:50,540 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:13:50,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:13:50,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:13:50,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:13:50,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:13:50,541 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:13:50,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:13:50,542 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:13:50,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:13:50,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:13:50,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:13:50,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:13:50,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:13:50,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:13:50,543 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:13:50,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:13:50,543 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:13:50,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:13:50,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:13:50,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:13:50,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:13:50,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:13:50,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:13:50,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:13:50,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:13:50,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:13:50,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:13:50,546 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:13:50,546 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:13:50,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:13:50,547 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 [2022-07-13 22:13:50,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:13:50,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:13:50,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:13:50,785 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:13:50,785 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:13:50,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2022-07-13 22:13:50,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5822b92a/008ea28ba86b4121884f7d6df818eaab/FLAG2c04dd0f7 [2022-07-13 22:13:51,246 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:13:51,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2022-07-13 22:13:51,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5822b92a/008ea28ba86b4121884f7d6df818eaab/FLAG2c04dd0f7 [2022-07-13 22:13:51,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5822b92a/008ea28ba86b4121884f7d6df818eaab [2022-07-13 22:13:51,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:13:51,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:13:51,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:13:51,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:13:51,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:13:51,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:13:51" (1/1) ... [2022-07-13 22:13:51,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74422c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51, skipping insertion in model container [2022-07-13 22:13:51,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:13:51" (1/1) ... [2022-07-13 22:13:51,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:13:51,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:13:51,517 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] [2022-07-13 22:13:51,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:13:51,539 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:13:51,574 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] [2022-07-13 22:13:51,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:13:51,597 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:13:51,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51 WrapperNode [2022-07-13 22:13:51,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:13:51,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:13:51,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:13:51,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:13:51,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51" (1/1) ... [2022-07-13 22:13:51,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51" (1/1) ... [2022-07-13 22:13:51,659 INFO L137 Inliner]: procedures = 27, calls = 80, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 307 [2022-07-13 22:13:51,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:13:51,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:13:51,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:13:51,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:13:51,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51" (1/1) ... [2022-07-13 22:13:51,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51" (1/1) ... [2022-07-13 22:13:51,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51" (1/1) ... [2022-07-13 22:13:51,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51" (1/1) ... [2022-07-13 22:13:51,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51" (1/1) ... [2022-07-13 22:13:51,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51" (1/1) ... [2022-07-13 22:13:51,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51" (1/1) ... [2022-07-13 22:13:51,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:13:51,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:13:51,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:13:51,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:13:51,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51" (1/1) ... [2022-07-13 22:13:51,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:13:51,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:13:51,736 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) [2022-07-13 22:13:51,768 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 [2022-07-13 22:13:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:13:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:13:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:13:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:13:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:13:51,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:13:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:13:51,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:13:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-13 22:13:51,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-13 22:13:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-13 22:13:51,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-13 22:13:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:13:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:13:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:13:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:13:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:13:51,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:13:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:13:51,781 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:13:51,880 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:13:51,881 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:13:52,228 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:13:52,316 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:13:52,317 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-13 22:13:52,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:13:52 BoogieIcfgContainer [2022-07-13 22:13:52,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:13:52,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:13:52,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:13:52,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:13:52,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:13:51" (1/3) ... [2022-07-13 22:13:52,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d50c0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:13:52, skipping insertion in model container [2022-07-13 22:13:52,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:13:51" (2/3) ... [2022-07-13 22:13:52,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d50c0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:13:52, skipping insertion in model container [2022-07-13 22:13:52,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:13:52" (3/3) ... [2022-07-13 22:13:52,329 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2022-07-13 22:13:52,333 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:13:52,339 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:13:52,340 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:13:52,340 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:13:52,400 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 22:13:52,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 226 places, 231 transitions, 494 flow [2022-07-13 22:13:52,511 INFO L129 PetriNetUnfolder]: 18/227 cut-off events. [2022-07-13 22:13:52,511 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:13:52,515 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. [2022-07-13 22:13:52,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 231 transitions, 494 flow [2022-07-13 22:13:52,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 214 transitions, 452 flow [2022-07-13 22:13:52,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:13:52,541 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@173ca660, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@41109420 [2022-07-13 22:13:52,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 22:13:52,591 INFO L129 PetriNetUnfolder]: 18/213 cut-off events. [2022-07-13 22:13:52,592 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:13:52,592 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:13:52,593 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] [2022-07-13 22:13:52,594 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)] === [2022-07-13 22:13:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:13:52,597 INFO L85 PathProgramCache]: Analyzing trace with hash -406160465, now seen corresponding path program 1 times [2022-07-13 22:13:52,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:13:52,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200002284] [2022-07-13 22:13:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:13:52,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:13:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:13:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:13:52,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:13:52,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200002284] [2022-07-13 22:13:52,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200002284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:13:52,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:13:52,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:13:52,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020342809] [2022-07-13 22:13:52,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:13:52,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:13:52,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:13:52,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:13:52,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:13:52,830 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 231 [2022-07-13 22:13:52,836 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) [2022-07-13 22:13:52,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:13:52,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 231 [2022-07-13 22:13:52,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:13:52,953 INFO L129 PetriNetUnfolder]: 226/753 cut-off events. [2022-07-13 22:13:52,953 INFO L130 PetriNetUnfolder]: For 145/146 co-relation queries the response was YES. [2022-07-13 22:13:52,956 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. [2022-07-13 22:13:52,960 INFO L132 encePairwiseOnDemand]: 219/231 looper letters, 14 selfloop transitions, 0 changer transitions 6/202 dead transitions. [2022-07-13 22:13:52,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 202 transitions, 456 flow [2022-07-13 22:13:52,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:13:52,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:13:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 434 transitions. [2022-07-13 22:13:52,970 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9393939393939394 [2022-07-13 22:13:52,970 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 434 transitions. [2022-07-13 22:13:52,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 434 transitions. [2022-07-13 22:13:52,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:13:52,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 434 transitions. [2022-07-13 22:13:52,976 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) [2022-07-13 22:13:52,980 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) [2022-07-13 22:13:52,981 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) [2022-07-13 22:13:52,982 INFO L186 Difference]: Start difference. First operand has 209 places, 214 transitions, 452 flow. Second operand 2 states and 434 transitions. [2022-07-13 22:13:52,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 202 transitions, 456 flow [2022-07-13 22:13:52,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 202 transitions, 440 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-13 22:13:52,988 INFO L242 Difference]: Finished difference. Result has 202 places, 196 transitions, 400 flow [2022-07-13 22:13:52,989 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} [2022-07-13 22:13:52,992 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, -7 predicate places. [2022-07-13 22:13:52,992 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 196 transitions, 400 flow [2022-07-13 22:13:52,992 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) [2022-07-13 22:13:52,992 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:13:52,993 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] [2022-07-13 22:13:52,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:13:52,993 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)] === [2022-07-13 22:13:52,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:13:52,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1838195375, now seen corresponding path program 1 times [2022-07-13 22:13:52,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:13:52,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112805431] [2022-07-13 22:13:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:13:52,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:13:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:13:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:13:53,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:13:53,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112805431] [2022-07-13 22:13:53,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112805431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:13:53,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:13:53,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:13:53,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739834033] [2022-07-13 22:13:53,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:13:53,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:13:53,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:13:53,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:13:53,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:13:53,296 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 231 [2022-07-13 22:13:53,297 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) [2022-07-13 22:13:53,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:13:53,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 231 [2022-07-13 22:13:53,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:13:53,503 INFO L129 PetriNetUnfolder]: 251/831 cut-off events. [2022-07-13 22:13:53,504 INFO L130 PetriNetUnfolder]: For 39/40 co-relation queries the response was YES. [2022-07-13 22:13:53,506 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. [2022-07-13 22:13:53,510 INFO L132 encePairwiseOnDemand]: 225/231 looper letters, 46 selfloop transitions, 3 changer transitions 4/210 dead transitions. [2022-07-13 22:13:53,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 210 transitions, 539 flow [2022-07-13 22:13:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:13:53,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:13:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 919 transitions. [2022-07-13 22:13:53,515 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956709956709956 [2022-07-13 22:13:53,515 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 919 transitions. [2022-07-13 22:13:53,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 919 transitions. [2022-07-13 22:13:53,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:13:53,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 919 transitions. [2022-07-13 22:13:53,518 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) [2022-07-13 22:13:53,521 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) [2022-07-13 22:13:53,522 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) [2022-07-13 22:13:53,522 INFO L186 Difference]: Start difference. First operand has 202 places, 196 transitions, 400 flow. Second operand 5 states and 919 transitions. [2022-07-13 22:13:53,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 210 transitions, 539 flow [2022-07-13 22:13:53,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 210 transitions, 539 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:13:53,530 INFO L242 Difference]: Finished difference. Result has 203 places, 198 transitions, 423 flow [2022-07-13 22:13:53,531 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} [2022-07-13 22:13:53,532 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, -6 predicate places. [2022-07-13 22:13:53,532 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 198 transitions, 423 flow [2022-07-13 22:13:53,533 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) [2022-07-13 22:13:53,533 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:13:53,533 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] [2022-07-13 22:13:53,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:13:53,534 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)] === [2022-07-13 22:13:53,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:13:53,534 INFO L85 PathProgramCache]: Analyzing trace with hash 354637970, now seen corresponding path program 1 times [2022-07-13 22:13:53,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:13:53,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116063735] [2022-07-13 22:13:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:13:53,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:13:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:13:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:13:53,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:13:53,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116063735] [2022-07-13 22:13:53,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116063735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:13:53,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:13:53,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:13:53,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938663370] [2022-07-13 22:13:53,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:13:53,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:13:53,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:13:53,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:13:53,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:13:53,652 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 231 [2022-07-13 22:13:53,652 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) [2022-07-13 22:13:53,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:13:53,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 231 [2022-07-13 22:13:53,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:13:53,786 INFO L129 PetriNetUnfolder]: 395/1111 cut-off events. [2022-07-13 22:13:53,787 INFO L130 PetriNetUnfolder]: For 214/216 co-relation queries the response was YES. [2022-07-13 22:13:53,790 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. [2022-07-13 22:13:53,794 INFO L132 encePairwiseOnDemand]: 228/231 looper letters, 33 selfloop transitions, 2 changer transitions 0/211 dead transitions. [2022-07-13 22:13:53,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 211 transitions, 531 flow [2022-07-13 22:13:53,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:13:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:13:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2022-07-13 22:13:53,796 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2022-07-13 22:13:53,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2022-07-13 22:13:53,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2022-07-13 22:13:53,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:13:53,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2022-07-13 22:13:53,798 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) [2022-07-13 22:13:53,799 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) [2022-07-13 22:13:53,800 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) [2022-07-13 22:13:53,800 INFO L186 Difference]: Start difference. First operand has 203 places, 198 transitions, 423 flow. Second operand 3 states and 627 transitions. [2022-07-13 22:13:53,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 211 transitions, 531 flow [2022-07-13 22:13:53,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 211 transitions, 523 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 22:13:53,804 INFO L242 Difference]: Finished difference. Result has 201 places, 199 transitions, 430 flow [2022-07-13 22:13:53,804 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} [2022-07-13 22:13:53,805 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, -8 predicate places. [2022-07-13 22:13:53,805 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 199 transitions, 430 flow [2022-07-13 22:13:53,805 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) [2022-07-13 22:13:53,805 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:13:53,806 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] [2022-07-13 22:13:53,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:13:53,806 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)] === [2022-07-13 22:13:53,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:13:53,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1397341416, now seen corresponding path program 1 times [2022-07-13 22:13:53,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:13:53,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944072150] [2022-07-13 22:13:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:13:53,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:13:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:13:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:13:53,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:13:53,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944072150] [2022-07-13 22:13:53,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944072150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:13:53,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:13:53,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:13:53,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680109219] [2022-07-13 22:13:53,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:13:53,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:13:53,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:13:53,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:13:53,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:13:53,890 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 231 [2022-07-13 22:13:53,891 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) [2022-07-13 22:13:53,891 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:13:53,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 231 [2022-07-13 22:13:53,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:13:54,010 INFO L129 PetriNetUnfolder]: 299/1051 cut-off events. [2022-07-13 22:13:54,010 INFO L130 PetriNetUnfolder]: For 359/360 co-relation queries the response was YES. [2022-07-13 22:13:54,013 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. [2022-07-13 22:13:54,016 INFO L132 encePairwiseOnDemand]: 228/231 looper letters, 34 selfloop transitions, 2 changer transitions 0/212 dead transitions. [2022-07-13 22:13:54,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 212 transitions, 547 flow [2022-07-13 22:13:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:13:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:13:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2022-07-13 22:13:54,018 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9033189033189033 [2022-07-13 22:13:54,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2022-07-13 22:13:54,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2022-07-13 22:13:54,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:13:54,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2022-07-13 22:13:54,019 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) [2022-07-13 22:13:54,021 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) [2022-07-13 22:13:54,021 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) [2022-07-13 22:13:54,021 INFO L186 Difference]: Start difference. First operand has 201 places, 199 transitions, 430 flow. Second operand 3 states and 626 transitions. [2022-07-13 22:13:54,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 212 transitions, 547 flow [2022-07-13 22:13:54,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 212 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:13:54,024 INFO L242 Difference]: Finished difference. Result has 203 places, 200 transitions, 442 flow [2022-07-13 22:13:54,024 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} [2022-07-13 22:13:54,025 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, -6 predicate places. [2022-07-13 22:13:54,025 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 200 transitions, 442 flow [2022-07-13 22:13:54,025 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) [2022-07-13 22:13:54,026 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:13:54,026 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] [2022-07-13 22:13:54,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:13:54,026 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)] === [2022-07-13 22:13:54,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:13:54,026 INFO L85 PathProgramCache]: Analyzing trace with hash 267181317, now seen corresponding path program 1 times [2022-07-13 22:13:54,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:13:54,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840195801] [2022-07-13 22:13:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:13:54,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:13:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:13:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:13:54,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:13:54,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840195801] [2022-07-13 22:13:54,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840195801] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:13:54,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:13:54,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:13:54,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452989948] [2022-07-13 22:13:54,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:13:54,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:13:54,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:13:54,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:13:54,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:13:54,091 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 231 [2022-07-13 22:13:54,092 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) [2022-07-13 22:13:54,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:13:54,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 231 [2022-07-13 22:13:54,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:13:54,280 INFO L129 PetriNetUnfolder]: 212/971 cut-off events. [2022-07-13 22:13:54,280 INFO L130 PetriNetUnfolder]: For 388/389 co-relation queries the response was YES. [2022-07-13 22:13:54,283 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. [2022-07-13 22:13:54,286 INFO L132 encePairwiseOnDemand]: 221/231 looper letters, 63 selfloop transitions, 11 changer transitions 0/230 dead transitions. [2022-07-13 22:13:54,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 230 transitions, 671 flow [2022-07-13 22:13:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:13:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:13:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1671 transitions. [2022-07-13 22:13:54,289 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8037518037518038 [2022-07-13 22:13:54,289 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1671 transitions. [2022-07-13 22:13:54,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1671 transitions. [2022-07-13 22:13:54,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:13:54,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1671 transitions. [2022-07-13 22:13:54,292 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) [2022-07-13 22:13:54,294 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) [2022-07-13 22:13:54,295 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) [2022-07-13 22:13:54,295 INFO L186 Difference]: Start difference. First operand has 203 places, 200 transitions, 442 flow. Second operand 9 states and 1671 transitions. [2022-07-13 22:13:54,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 230 transitions, 671 flow [2022-07-13 22:13:54,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 230 transitions, 668 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:13:54,299 INFO L242 Difference]: Finished difference. Result has 212 places, 204 transitions, 482 flow [2022-07-13 22:13:54,299 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} [2022-07-13 22:13:54,299 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 3 predicate places. [2022-07-13 22:13:54,300 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 204 transitions, 482 flow [2022-07-13 22:13:54,300 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) [2022-07-13 22:13:54,300 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:13:54,300 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] [2022-07-13 22:13:54,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:13:54,300 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)] === [2022-07-13 22:13:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:13:54,301 INFO L85 PathProgramCache]: Analyzing trace with hash -537616131, now seen corresponding path program 1 times [2022-07-13 22:13:54,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:13:54,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479735338] [2022-07-13 22:13:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:13:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:13:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:13:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:13:54,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:13:54,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479735338] [2022-07-13 22:13:54,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479735338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:13:54,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:13:54,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:13:54,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693656064] [2022-07-13 22:13:54,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:13:54,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:13:54,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:13:54,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:13:54,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:13:54,359 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 231 [2022-07-13 22:13:54,360 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) [2022-07-13 22:13:54,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:13:54,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 231 [2022-07-13 22:13:54,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:13:54,544 INFO L129 PetriNetUnfolder]: 236/1235 cut-off events. [2022-07-13 22:13:54,544 INFO L130 PetriNetUnfolder]: For 512/514 co-relation queries the response was YES. [2022-07-13 22:13:54,547 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. [2022-07-13 22:13:54,551 INFO L132 encePairwiseOnDemand]: 223/231 looper letters, 58 selfloop transitions, 8 changer transitions 0/222 dead transitions. [2022-07-13 22:13:54,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 222 transitions, 672 flow [2022-07-13 22:13:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:13:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:13:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1303 transitions. [2022-07-13 22:13:54,553 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8058132343846629 [2022-07-13 22:13:54,553 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1303 transitions. [2022-07-13 22:13:54,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1303 transitions. [2022-07-13 22:13:54,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:13:54,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1303 transitions. [2022-07-13 22:13:54,556 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) [2022-07-13 22:13:54,557 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) [2022-07-13 22:13:54,558 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) [2022-07-13 22:13:54,558 INFO L186 Difference]: Start difference. First operand has 212 places, 204 transitions, 482 flow. Second operand 7 states and 1303 transitions. [2022-07-13 22:13:54,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 222 transitions, 672 flow [2022-07-13 22:13:54,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 222 transitions, 663 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 22:13:54,562 INFO L242 Difference]: Finished difference. Result has 217 places, 206 transitions, 503 flow [2022-07-13 22:13:54,562 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} [2022-07-13 22:13:54,562 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 8 predicate places. [2022-07-13 22:13:54,562 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 206 transitions, 503 flow [2022-07-13 22:13:54,563 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) [2022-07-13 22:13:54,563 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:13:54,563 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] [2022-07-13 22:13:54,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 22:13:54,563 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)] === [2022-07-13 22:13:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:13:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1061166329, now seen corresponding path program 1 times [2022-07-13 22:13:54,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:13:54,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912722146] [2022-07-13 22:13:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:13:54,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:13:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:13:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:13:54,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:13:54,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912722146] [2022-07-13 22:13:54,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912722146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:13:54,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:13:54,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:13:54,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966760661] [2022-07-13 22:13:54,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:13:54,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:13:54,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:13:54,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:13:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:13:54,682 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 231 [2022-07-13 22:13:54,687 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) [2022-07-13 22:13:54,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:13:54,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 231 [2022-07-13 22:13:54,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:13:56,040 INFO L129 PetriNetUnfolder]: 6122/11752 cut-off events. [2022-07-13 22:13:56,041 INFO L130 PetriNetUnfolder]: For 3994/3994 co-relation queries the response was YES. [2022-07-13 22:13:56,068 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. [2022-07-13 22:13:56,110 INFO L132 encePairwiseOnDemand]: 221/231 looper letters, 103 selfloop transitions, 15 changer transitions 12/301 dead transitions. [2022-07-13 22:13:56,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 301 transitions, 1060 flow [2022-07-13 22:13:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:13:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:13:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1619 transitions. [2022-07-13 22:13:56,119 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8760822510822511 [2022-07-13 22:13:56,119 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1619 transitions. [2022-07-13 22:13:56,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1619 transitions. [2022-07-13 22:13:56,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:13:56,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1619 transitions. [2022-07-13 22:13:56,126 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) [2022-07-13 22:13:56,129 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) [2022-07-13 22:13:56,129 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) [2022-07-13 22:13:56,129 INFO L186 Difference]: Start difference. First operand has 217 places, 206 transitions, 503 flow. Second operand 8 states and 1619 transitions. [2022-07-13 22:13:56,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 301 transitions, 1060 flow [2022-07-13 22:13:56,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 301 transitions, 1048 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:13:56,138 INFO L242 Difference]: Finished difference. Result has 225 places, 219 transitions, 584 flow [2022-07-13 22:13:56,138 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} [2022-07-13 22:13:56,139 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 16 predicate places. [2022-07-13 22:13:56,139 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 219 transitions, 584 flow [2022-07-13 22:13:56,140 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) [2022-07-13 22:13:56,140 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:13:56,140 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] [2022-07-13 22:13:56,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:13:56,141 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)] === [2022-07-13 22:13:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:13:56,141 INFO L85 PathProgramCache]: Analyzing trace with hash -111381155, now seen corresponding path program 2 times [2022-07-13 22:13:56,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:13:56,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075338787] [2022-07-13 22:13:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:13:56,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:13:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:13:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:13:56,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:13:56,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075338787] [2022-07-13 22:13:56,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075338787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:13:56,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550471826] [2022-07-13 22:13:56,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:13:56,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:13:56,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:13:56,260 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) [2022-07-13 22:13:56,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:13:56,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:13:56,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:13:56,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:13:56,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:13:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:13:56,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:13:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:13:57,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550471826] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:13:57,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:13:57,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 14 [2022-07-13 22:13:57,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171480563] [2022-07-13 22:13:57,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:13:57,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:13:57,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:13:57,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:13:57,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:13:57,114 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 231 [2022-07-13 22:13:57,115 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) [2022-07-13 22:13:57,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:13:57,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 231 [2022-07-13 22:13:57,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:13:58,982 INFO L129 PetriNetUnfolder]: 8461/16048 cut-off events. [2022-07-13 22:13:58,982 INFO L130 PetriNetUnfolder]: For 9508/9510 co-relation queries the response was YES. [2022-07-13 22:13:59,021 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. [2022-07-13 22:13:59,071 INFO L132 encePairwiseOnDemand]: 221/231 looper letters, 147 selfloop transitions, 40 changer transitions 7/365 dead transitions. [2022-07-13 22:13:59,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 365 transitions, 1520 flow [2022-07-13 22:13:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 22:13:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 22:13:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2402 transitions. [2022-07-13 22:13:59,076 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8665223665223665 [2022-07-13 22:13:59,076 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2402 transitions. [2022-07-13 22:13:59,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2402 transitions. [2022-07-13 22:13:59,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:13:59,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2402 transitions. [2022-07-13 22:13:59,080 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) [2022-07-13 22:13:59,083 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) [2022-07-13 22:13:59,084 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) [2022-07-13 22:13:59,084 INFO L186 Difference]: Start difference. First operand has 225 places, 219 transitions, 584 flow. Second operand 12 states and 2402 transitions. [2022-07-13 22:13:59,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 365 transitions, 1520 flow [2022-07-13 22:13:59,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 365 transitions, 1520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:13:59,094 INFO L242 Difference]: Finished difference. Result has 246 places, 255 transitions, 918 flow [2022-07-13 22:13:59,095 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} [2022-07-13 22:13:59,095 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 37 predicate places. [2022-07-13 22:13:59,095 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 255 transitions, 918 flow [2022-07-13 22:13:59,096 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) [2022-07-13 22:13:59,096 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:13:59,096 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] [2022-07-13 22:13:59,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:13:59,311 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 [2022-07-13 22:13:59,312 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)] === [2022-07-13 22:13:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:13:59,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1237215803, now seen corresponding path program 3 times [2022-07-13 22:13:59,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:13:59,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201148069] [2022-07-13 22:13:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:13:59,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:13:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:13:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:13:59,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:13:59,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201148069] [2022-07-13 22:13:59,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201148069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:13:59,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874247847] [2022-07-13 22:13:59,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:13:59,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:13:59,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:13:59,472 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) [2022-07-13 22:13:59,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:13:59,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:13:59,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:13:59,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 22:13:59,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:14:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:14:00,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:14:00,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874247847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:14:00,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:14:00,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2022-07-13 22:14:00,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006665650] [2022-07-13 22:14:00,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:14:00,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:14:00,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:14:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:14:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:14:00,136 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 231 [2022-07-13 22:14:00,138 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) [2022-07-13 22:14:00,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:14:00,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 231 [2022-07-13 22:14:00,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:14:07,151 INFO L129 PetriNetUnfolder]: 34529/60900 cut-off events. [2022-07-13 22:14:07,151 INFO L130 PetriNetUnfolder]: For 89132/89566 co-relation queries the response was YES. [2022-07-13 22:14:07,594 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. [2022-07-13 22:14:07,811 INFO L132 encePairwiseOnDemand]: 214/231 looper letters, 363 selfloop transitions, 127 changer transitions 22/681 dead transitions. [2022-07-13 22:14:07,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 681 transitions, 4111 flow [2022-07-13 22:14:07,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 22:14:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-13 22:14:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4527 transitions. [2022-07-13 22:14:07,820 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8520609824957651 [2022-07-13 22:14:07,820 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4527 transitions. [2022-07-13 22:14:07,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4527 transitions. [2022-07-13 22:14:07,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:14:07,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4527 transitions. [2022-07-13 22:14:07,830 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) [2022-07-13 22:14:07,837 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) [2022-07-13 22:14:07,847 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) [2022-07-13 22:14:07,848 INFO L186 Difference]: Start difference. First operand has 246 places, 255 transitions, 918 flow. Second operand 23 states and 4527 transitions. [2022-07-13 22:14:07,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 681 transitions, 4111 flow [2022-07-13 22:14:08,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 681 transitions, 4090 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-13 22:14:08,400 INFO L242 Difference]: Finished difference. Result has 286 places, 360 transitions, 2165 flow [2022-07-13 22:14:08,401 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} [2022-07-13 22:14:08,401 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 77 predicate places. [2022-07-13 22:14:08,402 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 360 transitions, 2165 flow [2022-07-13 22:14:08,403 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) [2022-07-13 22:14:08,403 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:14:08,403 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] [2022-07-13 22:14:08,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 22:14:08,619 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 [2022-07-13 22:14:08,620 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)] === [2022-07-13 22:14:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:14:08,621 INFO L85 PathProgramCache]: Analyzing trace with hash 678802063, now seen corresponding path program 4 times [2022-07-13 22:14:08,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:14:08,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137235163] [2022-07-13 22:14:08,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:14:08,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:14:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:14:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:14:08,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:14:08,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137235163] [2022-07-13 22:14:08,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137235163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:14:08,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:14:08,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 22:14:08,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958812857] [2022-07-13 22:14:08,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:14:08,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:14:08,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:14:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:14:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:14:08,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 231 [2022-07-13 22:14:08,818 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) [2022-07-13 22:14:08,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:14:08,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 231 [2022-07-13 22:14:08,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:14:16,795 INFO L129 PetriNetUnfolder]: 30781/55271 cut-off events. [2022-07-13 22:14:16,795 INFO L130 PetriNetUnfolder]: For 277821/281196 co-relation queries the response was YES. [2022-07-13 22:14:17,457 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. [2022-07-13 22:14:17,669 INFO L132 encePairwiseOnDemand]: 219/231 looper letters, 237 selfloop transitions, 234 changer transitions 6/652 dead transitions. [2022-07-13 22:14:17,669 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 652 transitions, 5880 flow [2022-07-13 22:14:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 22:14:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 22:14:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1986 transitions. [2022-07-13 22:14:17,672 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8597402597402597 [2022-07-13 22:14:17,672 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1986 transitions. [2022-07-13 22:14:17,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1986 transitions. [2022-07-13 22:14:17,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:14:17,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1986 transitions. [2022-07-13 22:14:17,676 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) [2022-07-13 22:14:17,678 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) [2022-07-13 22:14:17,679 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) [2022-07-13 22:14:17,679 INFO L186 Difference]: Start difference. First operand has 286 places, 360 transitions, 2165 flow. Second operand 10 states and 1986 transitions. [2022-07-13 22:14:17,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 652 transitions, 5880 flow [2022-07-13 22:14:19,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 652 transitions, 5870 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-13 22:14:19,711 INFO L242 Difference]: Finished difference. Result has 297 places, 512 transitions, 4675 flow [2022-07-13 22:14:19,712 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} [2022-07-13 22:14:19,712 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 88 predicate places. [2022-07-13 22:14:19,712 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 512 transitions, 4675 flow [2022-07-13 22:14:19,713 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) [2022-07-13 22:14:19,713 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:14:19,713 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] [2022-07-13 22:14:19,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 22:14:19,713 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)] === [2022-07-13 22:14:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:14:19,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1838192387, now seen corresponding path program 5 times [2022-07-13 22:14:19,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:14:19,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59450471] [2022-07-13 22:14:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:14:19,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:14:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:14:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:14:19,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:14:19,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59450471] [2022-07-13 22:14:19,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59450471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:14:19,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:14:19,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-13 22:14:19,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440165613] [2022-07-13 22:14:19,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:14:19,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:14:19,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:14:19,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:14:19,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 22:14:19,923 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 231 [2022-07-13 22:14:19,924 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) [2022-07-13 22:14:19,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:14:19,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 231 [2022-07-13 22:14:19,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:14:28,416 INFO L129 PetriNetUnfolder]: 27944/53026 cut-off events. [2022-07-13 22:14:28,417 INFO L130 PetriNetUnfolder]: For 346430/347409 co-relation queries the response was YES. [2022-07-13 22:14:29,117 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. [2022-07-13 22:14:29,336 INFO L132 encePairwiseOnDemand]: 221/231 looper letters, 199 selfloop transitions, 217 changer transitions 13/608 dead transitions. [2022-07-13 22:14:29,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 608 transitions, 6456 flow [2022-07-13 22:14:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:14:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:14:29,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1585 transitions. [2022-07-13 22:14:29,339 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8576839826839827 [2022-07-13 22:14:29,339 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1585 transitions. [2022-07-13 22:14:29,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1585 transitions. [2022-07-13 22:14:29,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:14:29,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1585 transitions. [2022-07-13 22:14:29,341 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) [2022-07-13 22:14:29,343 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) [2022-07-13 22:14:29,343 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) [2022-07-13 22:14:29,343 INFO L186 Difference]: Start difference. First operand has 297 places, 512 transitions, 4675 flow. Second operand 8 states and 1585 transitions. [2022-07-13 22:14:29,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 608 transitions, 6456 flow [2022-07-13 22:14:32,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 608 transitions, 6245 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-07-13 22:14:32,043 INFO L242 Difference]: Finished difference. Result has 305 places, 521 transitions, 5172 flow [2022-07-13 22:14:32,044 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} [2022-07-13 22:14:32,044 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 96 predicate places. [2022-07-13 22:14:32,044 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 521 transitions, 5172 flow [2022-07-13 22:14:32,045 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) [2022-07-13 22:14:32,045 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:14:32,045 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] [2022-07-13 22:14:32,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 22:14:32,046 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)] === [2022-07-13 22:14:32,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:14:32,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1118088719, now seen corresponding path program 6 times [2022-07-13 22:14:32,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:14:32,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064872990] [2022-07-13 22:14:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:14:32,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:14:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:14:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:14:32,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:14:32,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064872990] [2022-07-13 22:14:32,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064872990] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:14:32,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675002013] [2022-07-13 22:14:32,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:14:32,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:14:32,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:14:32,174 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) [2022-07-13 22:14:32,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:14:32,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-13 22:14:32,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:14:32,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 22:14:32,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:14:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:14:32,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:14:32,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675002013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:14:32,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:14:32,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2022-07-13 22:14:32,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3284078] [2022-07-13 22:14:32,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:14:32,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:14:32,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:14:32,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:14:32,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-13 22:14:32,946 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 231 [2022-07-13 22:14:32,947 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) [2022-07-13 22:14:32,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:14:32,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 231 [2022-07-13 22:14:32,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand