./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/fibonacci.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 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 19:22:20,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:22:20,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:22:20,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:22:20,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:22:20,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:22:20,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:22:20,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:22:20,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:22:20,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:22:20,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:22:20,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:22:20,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:22:20,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:22:20,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:22:20,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:22:20,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:22:20,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:22:20,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:22:20,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:22:20,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:22:20,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:22:20,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:22:20,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:22:20,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:22:20,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:22:20,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:22:20,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:22:20,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:22:20,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:22:20,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:22:20,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:22:20,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:22:20,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:22:20,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:22:20,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:22:20,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:22:20,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:22:20,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:22:20,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:22:20,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:22:20,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:22:20,711 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:22:20,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:22:20,712 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:22:20,712 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:22:20,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:22:20,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:22:20,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:22:20,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:22:20,714 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:22:20,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:22:20,714 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:22:20,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:22:20,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:22:20,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:22:20,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:22:20,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:22:20,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:22:20,715 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:22:20,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:22:20,715 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:22:20,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:22:20,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:22:20,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:22:20,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:22:20,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:22:20,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:22:20,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:22:20,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:22:20,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:22:20,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:22:20,717 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:22:20,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:22:20,717 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:22:20,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:22:20,718 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:22:20,718 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:22:20,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:22:20,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:22:20,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:22:21,000 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:22:21,000 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:22:21,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-08-30 19:22:22,039 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:22:22,196 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:22:22,196 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-08-30 19:22:22,202 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d5776248/0e2ef7f9dd114ebd9c135ce0967377fd/FLAG07cdbbe1e [2023-08-30 19:22:22,211 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d5776248/0e2ef7f9dd114ebd9c135ce0967377fd [2023-08-30 19:22:22,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:22:22,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:22:22,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:22:22,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:22:22,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:22:22,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc6a1d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22, skipping insertion in model container [2023-08-30 19:22:22,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:22:22,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:22:22,337 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c[2330,2343] [2023-08-30 19:22:22,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:22:22,355 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:22:22,384 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c[2330,2343] [2023-08-30 19:22:22,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:22:22,397 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:22:22,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22 WrapperNode [2023-08-30 19:22:22,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:22:22,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:22:22,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:22:22,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:22:22,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,440 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 169 [2023-08-30 19:22:22,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:22:22,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:22:22,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:22:22,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:22:22,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,473 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:22:22,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:22:22,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:22:22,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:22:22,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22" (1/1) ... [2023-08-30 19:22:22,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:22:22,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:22,511 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 19:22:22,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 19:22:22,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:22:22,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:22:22,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:22:22,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:22:22,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:22:22,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:22:22,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:22:22,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:22:22,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:22:22,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:22:22,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:22:22,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:22:22,568 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 19:22:22,694 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:22:22,695 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:22:22,881 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:22:22,887 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:22:22,887 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 19:22:22,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:22:22 BoogieIcfgContainer [2023-08-30 19:22:22,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:22:22,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:22:22,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:22:22,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:22:22,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:22:22" (1/3) ... [2023-08-30 19:22:22,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e46a82f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:22:22, skipping insertion in model container [2023-08-30 19:22:22,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:22" (2/3) ... [2023-08-30 19:22:22,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e46a82f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:22:22, skipping insertion in model container [2023-08-30 19:22:22,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:22:22" (3/3) ... [2023-08-30 19:22:22,893 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2023-08-30 19:22:22,898 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:22:22,904 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:22:22,904 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:22:22,904 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:22:22,969 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 19:22:23,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 196 transitions, 408 flow [2023-08-30 19:22:23,123 INFO L130 PetriNetUnfolder]: 14/194 cut-off events. [2023-08-30 19:22:23,124 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:22:23,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 194 events. 14/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 288 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-08-30 19:22:23,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 196 transitions, 408 flow [2023-08-30 19:22:23,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 186 transitions, 384 flow [2023-08-30 19:22:23,142 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:22:23,152 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 186 transitions, 384 flow [2023-08-30 19:22:23,154 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 186 transitions, 384 flow [2023-08-30 19:22:23,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 186 transitions, 384 flow [2023-08-30 19:22:23,193 INFO L130 PetriNetUnfolder]: 14/186 cut-off events. [2023-08-30 19:22:23,193 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:22:23,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 186 events. 14/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-08-30 19:22:23,198 INFO L119 LiptonReduction]: Number of co-enabled transitions 7452 [2023-08-30 19:22:27,357 INFO L134 LiptonReduction]: Checked pairs total: 6342 [2023-08-30 19:22:27,357 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-08-30 19:22:27,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:22:27,387 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@255eda83, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:22:27,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 19:22:27,394 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 19:22:27,394 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:22:27,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:27,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:27,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:27,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2015475980, now seen corresponding path program 1 times [2023-08-30 19:22:27,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:27,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190564022] [2023-08-30 19:22:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:27,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:27,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:27,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190564022] [2023-08-30 19:22:27,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190564022] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:22:27,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:22:27,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:22:27,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200922374] [2023-08-30 19:22:27,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:22:27,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:22:27,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:27,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:22:27,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:22:28,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-08-30 19:22:28,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:28,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-08-30 19:22:28,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:28,118 INFO L130 PetriNetUnfolder]: 64/119 cut-off events. [2023-08-30 19:22:28,118 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 19:22:28,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 119 events. 64/119 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 334 event pairs, 3 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 181. Up to 85 conditions per place. [2023-08-30 19:22:28,120 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 23 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2023-08-30 19:22:28,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 35 transitions, 166 flow [2023-08-30 19:22:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:22:28,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:22:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 869 transitions. [2023-08-30 19:22:28,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42184466019417477 [2023-08-30 19:22:28,133 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 869 transitions. [2023-08-30 19:22:28,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 869 transitions. [2023-08-30 19:22:28,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:28,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 869 transitions. [2023-08-30 19:22:28,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,148 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,149 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 5 states and 869 transitions. [2023-08-30 19:22:28,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 35 transitions, 166 flow [2023-08-30 19:22:28,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 19:22:28,153 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 68 flow [2023-08-30 19:22:28,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-30 19:22:28,156 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-30 19:22:28,157 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 68 flow [2023-08-30 19:22:28,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:28,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:28,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:22:28,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:28,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:28,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1883585228, now seen corresponding path program 2 times [2023-08-30 19:22:28,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:28,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375149557] [2023-08-30 19:22:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:28,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:28,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:28,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375149557] [2023-08-30 19:22:28,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375149557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:22:28,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:22:28,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:22:28,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431034351] [2023-08-30 19:22:28,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:22:28,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:22:28,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:28,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:22:28,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:22:28,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-08-30 19:22:28,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:28,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-08-30 19:22:28,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:28,457 INFO L130 PetriNetUnfolder]: 63/111 cut-off events. [2023-08-30 19:22:28,457 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 19:22:28,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 111 events. 63/111 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 283 event pairs, 1 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 316. Up to 85 conditions per place. [2023-08-30 19:22:28,460 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 21 selfloop transitions, 6 changer transitions 5/34 dead transitions. [2023-08-30 19:22:28,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 176 flow [2023-08-30 19:22:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:22:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:22:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 867 transitions. [2023-08-30 19:22:28,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.420873786407767 [2023-08-30 19:22:28,463 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 867 transitions. [2023-08-30 19:22:28,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 867 transitions. [2023-08-30 19:22:28,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:28,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 867 transitions. [2023-08-30 19:22:28,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.4) internal successors, (867), 5 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,469 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,469 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 68 flow. Second operand 5 states and 867 transitions. [2023-08-30 19:22:28,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 176 flow [2023-08-30 19:22:28,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 34 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 19:22:28,472 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 100 flow [2023-08-30 19:22:28,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-30 19:22:28,473 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-08-30 19:22:28,473 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 100 flow [2023-08-30 19:22:28,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:28,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:28,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:22:28,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:28,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:28,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1189875957, now seen corresponding path program 1 times [2023-08-30 19:22:28,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:28,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077438603] [2023-08-30 19:22:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:28,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:28,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:28,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077438603] [2023-08-30 19:22:28,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077438603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:22:28,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:22:28,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:22:28,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737236438] [2023-08-30 19:22:28,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:22:28,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:22:28,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:28,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:22:28,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:22:28,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 412 [2023-08-30 19:22:28,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:28,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 412 [2023-08-30 19:22:28,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:28,645 INFO L130 PetriNetUnfolder]: 84/157 cut-off events. [2023-08-30 19:22:28,647 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 19:22:28,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 157 events. 84/157 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 477 event pairs, 28 based on Foata normal form. 4/147 useless extension candidates. Maximal degree in co-relation 476. Up to 84 conditions per place. [2023-08-30 19:22:28,649 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 32 selfloop transitions, 6 changer transitions 6/44 dead transitions. [2023-08-30 19:22:28,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 44 transitions, 267 flow [2023-08-30 19:22:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:22:28,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:22:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 892 transitions. [2023-08-30 19:22:28,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330097087378641 [2023-08-30 19:22:28,652 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 892 transitions. [2023-08-30 19:22:28,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 892 transitions. [2023-08-30 19:22:28,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:28,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 892 transitions. [2023-08-30 19:22:28,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 178.4) internal successors, (892), 5 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,658 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,658 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 100 flow. Second operand 5 states and 892 transitions. [2023-08-30 19:22:28,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 44 transitions, 267 flow [2023-08-30 19:22:28,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 253 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 19:22:28,662 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 127 flow [2023-08-30 19:22:28,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-30 19:22:28,663 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-08-30 19:22:28,665 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 127 flow [2023-08-30 19:22:28,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:28,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:28,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:22:28,666 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:28,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:28,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972385, now seen corresponding path program 2 times [2023-08-30 19:22:28,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:28,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051321475] [2023-08-30 19:22:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:28,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:28,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:28,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051321475] [2023-08-30 19:22:28,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051321475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:22:28,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:22:28,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:22:28,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653695269] [2023-08-30 19:22:28,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:22:28,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:22:28,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:28,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:22:28,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:22:28,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 412 [2023-08-30 19:22:28,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:28,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 412 [2023-08-30 19:22:28,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:28,808 INFO L130 PetriNetUnfolder]: 102/193 cut-off events. [2023-08-30 19:22:28,809 INFO L131 PetriNetUnfolder]: For 335/335 co-relation queries the response was YES. [2023-08-30 19:22:28,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 193 events. 102/193 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 588 event pairs, 38 based on Foata normal form. 6/179 useless extension candidates. Maximal degree in co-relation 646. Up to 128 conditions per place. [2023-08-30 19:22:28,812 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 33 selfloop transitions, 9 changer transitions 7/49 dead transitions. [2023-08-30 19:22:28,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 354 flow [2023-08-30 19:22:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:22:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:22:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1061 transitions. [2023-08-30 19:22:28,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292071197411003 [2023-08-30 19:22:28,815 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1061 transitions. [2023-08-30 19:22:28,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1061 transitions. [2023-08-30 19:22:28,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:28,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1061 transitions. [2023-08-30 19:22:28,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.83333333333334) internal successors, (1061), 6 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,827 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,827 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 127 flow. Second operand 6 states and 1061 transitions. [2023-08-30 19:22:28,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 354 flow [2023-08-30 19:22:28,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 49 transitions, 334 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 19:22:28,832 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 186 flow [2023-08-30 19:22:28,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-30 19:22:28,834 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-08-30 19:22:28,834 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 186 flow [2023-08-30 19:22:28,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:28,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:28,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:28,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 19:22:28,835 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:28,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:28,835 INFO L85 PathProgramCache]: Analyzing trace with hash 993485807, now seen corresponding path program 1 times [2023-08-30 19:22:28,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:28,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210409844] [2023-08-30 19:22:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:28,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:28,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:28,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210409844] [2023-08-30 19:22:28,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210409844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:28,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685340886] [2023-08-30 19:22:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:28,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:28,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:28,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:28,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 19:22:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 19:22:28,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:28,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:29,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685340886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:29,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:29,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 19:22:29,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626580132] [2023-08-30 19:22:29,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:29,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 19:22:29,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:29,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 19:22:29,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 19:22:29,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:29,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 186 flow. Second operand has 8 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:29,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:29,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:29,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:29,149 INFO L130 PetriNetUnfolder]: 106/197 cut-off events. [2023-08-30 19:22:29,150 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-08-30 19:22:29,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 197 events. 106/197 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 622 event pairs, 20 based on Foata normal form. 6/189 useless extension candidates. Maximal degree in co-relation 770. Up to 96 conditions per place. [2023-08-30 19:22:29,151 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 43 selfloop transitions, 8 changer transitions 1/52 dead transitions. [2023-08-30 19:22:29,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 400 flow [2023-08-30 19:22:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:22:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:22:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 885 transitions. [2023-08-30 19:22:29,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961165048543687 [2023-08-30 19:22:29,153 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 885 transitions. [2023-08-30 19:22:29,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 885 transitions. [2023-08-30 19:22:29,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:29,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 885 transitions. [2023-08-30 19:22:29,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:29,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:29,158 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:29,158 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 186 flow. Second operand 5 states and 885 transitions. [2023-08-30 19:22:29,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 400 flow [2023-08-30 19:22:29,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 377 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 19:22:29,160 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 211 flow [2023-08-30 19:22:29,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-30 19:22:29,161 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-08-30 19:22:29,161 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 211 flow [2023-08-30 19:22:29,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:29,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:29,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:29,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:29,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:29,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:29,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:29,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1800513565, now seen corresponding path program 2 times [2023-08-30 19:22:29,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:29,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238450475] [2023-08-30 19:22:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:29,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:29,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238450475] [2023-08-30 19:22:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238450475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506296259] [2023-08-30 19:22:29,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:22:29,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:29,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:29,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:29,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 19:22:29,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:22:29,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:29,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 19:22:29,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:29,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:29,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506296259] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:29,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:29,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 19:22:29,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725962704] [2023-08-30 19:22:29,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:29,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:22:29,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:29,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:22:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:22:29,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:29,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 211 flow. Second operand has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:29,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:29,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:29,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:29,699 INFO L130 PetriNetUnfolder]: 124/235 cut-off events. [2023-08-30 19:22:29,699 INFO L131 PetriNetUnfolder]: For 564/564 co-relation queries the response was YES. [2023-08-30 19:22:29,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 235 events. 124/235 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 806 event pairs, 16 based on Foata normal form. 6/227 useless extension candidates. Maximal degree in co-relation 773. Up to 104 conditions per place. [2023-08-30 19:22:29,701 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 54 selfloop transitions, 15 changer transitions 2/71 dead transitions. [2023-08-30 19:22:29,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 71 transitions, 537 flow [2023-08-30 19:22:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:22:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:22:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1413 transitions. [2023-08-30 19:22:29,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42870145631067963 [2023-08-30 19:22:29,704 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1413 transitions. [2023-08-30 19:22:29,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1413 transitions. [2023-08-30 19:22:29,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:29,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1413 transitions. [2023-08-30 19:22:29,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 176.625) internal successors, (1413), 8 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:29,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:29,710 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:29,711 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 211 flow. Second operand 8 states and 1413 transitions. [2023-08-30 19:22:29,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 71 transitions, 537 flow [2023-08-30 19:22:29,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 522 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 19:22:29,713 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 302 flow [2023-08-30 19:22:29,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=302, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2023-08-30 19:22:29,714 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-08-30 19:22:29,714 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 302 flow [2023-08-30 19:22:29,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:29,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:29,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:29,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 19:22:29,919 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,SelfDestructingSolverStorable5 [2023-08-30 19:22:29,920 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:29,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 113238829, now seen corresponding path program 3 times [2023-08-30 19:22:29,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:29,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979954853] [2023-08-30 19:22:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:29,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:29,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:29,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979954853] [2023-08-30 19:22:29,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979954853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:29,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135486221] [2023-08-30 19:22:29,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:22:29,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:29,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:29,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:30,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 19:22:30,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:22:30,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:30,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 19:22:30,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:30,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:30,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135486221] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:30,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:30,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 19:22:30,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621933720] [2023-08-30 19:22:30,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:30,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 19:22:30,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 19:22:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 19:22:30,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:30,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 302 flow. Second operand has 8 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:30,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:30,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:30,205 INFO L130 PetriNetUnfolder]: 130/245 cut-off events. [2023-08-30 19:22:30,205 INFO L131 PetriNetUnfolder]: For 761/761 co-relation queries the response was YES. [2023-08-30 19:22:30,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 245 events. 130/245 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 847 event pairs, 16 based on Foata normal form. 4/233 useless extension candidates. Maximal degree in co-relation 855. Up to 104 conditions per place. [2023-08-30 19:22:30,206 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 40 selfloop transitions, 13 changer transitions 1/54 dead transitions. [2023-08-30 19:22:30,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 505 flow [2023-08-30 19:22:30,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:22:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:22:30,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 881 transitions. [2023-08-30 19:22:30,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42766990291262136 [2023-08-30 19:22:30,209 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 881 transitions. [2023-08-30 19:22:30,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 881 transitions. [2023-08-30 19:22:30,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:30,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 881 transitions. [2023-08-30 19:22:30,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,213 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,213 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 302 flow. Second operand 5 states and 881 transitions. [2023-08-30 19:22:30,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 505 flow [2023-08-30 19:22:30,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 482 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 19:22:30,217 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 343 flow [2023-08-30 19:22:30,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2023-08-30 19:22:30,218 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-08-30 19:22:30,218 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 343 flow [2023-08-30 19:22:30,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:30,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:30,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:30,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:30,423 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:30,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:30,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1270574027, now seen corresponding path program 3 times [2023-08-30 19:22:30,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:30,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012542035] [2023-08-30 19:22:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:30,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:30,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:30,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012542035] [2023-08-30 19:22:30,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012542035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:22:30,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:22:30,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:22:30,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691204832] [2023-08-30 19:22:30,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:22:30,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:22:30,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:30,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:22:30,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:22:30,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 412 [2023-08-30 19:22:30,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:30,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 412 [2023-08-30 19:22:30,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:30,563 INFO L130 PetriNetUnfolder]: 122/229 cut-off events. [2023-08-30 19:22:30,564 INFO L131 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2023-08-30 19:22:30,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 229 events. 122/229 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 763 event pairs, 40 based on Foata normal form. 6/219 useless extension candidates. Maximal degree in co-relation 921. Up to 160 conditions per place. [2023-08-30 19:22:30,565 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 36 selfloop transitions, 11 changer transitions 9/56 dead transitions. [2023-08-30 19:22:30,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 512 flow [2023-08-30 19:22:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:22:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:22:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1062 transitions. [2023-08-30 19:22:30,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961165048543687 [2023-08-30 19:22:30,568 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1062 transitions. [2023-08-30 19:22:30,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1062 transitions. [2023-08-30 19:22:30,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:30,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1062 transitions. [2023-08-30 19:22:30,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,573 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,573 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 343 flow. Second operand 6 states and 1062 transitions. [2023-08-30 19:22:30,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 512 flow [2023-08-30 19:22:30,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 495 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 19:22:30,577 INFO L231 Difference]: Finished difference. Result has 56 places, 34 transitions, 296 flow [2023-08-30 19:22:30,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=56, PETRI_TRANSITIONS=34} [2023-08-30 19:22:30,579 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-08-30 19:22:30,579 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 34 transitions, 296 flow [2023-08-30 19:22:30,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:30,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:30,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 19:22:30,580 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:30,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash -691740739, now seen corresponding path program 4 times [2023-08-30 19:22:30,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:30,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15440192] [2023-08-30 19:22:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:30,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:30,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:30,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15440192] [2023-08-30 19:22:30,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15440192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:30,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199671077] [2023-08-30 19:22:30,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:22:30,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:30,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:30,617 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:30,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 19:22:30,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:22:30,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:30,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 19:22:30,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:30,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:30,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199671077] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:30,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:30,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 19:22:30,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752558170] [2023-08-30 19:22:30,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:30,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:22:30,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:30,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:22:30,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:22:30,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:30,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 34 transitions, 296 flow. Second operand has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:30,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:30,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:30,849 INFO L130 PetriNetUnfolder]: 122/219 cut-off events. [2023-08-30 19:22:30,850 INFO L131 PetriNetUnfolder]: For 783/783 co-relation queries the response was YES. [2023-08-30 19:22:30,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 219 events. 122/219 cut-off events. For 783/783 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 669 event pairs, 43 based on Foata normal form. 4/205 useless extension candidates. Maximal degree in co-relation 985. Up to 161 conditions per place. [2023-08-30 19:22:30,851 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 37 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2023-08-30 19:22:30,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 48 transitions, 449 flow [2023-08-30 19:22:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:22:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:22:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 880 transitions. [2023-08-30 19:22:30,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42718446601941745 [2023-08-30 19:22:30,854 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 880 transitions. [2023-08-30 19:22:30,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 880 transitions. [2023-08-30 19:22:30,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:30,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 880 transitions. [2023-08-30 19:22:30,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,858 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,858 INFO L175 Difference]: Start difference. First operand has 56 places, 34 transitions, 296 flow. Second operand 5 states and 880 transitions. [2023-08-30 19:22:30,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 48 transitions, 449 flow [2023-08-30 19:22:30,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 400 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-30 19:22:30,861 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 285 flow [2023-08-30 19:22:30,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-08-30 19:22:30,861 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2023-08-30 19:22:30,861 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 285 flow [2023-08-30 19:22:30,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:30,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:30,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:30,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:31,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:31,067 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:31,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash -935224503, now seen corresponding path program 4 times [2023-08-30 19:22:31,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:31,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594868474] [2023-08-30 19:22:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:31,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:31,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:31,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594868474] [2023-08-30 19:22:31,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594868474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:31,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358718745] [2023-08-30 19:22:31,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:22:31,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:31,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:31,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 19:22:31,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:22:31,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:31,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 19:22:31,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:31,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:31,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358718745] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:31,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:31,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 19:22:31,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443853267] [2023-08-30 19:22:31,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:31,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:22:31,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:31,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:22:31,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:22:31,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:31,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 285 flow. Second operand has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:31,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:31,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:31,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:31,324 INFO L130 PetriNetUnfolder]: 114/203 cut-off events. [2023-08-30 19:22:31,324 INFO L131 PetriNetUnfolder]: For 575/575 co-relation queries the response was YES. [2023-08-30 19:22:31,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 203 events. 114/203 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 589 event pairs, 37 based on Foata normal form. 6/191 useless extension candidates. Maximal degree in co-relation 900. Up to 153 conditions per place. [2023-08-30 19:22:31,326 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 33 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2023-08-30 19:22:31,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 408 flow [2023-08-30 19:22:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:22:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:22:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 877 transitions. [2023-08-30 19:22:31,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42572815533980585 [2023-08-30 19:22:31,335 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 877 transitions. [2023-08-30 19:22:31,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 877 transitions. [2023-08-30 19:22:31,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:31,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 877 transitions. [2023-08-30 19:22:31,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.4) internal successors, (877), 5 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:31,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:31,340 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:31,340 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 285 flow. Second operand 5 states and 877 transitions. [2023-08-30 19:22:31,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 408 flow [2023-08-30 19:22:31,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 45 transitions, 392 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 19:22:31,342 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 282 flow [2023-08-30 19:22:31,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2023-08-30 19:22:31,343 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-08-30 19:22:31,343 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 282 flow [2023-08-30 19:22:31,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:31,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:31,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:31,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 19:22:31,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 19:22:31,549 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:31,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:31,549 INFO L85 PathProgramCache]: Analyzing trace with hash 899158593, now seen corresponding path program 5 times [2023-08-30 19:22:31,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:31,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212555597] [2023-08-30 19:22:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:31,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:31,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:31,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212555597] [2023-08-30 19:22:31,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212555597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:31,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043154217] [2023-08-30 19:22:31,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:22:31,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:31,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:31,589 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:31,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 19:22:31,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:22:31,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:31,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 19:22:31,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:31,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:31,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043154217] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:31,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:31,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 19:22:31,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552766071] [2023-08-30 19:22:31,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:31,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:22:31,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:22:31,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:22:31,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:31,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 282 flow. Second operand has 10 states, 10 states have (on average 171.5) internal successors, (1715), 10 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:31,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:31,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:31,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:31,822 INFO L130 PetriNetUnfolder]: 110/193 cut-off events. [2023-08-30 19:22:31,822 INFO L131 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2023-08-30 19:22:31,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 193 events. 110/193 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 569 event pairs, 9 based on Foata normal form. 4/181 useless extension candidates. Maximal degree in co-relation 878. Up to 86 conditions per place. [2023-08-30 19:22:31,824 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 37 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2023-08-30 19:22:31,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 474 flow [2023-08-30 19:22:31,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:22:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:22:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1396 transitions. [2023-08-30 19:22:31,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42354368932038833 [2023-08-30 19:22:31,827 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1396 transitions. [2023-08-30 19:22:31,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1396 transitions. [2023-08-30 19:22:31,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:31,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1396 transitions. [2023-08-30 19:22:31,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 174.5) internal successors, (1396), 8 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:31,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:31,833 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:31,833 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 282 flow. Second operand 8 states and 1396 transitions. [2023-08-30 19:22:31,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 474 flow [2023-08-30 19:22:31,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 426 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-30 19:22:31,835 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 277 flow [2023-08-30 19:22:31,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=277, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-08-30 19:22:31,836 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2023-08-30 19:22:31,836 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 277 flow [2023-08-30 19:22:31,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.5) internal successors, (1715), 10 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:31,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:31,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:31,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:32,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:32,041 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:32,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:32,042 INFO L85 PathProgramCache]: Analyzing trace with hash -538177452, now seen corresponding path program 1 times [2023-08-30 19:22:32,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:32,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100503334] [2023-08-30 19:22:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:32,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:32,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:32,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100503334] [2023-08-30 19:22:32,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100503334] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:32,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932847728] [2023-08-30 19:22:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:32,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:32,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:32,256 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:32,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 19:22:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:32,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 19:22:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:32,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:32,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932847728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:32,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:32,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 19:22:32,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454917197] [2023-08-30 19:22:32,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:32,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:22:32,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:32,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:22:32,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:22:32,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:22:32,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 277 flow. Second operand has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:32,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:32,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:22:32,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:32,945 INFO L130 PetriNetUnfolder]: 132/238 cut-off events. [2023-08-30 19:22:32,945 INFO L131 PetriNetUnfolder]: For 578/598 co-relation queries the response was YES. [2023-08-30 19:22:32,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 238 events. 132/238 cut-off events. For 578/598 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 814 event pairs, 6 based on Foata normal form. 11/242 useless extension candidates. Maximal degree in co-relation 1030. Up to 167 conditions per place. [2023-08-30 19:22:32,946 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 36 selfloop transitions, 17 changer transitions 5/64 dead transitions. [2023-08-30 19:22:32,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 519 flow [2023-08-30 19:22:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:22:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:22:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1167 transitions. [2023-08-30 19:22:32,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40464632454923716 [2023-08-30 19:22:32,950 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1167 transitions. [2023-08-30 19:22:32,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1167 transitions. [2023-08-30 19:22:32,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:32,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1167 transitions. [2023-08-30 19:22:32,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.71428571428572) internal successors, (1167), 7 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:32,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:32,955 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:32,956 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 277 flow. Second operand 7 states and 1167 transitions. [2023-08-30 19:22:32,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 519 flow [2023-08-30 19:22:32,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 470 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-30 19:22:32,961 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 370 flow [2023-08-30 19:22:32,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=370, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-30 19:22:32,962 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2023-08-30 19:22:32,962 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 370 flow [2023-08-30 19:22:32,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:32,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:32,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:32,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:33,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:33,168 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:33,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:33,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1242983908, now seen corresponding path program 2 times [2023-08-30 19:22:33,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:33,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573077829] [2023-08-30 19:22:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:33,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:33,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:33,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573077829] [2023-08-30 19:22:33,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573077829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:33,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609294409] [2023-08-30 19:22:33,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:22:33,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:33,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:33,419 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:33,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 19:22:33,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:22:33,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:33,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 19:22:33,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:33,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:33,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609294409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:33,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:33,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 19:22:33,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898237066] [2023-08-30 19:22:33,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:33,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:22:33,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:22:33,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:22:33,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:22:33,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 370 flow. Second operand has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:33,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:33,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:22:33,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:33,942 INFO L130 PetriNetUnfolder]: 144/264 cut-off events. [2023-08-30 19:22:33,942 INFO L131 PetriNetUnfolder]: For 828/858 co-relation queries the response was YES. [2023-08-30 19:22:33,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 264 events. 144/264 cut-off events. For 828/858 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 950 event pairs, 8 based on Foata normal form. 11/268 useless extension candidates. Maximal degree in co-relation 1222. Up to 171 conditions per place. [2023-08-30 19:22:33,943 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 40 selfloop transitions, 20 changer transitions 5/71 dead transitions. [2023-08-30 19:22:33,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 604 flow [2023-08-30 19:22:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:22:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:22:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1172 transitions. [2023-08-30 19:22:33,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.406380027739251 [2023-08-30 19:22:33,946 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1172 transitions. [2023-08-30 19:22:33,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1172 transitions. [2023-08-30 19:22:33,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:33,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1172 transitions. [2023-08-30 19:22:33,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.42857142857142) internal successors, (1172), 7 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:33,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:33,951 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:33,951 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 370 flow. Second operand 7 states and 1172 transitions. [2023-08-30 19:22:33,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 604 flow [2023-08-30 19:22:33,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 571 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-30 19:22:33,954 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 439 flow [2023-08-30 19:22:33,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-08-30 19:22:33,955 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-08-30 19:22:33,955 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 439 flow [2023-08-30 19:22:33,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:33,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:33,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:33,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:34,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 19:22:34,161 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:34,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:34,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278278, now seen corresponding path program 3 times [2023-08-30 19:22:34,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:34,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680332475] [2023-08-30 19:22:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:34,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:34,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:34,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680332475] [2023-08-30 19:22:34,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680332475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:34,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925684889] [2023-08-30 19:22:34,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:22:34,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:34,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:34,426 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:34,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 19:22:34,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:22:34,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 19:22:34,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:34,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:34,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925684889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:34,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:34,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 19:22:34,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074698380] [2023-08-30 19:22:34,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:34,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:22:34,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:22:34,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:22:34,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:22:34,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 439 flow. Second operand has 12 states, 12 states have (on average 163.66666666666666) internal successors, (1964), 12 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:34,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:34,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:22:34,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:35,040 INFO L130 PetriNetUnfolder]: 141/255 cut-off events. [2023-08-30 19:22:35,040 INFO L131 PetriNetUnfolder]: For 1187/1213 co-relation queries the response was YES. [2023-08-30 19:22:35,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 255 events. 141/255 cut-off events. For 1187/1213 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 900 event pairs, 8 based on Foata normal form. 9/257 useless extension candidates. Maximal degree in co-relation 1269. Up to 171 conditions per place. [2023-08-30 19:22:35,042 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 36 selfloop transitions, 21 changer transitions 5/68 dead transitions. [2023-08-30 19:22:35,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 636 flow [2023-08-30 19:22:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:22:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:22:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1168 transitions. [2023-08-30 19:22:35,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40499306518723993 [2023-08-30 19:22:35,045 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1168 transitions. [2023-08-30 19:22:35,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1168 transitions. [2023-08-30 19:22:35,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:35,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1168 transitions. [2023-08-30 19:22:35,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.85714285714286) internal successors, (1168), 7 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:35,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:35,050 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:35,050 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 439 flow. Second operand 7 states and 1168 transitions. [2023-08-30 19:22:35,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 636 flow [2023-08-30 19:22:35,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 68 transitions, 578 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-08-30 19:22:35,054 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 471 flow [2023-08-30 19:22:35,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=471, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-08-30 19:22:35,055 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 45 predicate places. [2023-08-30 19:22:35,055 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 471 flow [2023-08-30 19:22:35,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.66666666666666) internal successors, (1964), 12 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:35,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:35,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:35,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:35,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 19:22:35,261 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:35,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:35,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1742862228, now seen corresponding path program 4 times [2023-08-30 19:22:35,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:35,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750568640] [2023-08-30 19:22:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:35,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:35,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:35,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750568640] [2023-08-30 19:22:35,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750568640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:35,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256559558] [2023-08-30 19:22:35,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:22:35,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:35,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:35,597 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:35,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 19:22:35,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:22:35,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:35,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 19:22:35,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:35,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:35,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256559558] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:35,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:35,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 19:22:35,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793615708] [2023-08-30 19:22:35,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:35,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:22:35,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:22:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:22:36,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:22:36,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 471 flow. Second operand has 10 states, 10 states have (on average 163.5) internal successors, (1635), 10 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:36,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:36,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:22:36,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:36,177 INFO L130 PetriNetUnfolder]: 166/298 cut-off events. [2023-08-30 19:22:36,178 INFO L131 PetriNetUnfolder]: For 1428/1454 co-relation queries the response was YES. [2023-08-30 19:22:36,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1559 conditions, 298 events. 166/298 cut-off events. For 1428/1454 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1112 event pairs, 10 based on Foata normal form. 9/300 useless extension candidates. Maximal degree in co-relation 1533. Up to 244 conditions per place. [2023-08-30 19:22:36,180 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 44 selfloop transitions, 17 changer transitions 5/72 dead transitions. [2023-08-30 19:22:36,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 723 flow [2023-08-30 19:22:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:22:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:22:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1159 transitions. [2023-08-30 19:22:36,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40187239944521497 [2023-08-30 19:22:36,183 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1159 transitions. [2023-08-30 19:22:36,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1159 transitions. [2023-08-30 19:22:36,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:36,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1159 transitions. [2023-08-30 19:22:36,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 165.57142857142858) internal successors, (1159), 7 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:36,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:36,188 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:36,188 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 471 flow. Second operand 7 states and 1159 transitions. [2023-08-30 19:22:36,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 723 flow [2023-08-30 19:22:36,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 674 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-30 19:22:36,192 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 574 flow [2023-08-30 19:22:36,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=574, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2023-08-30 19:22:36,192 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 49 predicate places. [2023-08-30 19:22:36,192 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 574 flow [2023-08-30 19:22:36,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.5) internal successors, (1635), 10 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:36,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:36,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:36,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:36,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 19:22:36,398 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:36,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:36,398 INFO L85 PathProgramCache]: Analyzing trace with hash -433241830, now seen corresponding path program 5 times [2023-08-30 19:22:36,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:36,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713696942] [2023-08-30 19:22:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:36,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:36,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:36,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713696942] [2023-08-30 19:22:36,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713696942] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:36,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719342865] [2023-08-30 19:22:36,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:22:36,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:36,593 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:36,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 19:22:36,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:22:36,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:36,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 19:22:36,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:36,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:36,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719342865] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:36,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:36,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 19:22:36,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406423820] [2023-08-30 19:22:36,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:36,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:22:36,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:36,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:22:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:22:37,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:22:37,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 574 flow. Second operand has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:37,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:37,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:22:37,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:37,219 INFO L130 PetriNetUnfolder]: 180/326 cut-off events. [2023-08-30 19:22:37,219 INFO L131 PetriNetUnfolder]: For 1850/1876 co-relation queries the response was YES. [2023-08-30 19:22:37,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 326 events. 180/326 cut-off events. For 1850/1876 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1257 event pairs, 14 based on Foata normal form. 9/328 useless extension candidates. Maximal degree in co-relation 1754. Up to 248 conditions per place. [2023-08-30 19:22:37,222 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 50 selfloop transitions, 20 changer transitions 5/81 dead transitions. [2023-08-30 19:22:37,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 81 transitions, 837 flow [2023-08-30 19:22:37,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:22:37,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:22:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1166 transitions. [2023-08-30 19:22:37,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042995839112344 [2023-08-30 19:22:37,225 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1166 transitions. [2023-08-30 19:22:37,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1166 transitions. [2023-08-30 19:22:37,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:37,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1166 transitions. [2023-08-30 19:22:37,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:37,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:37,231 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:37,231 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 574 flow. Second operand 7 states and 1166 transitions. [2023-08-30 19:22:37,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 81 transitions, 837 flow [2023-08-30 19:22:37,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 796 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-08-30 19:22:37,239 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 651 flow [2023-08-30 19:22:37,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=651, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-08-30 19:22:37,240 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2023-08-30 19:22:37,241 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 651 flow [2023-08-30 19:22:37,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:37,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:37,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:37,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:37,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 19:22:37,446 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:37,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:37,447 INFO L85 PathProgramCache]: Analyzing trace with hash -405536200, now seen corresponding path program 6 times [2023-08-30 19:22:37,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:37,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823938971] [2023-08-30 19:22:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:37,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:37,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:37,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823938971] [2023-08-30 19:22:37,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823938971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:37,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369250358] [2023-08-30 19:22:37,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:22:37,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:37,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:37,657 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:37,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 19:22:37,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:22:37,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:37,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 19:22:37,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:37,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:37,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369250358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:37,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:37,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 19:22:37,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026860223] [2023-08-30 19:22:37,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:37,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:22:37,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:37,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:22:37,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:22:38,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:22:38,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 651 flow. Second operand has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:38,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:38,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:22:38,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:38,217 INFO L130 PetriNetUnfolder]: 177/317 cut-off events. [2023-08-30 19:22:38,217 INFO L131 PetriNetUnfolder]: For 2219/2245 co-relation queries the response was YES. [2023-08-30 19:22:38,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 317 events. 177/317 cut-off events. For 2219/2245 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1211 event pairs, 14 based on Foata normal form. 9/319 useless extension candidates. Maximal degree in co-relation 1777. Up to 248 conditions per place. [2023-08-30 19:22:38,219 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 48 selfloop transitions, 21 changer transitions 5/80 dead transitions. [2023-08-30 19:22:38,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 80 transitions, 874 flow [2023-08-30 19:22:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:22:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:22:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1164 transitions. [2023-08-30 19:22:38,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40360610263522884 [2023-08-30 19:22:38,223 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1164 transitions. [2023-08-30 19:22:38,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1164 transitions. [2023-08-30 19:22:38,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:38,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1164 transitions. [2023-08-30 19:22:38,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.28571428571428) internal successors, (1164), 7 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:38,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:38,229 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:38,229 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 651 flow. Second operand 7 states and 1164 transitions. [2023-08-30 19:22:38,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 80 transitions, 874 flow [2023-08-30 19:22:38,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 80 transitions, 794 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-08-30 19:22:38,234 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 671 flow [2023-08-30 19:22:38,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=671, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2023-08-30 19:22:38,235 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-08-30 19:22:38,235 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 671 flow [2023-08-30 19:22:38,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:38,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:38,236 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:38,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:38,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 19:22:38,441 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:38,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:38,442 INFO L85 PathProgramCache]: Analyzing trace with hash -292778433, now seen corresponding path program 7 times [2023-08-30 19:22:38,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:38,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415911180] [2023-08-30 19:22:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:38,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:38,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:38,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415911180] [2023-08-30 19:22:38,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415911180] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:38,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912904180] [2023-08-30 19:22:38,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:22:38,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:38,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:38,522 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:38,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 19:22:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:38,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:38,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:38,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:38,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912904180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:38,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:38,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 19:22:38,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346164249] [2023-08-30 19:22:38,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:38,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:22:38,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:22:38,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:22:38,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:38,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 671 flow. Second operand has 11 states, 11 states have (on average 171.1818181818182) internal successors, (1883), 11 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:38,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:38,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:38,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:38,851 INFO L130 PetriNetUnfolder]: 228/403 cut-off events. [2023-08-30 19:22:38,852 INFO L131 PetriNetUnfolder]: For 2406/2406 co-relation queries the response was YES. [2023-08-30 19:22:38,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 403 events. 228/403 cut-off events. For 2406/2406 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1569 event pairs, 15 based on Foata normal form. 6/409 useless extension candidates. Maximal degree in co-relation 2221. Up to 154 conditions per place. [2023-08-30 19:22:38,855 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 75 selfloop transitions, 28 changer transitions 0/103 dead transitions. [2023-08-30 19:22:38,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 1146 flow [2023-08-30 19:22:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:22:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:22:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1236 transitions. [2023-08-30 19:22:38,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-30 19:22:38,857 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1236 transitions. [2023-08-30 19:22:38,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1236 transitions. [2023-08-30 19:22:38,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:38,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1236 transitions. [2023-08-30 19:22:38,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.57142857142858) internal successors, (1236), 7 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:38,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:38,862 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:38,862 INFO L175 Difference]: Start difference. First operand has 80 places, 67 transitions, 671 flow. Second operand 7 states and 1236 transitions. [2023-08-30 19:22:38,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 1146 flow [2023-08-30 19:22:38,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 103 transitions, 1081 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-30 19:22:38,874 INFO L231 Difference]: Finished difference. Result has 85 places, 71 transitions, 764 flow [2023-08-30 19:22:38,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=764, PETRI_PLACES=85, PETRI_TRANSITIONS=71} [2023-08-30 19:22:38,874 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-08-30 19:22:38,874 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 71 transitions, 764 flow [2023-08-30 19:22:38,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.1818181818182) internal successors, (1883), 11 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:38,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:38,875 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:38,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 19:22:39,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 19:22:39,080 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:39,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash 588770887, now seen corresponding path program 8 times [2023-08-30 19:22:39,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:39,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906273042] [2023-08-30 19:22:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:39,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:39,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:39,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906273042] [2023-08-30 19:22:39,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906273042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:39,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487023523] [2023-08-30 19:22:39,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:22:39,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:39,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:39,167 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:39,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 19:22:39,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:22:39,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:39,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:39,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:39,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:39,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487023523] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:39,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:39,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 19:22:39,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513414965] [2023-08-30 19:22:39,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:39,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:22:39,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:39,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:22:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:22:39,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:39,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 71 transitions, 764 flow. Second operand has 11 states, 11 states have (on average 171.36363636363637) internal successors, (1885), 11 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:39,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:39,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:39,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:39,492 INFO L130 PetriNetUnfolder]: 230/413 cut-off events. [2023-08-30 19:22:39,493 INFO L131 PetriNetUnfolder]: For 3259/3259 co-relation queries the response was YES. [2023-08-30 19:22:39,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2437 conditions, 413 events. 230/413 cut-off events. For 3259/3259 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1669 event pairs, 35 based on Foata normal form. 4/417 useless extension candidates. Maximal degree in co-relation 2400. Up to 153 conditions per place. [2023-08-30 19:22:39,496 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 65 selfloop transitions, 43 changer transitions 10/118 dead transitions. [2023-08-30 19:22:39,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 118 transitions, 1335 flow [2023-08-30 19:22:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:22:39,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:22:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1921 transitions. [2023-08-30 19:22:39,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238746690203001 [2023-08-30 19:22:39,499 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1921 transitions. [2023-08-30 19:22:39,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1921 transitions. [2023-08-30 19:22:39,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:39,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1921 transitions. [2023-08-30 19:22:39,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 174.63636363636363) internal successors, (1921), 11 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:39,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:39,506 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:39,507 INFO L175 Difference]: Start difference. First operand has 85 places, 71 transitions, 764 flow. Second operand 11 states and 1921 transitions. [2023-08-30 19:22:39,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 118 transitions, 1335 flow [2023-08-30 19:22:39,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 118 transitions, 1288 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-30 19:22:39,517 INFO L231 Difference]: Finished difference. Result has 98 places, 83 transitions, 1012 flow [2023-08-30 19:22:39,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1012, PETRI_PLACES=98, PETRI_TRANSITIONS=83} [2023-08-30 19:22:39,518 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 78 predicate places. [2023-08-30 19:22:39,518 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 83 transitions, 1012 flow [2023-08-30 19:22:39,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.36363636363637) internal successors, (1885), 11 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:39,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:39,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:39,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:39,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:39,725 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:39,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:39,725 INFO L85 PathProgramCache]: Analyzing trace with hash 84514537, now seen corresponding path program 9 times [2023-08-30 19:22:39,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:39,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304143042] [2023-08-30 19:22:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:39,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:39,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:39,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304143042] [2023-08-30 19:22:39,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304143042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:39,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576686560] [2023-08-30 19:22:39,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:22:39,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:39,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:39,801 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:39,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 19:22:39,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:22:39,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:39,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:39,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:39,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:39,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576686560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:39,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:39,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 19:22:39,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689551159] [2023-08-30 19:22:39,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:39,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:22:39,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:22:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:22:39,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:39,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 83 transitions, 1012 flow. Second operand has 13 states, 13 states have (on average 171.15384615384616) internal successors, (2225), 13 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:39,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:39,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:39,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:40,273 INFO L130 PetriNetUnfolder]: 265/492 cut-off events. [2023-08-30 19:22:40,274 INFO L131 PetriNetUnfolder]: For 4464/4464 co-relation queries the response was YES. [2023-08-30 19:22:40,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 492 events. 265/492 cut-off events. For 4464/4464 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2134 event pairs, 37 based on Foata normal form. 8/500 useless extension candidates. Maximal degree in co-relation 3028. Up to 159 conditions per place. [2023-08-30 19:22:40,277 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 91 selfloop transitions, 64 changer transitions 6/161 dead transitions. [2023-08-30 19:22:40,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1910 flow [2023-08-30 19:22:40,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 19:22:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 19:22:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3138 transitions. [2023-08-30 19:22:40,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231391585760518 [2023-08-30 19:22:40,281 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3138 transitions. [2023-08-30 19:22:40,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3138 transitions. [2023-08-30 19:22:40,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:40,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3138 transitions. [2023-08-30 19:22:40,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 174.33333333333334) internal successors, (3138), 18 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:40,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:40,295 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:40,295 INFO L175 Difference]: Start difference. First operand has 98 places, 83 transitions, 1012 flow. Second operand 18 states and 3138 transitions. [2023-08-30 19:22:40,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1910 flow [2023-08-30 19:22:40,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 161 transitions, 1767 flow, removed 45 selfloop flow, removed 8 redundant places. [2023-08-30 19:22:40,307 INFO L231 Difference]: Finished difference. Result has 111 places, 103 transitions, 1356 flow [2023-08-30 19:22:40,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1356, PETRI_PLACES=111, PETRI_TRANSITIONS=103} [2023-08-30 19:22:40,308 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2023-08-30 19:22:40,308 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 103 transitions, 1356 flow [2023-08-30 19:22:40,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.15384615384616) internal successors, (2225), 13 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:40,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:40,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:40,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-30 19:22:40,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:40,514 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:40,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:40,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1635873767, now seen corresponding path program 10 times [2023-08-30 19:22:40,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:40,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828354258] [2023-08-30 19:22:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:40,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:40,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:40,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828354258] [2023-08-30 19:22:40,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828354258] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:40,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722080080] [2023-08-30 19:22:40,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:22:40,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:40,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:40,590 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:40,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 19:22:40,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:22:40,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:40,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:40,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722080080] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:40,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:40,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 19:22:40,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004663897] [2023-08-30 19:22:40,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:40,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:22:40,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:22:40,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:22:40,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:40,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 103 transitions, 1356 flow. Second operand has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:40,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:40,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:40,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:41,077 INFO L130 PetriNetUnfolder]: 316/591 cut-off events. [2023-08-30 19:22:41,077 INFO L131 PetriNetUnfolder]: For 6497/6497 co-relation queries the response was YES. [2023-08-30 19:22:41,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3908 conditions, 591 events. 316/591 cut-off events. For 6497/6497 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2656 event pairs, 19 based on Foata normal form. 18/609 useless extension candidates. Maximal degree in co-relation 3866. Up to 303 conditions per place. [2023-08-30 19:22:41,081 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 119 selfloop transitions, 50 changer transitions 0/169 dead transitions. [2023-08-30 19:22:41,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 169 transitions, 2245 flow [2023-08-30 19:22:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:22:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:22:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2459 transitions. [2023-08-30 19:22:41,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263176144244105 [2023-08-30 19:22:41,084 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2459 transitions. [2023-08-30 19:22:41,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2459 transitions. [2023-08-30 19:22:41,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:41,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2459 transitions. [2023-08-30 19:22:41,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 175.64285714285714) internal successors, (2459), 14 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:41,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:41,094 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:41,094 INFO L175 Difference]: Start difference. First operand has 111 places, 103 transitions, 1356 flow. Second operand 14 states and 2459 transitions. [2023-08-30 19:22:41,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 169 transitions, 2245 flow [2023-08-30 19:22:41,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 169 transitions, 2079 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-08-30 19:22:41,109 INFO L231 Difference]: Finished difference. Result has 120 places, 117 transitions, 1586 flow [2023-08-30 19:22:41,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1586, PETRI_PLACES=120, PETRI_TRANSITIONS=117} [2023-08-30 19:22:41,110 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-08-30 19:22:41,110 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 117 transitions, 1586 flow [2023-08-30 19:22:41,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:41,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:41,111 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:41,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:41,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:41,335 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:41,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1629563245, now seen corresponding path program 11 times [2023-08-30 19:22:41,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:41,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395789885] [2023-08-30 19:22:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:41,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:41,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:41,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395789885] [2023-08-30 19:22:41,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395789885] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:41,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922546091] [2023-08-30 19:22:41,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:22:41,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:41,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:41,389 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:41,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 19:22:41,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:22:41,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:41,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:41,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:41,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:41,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922546091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:41,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:41,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 19:22:41,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603712485] [2023-08-30 19:22:41,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:41,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:22:41,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:41,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:22:41,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:22:41,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:41,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 117 transitions, 1586 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:41,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:41,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:41,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:41,856 INFO L130 PetriNetUnfolder]: 391/758 cut-off events. [2023-08-30 19:22:41,856 INFO L131 PetriNetUnfolder]: For 10396/10396 co-relation queries the response was YES. [2023-08-30 19:22:41,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5484 conditions, 758 events. 391/758 cut-off events. For 10396/10396 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3764 event pairs, 81 based on Foata normal form. 8/766 useless extension candidates. Maximal degree in co-relation 5438. Up to 329 conditions per place. [2023-08-30 19:22:41,862 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 116 selfloop transitions, 62 changer transitions 0/178 dead transitions. [2023-08-30 19:22:41,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 178 transitions, 2519 flow [2023-08-30 19:22:41,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:22:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:22:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2288 transitions. [2023-08-30 19:22:41,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42718446601941745 [2023-08-30 19:22:41,865 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2288 transitions. [2023-08-30 19:22:41,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2288 transitions. [2023-08-30 19:22:41,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:41,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2288 transitions. [2023-08-30 19:22:41,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 176.0) internal successors, (2288), 13 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:41,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:41,872 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:41,873 INFO L175 Difference]: Start difference. First operand has 120 places, 117 transitions, 1586 flow. Second operand 13 states and 2288 transitions. [2023-08-30 19:22:41,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 178 transitions, 2519 flow [2023-08-30 19:22:41,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 2287 flow, removed 96 selfloop flow, removed 5 redundant places. [2023-08-30 19:22:41,895 INFO L231 Difference]: Finished difference. Result has 133 places, 131 transitions, 1857 flow [2023-08-30 19:22:41,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1857, PETRI_PLACES=133, PETRI_TRANSITIONS=131} [2023-08-30 19:22:41,896 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2023-08-30 19:22:41,896 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 131 transitions, 1857 flow [2023-08-30 19:22:41,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:41,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:41,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:41,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:42,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:42,102 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:42,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:42,102 INFO L85 PathProgramCache]: Analyzing trace with hash 608008723, now seen corresponding path program 12 times [2023-08-30 19:22:42,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:42,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828520701] [2023-08-30 19:22:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:42,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:42,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:42,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828520701] [2023-08-30 19:22:42,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828520701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:42,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776144510] [2023-08-30 19:22:42,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:22:42,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:42,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:42,170 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:42,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 19:22:42,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:22:42,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:42,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:42,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:42,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:42,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776144510] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:42,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:42,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 19:22:42,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657226790] [2023-08-30 19:22:42,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:42,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:22:42,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:42,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:22:42,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:22:42,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:42,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 131 transitions, 1857 flow. Second operand has 12 states, 12 states have (on average 171.16666666666666) internal successors, (2054), 12 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:42,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:42,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:42,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:42,687 INFO L130 PetriNetUnfolder]: 387/752 cut-off events. [2023-08-30 19:22:42,687 INFO L131 PetriNetUnfolder]: For 10139/10139 co-relation queries the response was YES. [2023-08-30 19:22:42,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5345 conditions, 752 events. 387/752 cut-off events. For 10139/10139 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3731 event pairs, 57 based on Foata normal form. 16/764 useless extension candidates. Maximal degree in co-relation 5292. Up to 243 conditions per place. [2023-08-30 19:22:42,693 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 114 selfloop transitions, 71 changer transitions 2/187 dead transitions. [2023-08-30 19:22:42,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 187 transitions, 2623 flow [2023-08-30 19:22:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 19:22:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 19:22:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3145 transitions. [2023-08-30 19:22:42,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408306364617043 [2023-08-30 19:22:42,697 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3145 transitions. [2023-08-30 19:22:42,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3145 transitions. [2023-08-30 19:22:42,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:42,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3145 transitions. [2023-08-30 19:22:42,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 174.72222222222223) internal successors, (3145), 18 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:42,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:42,708 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:42,708 INFO L175 Difference]: Start difference. First operand has 133 places, 131 transitions, 1857 flow. Second operand 18 states and 3145 transitions. [2023-08-30 19:22:42,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 187 transitions, 2623 flow [2023-08-30 19:22:42,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 187 transitions, 2501 flow, removed 48 selfloop flow, removed 4 redundant places. [2023-08-30 19:22:42,731 INFO L231 Difference]: Finished difference. Result has 148 places, 131 transitions, 1976 flow [2023-08-30 19:22:42,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1976, PETRI_PLACES=148, PETRI_TRANSITIONS=131} [2023-08-30 19:22:42,732 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 128 predicate places. [2023-08-30 19:22:42,732 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 131 transitions, 1976 flow [2023-08-30 19:22:42,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.16666666666666) internal successors, (2054), 12 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:42,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:42,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:42,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-30 19:22:42,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:42,938 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:42,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:42,938 INFO L85 PathProgramCache]: Analyzing trace with hash -844138731, now seen corresponding path program 13 times [2023-08-30 19:22:42,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:42,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765576103] [2023-08-30 19:22:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:42,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:42,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:42,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765576103] [2023-08-30 19:22:42,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765576103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:42,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526790461] [2023-08-30 19:22:42,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:22:42,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:42,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:43,009 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:43,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 19:22:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:43,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:43,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:43,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526790461] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:43,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:43,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 19:22:43,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654723319] [2023-08-30 19:22:43,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:43,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:22:43,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:43,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:22:43,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:22:43,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:43,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 131 transitions, 1976 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:43,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:43,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:43,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:43,471 INFO L130 PetriNetUnfolder]: 388/747 cut-off events. [2023-08-30 19:22:43,471 INFO L131 PetriNetUnfolder]: For 10712/10712 co-relation queries the response was YES. [2023-08-30 19:22:43,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5438 conditions, 747 events. 388/747 cut-off events. For 10712/10712 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3679 event pairs, 13 based on Foata normal form. 6/749 useless extension candidates. Maximal degree in co-relation 5382. Up to 203 conditions per place. [2023-08-30 19:22:43,478 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 123 selfloop transitions, 86 changer transitions 2/211 dead transitions. [2023-08-30 19:22:43,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 211 transitions, 3237 flow [2023-08-30 19:22:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 19:22:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 19:22:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3305 transitions. [2023-08-30 19:22:43,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222023505365355 [2023-08-30 19:22:43,481 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3305 transitions. [2023-08-30 19:22:43,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3305 transitions. [2023-08-30 19:22:43,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:43,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3305 transitions. [2023-08-30 19:22:43,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 173.94736842105263) internal successors, (3305), 19 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:43,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:43,511 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:43,511 INFO L175 Difference]: Start difference. First operand has 148 places, 131 transitions, 1976 flow. Second operand 19 states and 3305 transitions. [2023-08-30 19:22:43,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 211 transitions, 3237 flow [2023-08-30 19:22:43,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 211 transitions, 2965 flow, removed 91 selfloop flow, removed 10 redundant places. [2023-08-30 19:22:43,538 INFO L231 Difference]: Finished difference. Result has 157 places, 157 transitions, 2334 flow [2023-08-30 19:22:43,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2334, PETRI_PLACES=157, PETRI_TRANSITIONS=157} [2023-08-30 19:22:43,539 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 137 predicate places. [2023-08-30 19:22:43,539 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 157 transitions, 2334 flow [2023-08-30 19:22:43,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:43,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:43,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:43,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-30 19:22:43,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:43,745 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:43,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash -205590883, now seen corresponding path program 14 times [2023-08-30 19:22:43,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:43,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399924211] [2023-08-30 19:22:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:43,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:43,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:43,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399924211] [2023-08-30 19:22:43,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399924211] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:43,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406665527] [2023-08-30 19:22:43,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:22:43,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:43,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:43,809 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:43,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 19:22:43,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:22:43,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:43,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:43,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:43,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:43,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406665527] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:43,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:43,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 19:22:43,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123217868] [2023-08-30 19:22:43,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:43,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:22:43,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:43,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:22:43,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:22:43,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:43,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 157 transitions, 2334 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:43,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:43,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:43,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:44,335 INFO L130 PetriNetUnfolder]: 564/1111 cut-off events. [2023-08-30 19:22:44,335 INFO L131 PetriNetUnfolder]: For 18104/18104 co-relation queries the response was YES. [2023-08-30 19:22:44,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8133 conditions, 1111 events. 564/1111 cut-off events. For 18104/18104 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6245 event pairs, 45 based on Foata normal form. 18/1121 useless extension candidates. Maximal degree in co-relation 8074. Up to 406 conditions per place. [2023-08-30 19:22:44,344 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 152 selfloop transitions, 117 changer transitions 0/269 dead transitions. [2023-08-30 19:22:44,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 269 transitions, 4223 flow [2023-08-30 19:22:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:22:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:22:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2637 transitions. [2023-08-30 19:22:44,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266990291262136 [2023-08-30 19:22:44,346 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2637 transitions. [2023-08-30 19:22:44,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2637 transitions. [2023-08-30 19:22:44,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:44,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2637 transitions. [2023-08-30 19:22:44,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.8) internal successors, (2637), 15 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:44,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:44,353 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:44,353 INFO L175 Difference]: Start difference. First operand has 157 places, 157 transitions, 2334 flow. Second operand 15 states and 2637 transitions. [2023-08-30 19:22:44,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 269 transitions, 4223 flow [2023-08-30 19:22:44,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 269 transitions, 3910 flow, removed 129 selfloop flow, removed 8 redundant places. [2023-08-30 19:22:44,397 INFO L231 Difference]: Finished difference. Result has 168 places, 203 transitions, 3262 flow [2023-08-30 19:22:44,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3262, PETRI_PLACES=168, PETRI_TRANSITIONS=203} [2023-08-30 19:22:44,398 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2023-08-30 19:22:44,398 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 203 transitions, 3262 flow [2023-08-30 19:22:44,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:44,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:44,399 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:44,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:44,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 19:22:44,604 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:44,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:44,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1054951077, now seen corresponding path program 15 times [2023-08-30 19:22:44,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:44,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112465509] [2023-08-30 19:22:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:44,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:44,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:44,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112465509] [2023-08-30 19:22:44,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112465509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:44,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817531619] [2023-08-30 19:22:44,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:22:44,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:44,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:44,655 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:44,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 19:22:44,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:22:44,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:44,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:44,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:22:44,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817531619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:44,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:44,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 19:22:44,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330195531] [2023-08-30 19:22:44,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:44,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:22:44,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:22:44,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:22:44,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:44,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 203 transitions, 3262 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:44,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:44,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:44,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:45,186 INFO L130 PetriNetUnfolder]: 566/1133 cut-off events. [2023-08-30 19:22:45,186 INFO L131 PetriNetUnfolder]: For 19342/19342 co-relation queries the response was YES. [2023-08-30 19:22:45,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8557 conditions, 1133 events. 566/1133 cut-off events. For 19342/19342 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6498 event pairs, 23 based on Foata normal form. 6/1139 useless extension candidates. Maximal degree in co-relation 8496. Up to 342 conditions per place. [2023-08-30 19:22:45,196 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 148 selfloop transitions, 127 changer transitions 2/277 dead transitions. [2023-08-30 19:22:45,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 277 transitions, 4574 flow [2023-08-30 19:22:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 19:22:45,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 19:22:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3657 transitions. [2023-08-30 19:22:45,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226768377253814 [2023-08-30 19:22:45,200 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3657 transitions. [2023-08-30 19:22:45,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3657 transitions. [2023-08-30 19:22:45,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:45,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3657 transitions. [2023-08-30 19:22:45,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 174.14285714285714) internal successors, (3657), 21 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:45,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:45,208 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:45,208 INFO L175 Difference]: Start difference. First operand has 168 places, 203 transitions, 3262 flow. Second operand 21 states and 3657 transitions. [2023-08-30 19:22:45,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 277 transitions, 4574 flow [2023-08-30 19:22:45,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 277 transitions, 4415 flow, removed 66 selfloop flow, removed 3 redundant places. [2023-08-30 19:22:45,266 INFO L231 Difference]: Finished difference. Result has 188 places, 211 transitions, 3597 flow [2023-08-30 19:22:45,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3597, PETRI_PLACES=188, PETRI_TRANSITIONS=211} [2023-08-30 19:22:45,267 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 168 predicate places. [2023-08-30 19:22:45,267 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 211 transitions, 3597 flow [2023-08-30 19:22:45,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:45,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:45,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:45,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-30 19:22:45,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 19:22:45,473 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:45,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1615313315, now seen corresponding path program 16 times [2023-08-30 19:22:45,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:45,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162631337] [2023-08-30 19:22:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:45,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:45,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:45,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162631337] [2023-08-30 19:22:45,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162631337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827034230] [2023-08-30 19:22:45,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:22:45,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:45,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:45,521 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:45,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 19:22:45,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:22:45,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:45,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:45,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:45,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:45,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827034230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:45,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:45,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 19:22:45,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812465727] [2023-08-30 19:22:45,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:45,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:22:45,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:22:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:22:45,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:45,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 211 transitions, 3597 flow. Second operand has 15 states, 15 states have (on average 170.73333333333332) internal successors, (2561), 15 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:45,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:45,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:45,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:46,098 INFO L130 PetriNetUnfolder]: 629/1260 cut-off events. [2023-08-30 19:22:46,099 INFO L131 PetriNetUnfolder]: For 23382/23382 co-relation queries the response was YES. [2023-08-30 19:22:46,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9976 conditions, 1260 events. 629/1260 cut-off events. For 23382/23382 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7379 event pairs, 27 based on Foata normal form. 6/1266 useless extension candidates. Maximal degree in co-relation 9912. Up to 359 conditions per place. [2023-08-30 19:22:46,107 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 147 selfloop transitions, 141 changer transitions 4/292 dead transitions. [2023-08-30 19:22:46,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 292 transitions, 5271 flow [2023-08-30 19:22:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 19:22:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 19:22:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3478 transitions. [2023-08-30 19:22:46,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220873786407767 [2023-08-30 19:22:46,116 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3478 transitions. [2023-08-30 19:22:46,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3478 transitions. [2023-08-30 19:22:46,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:46,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3478 transitions. [2023-08-30 19:22:46,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 173.9) internal successors, (3478), 20 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:46,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:46,128 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:46,128 INFO L175 Difference]: Start difference. First operand has 188 places, 211 transitions, 3597 flow. Second operand 20 states and 3478 transitions. [2023-08-30 19:22:46,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 292 transitions, 5271 flow [2023-08-30 19:22:46,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 292 transitions, 4963 flow, removed 126 selfloop flow, removed 7 redundant places. [2023-08-30 19:22:46,195 INFO L231 Difference]: Finished difference. Result has 205 places, 234 transitions, 4307 flow [2023-08-30 19:22:46,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4307, PETRI_PLACES=205, PETRI_TRANSITIONS=234} [2023-08-30 19:22:46,196 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 185 predicate places. [2023-08-30 19:22:46,196 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 234 transitions, 4307 flow [2023-08-30 19:22:46,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.73333333333332) internal successors, (2561), 15 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:46,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:46,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:46,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:46,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 19:22:46,402 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:46,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:46,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1858772581, now seen corresponding path program 17 times [2023-08-30 19:22:46,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:46,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100678078] [2023-08-30 19:22:46,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:46,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:46,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:46,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100678078] [2023-08-30 19:22:46,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100678078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:46,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579613157] [2023-08-30 19:22:46,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:22:46,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:46,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:46,451 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:46,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 19:22:46,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:22:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:46,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:46,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:46,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:46,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579613157] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:46,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:46,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 19:22:46,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617387237] [2023-08-30 19:22:46,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:46,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:22:46,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:22:46,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:22:46,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:46,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 234 transitions, 4307 flow. Second operand has 15 states, 15 states have (on average 171.06666666666666) internal successors, (2566), 15 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:46,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:46,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:46,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:47,060 INFO L130 PetriNetUnfolder]: 658/1339 cut-off events. [2023-08-30 19:22:47,060 INFO L131 PetriNetUnfolder]: For 29848/29848 co-relation queries the response was YES. [2023-08-30 19:22:47,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11064 conditions, 1339 events. 658/1339 cut-off events. For 29848/29848 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8174 event pairs, 27 based on Foata normal form. 24/1363 useless extension candidates. Maximal degree in co-relation 10994. Up to 595 conditions per place. [2023-08-30 19:22:47,070 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 212 selfloop transitions, 105 changer transitions 7/324 dead transitions. [2023-08-30 19:22:47,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 324 transitions, 6036 flow [2023-08-30 19:22:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 19:22:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 19:22:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4009 transitions. [2023-08-30 19:22:47,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230688054031237 [2023-08-30 19:22:47,074 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4009 transitions. [2023-08-30 19:22:47,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4009 transitions. [2023-08-30 19:22:47,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:47,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4009 transitions. [2023-08-30 19:22:47,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 174.30434782608697) internal successors, (4009), 23 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:47,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:47,083 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:47,083 INFO L175 Difference]: Start difference. First operand has 205 places, 234 transitions, 4307 flow. Second operand 23 states and 4009 transitions. [2023-08-30 19:22:47,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 324 transitions, 6036 flow [2023-08-30 19:22:47,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 324 transitions, 5854 flow, removed 53 selfloop flow, removed 7 redundant places. [2023-08-30 19:22:47,174 INFO L231 Difference]: Finished difference. Result has 226 places, 251 transitions, 4920 flow [2023-08-30 19:22:47,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=4104, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4920, PETRI_PLACES=226, PETRI_TRANSITIONS=251} [2023-08-30 19:22:47,175 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-08-30 19:22:47,175 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 251 transitions, 4920 flow [2023-08-30 19:22:47,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 171.06666666666666) internal successors, (2566), 15 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:47,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:47,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:47,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:47,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:47,380 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:47,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2139611511, now seen corresponding path program 18 times [2023-08-30 19:22:47,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:47,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310651476] [2023-08-30 19:22:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:47,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:47,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:47,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310651476] [2023-08-30 19:22:47,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310651476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:47,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170026155] [2023-08-30 19:22:47,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:22:47,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:47,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:47,439 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:47,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 19:22:47,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:22:47,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:47,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:47,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:47,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:47,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170026155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:47,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:47,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 19:22:47,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716215427] [2023-08-30 19:22:47,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:47,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:22:47,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:47,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:22:47,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:22:47,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:47,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 251 transitions, 4920 flow. Second operand has 15 states, 15 states have (on average 170.73333333333332) internal successors, (2561), 15 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:47,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:47,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:47,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:48,235 INFO L130 PetriNetUnfolder]: 776/1587 cut-off events. [2023-08-30 19:22:48,235 INFO L131 PetriNetUnfolder]: For 49092/49092 co-relation queries the response was YES. [2023-08-30 19:22:48,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14335 conditions, 1587 events. 776/1587 cut-off events. For 49092/49092 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10130 event pairs, 116 based on Foata normal form. 16/1603 useless extension candidates. Maximal degree in co-relation 14257. Up to 472 conditions per place. [2023-08-30 19:22:48,247 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 227 selfloop transitions, 143 changer transitions 4/374 dead transitions. [2023-08-30 19:22:48,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 374 transitions, 7969 flow [2023-08-30 19:22:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 19:22:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 19:22:48,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4005 transitions. [2023-08-30 19:22:48,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226466863655551 [2023-08-30 19:22:48,256 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4005 transitions. [2023-08-30 19:22:48,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4005 transitions. [2023-08-30 19:22:48,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:48,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4005 transitions. [2023-08-30 19:22:48,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 174.1304347826087) internal successors, (4005), 23 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:48,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:48,266 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:48,266 INFO L175 Difference]: Start difference. First operand has 226 places, 251 transitions, 4920 flow. Second operand 23 states and 4005 transitions. [2023-08-30 19:22:48,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 374 transitions, 7969 flow [2023-08-30 19:22:48,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 374 transitions, 6986 flow, removed 398 selfloop flow, removed 11 redundant places. [2023-08-30 19:22:48,424 INFO L231 Difference]: Finished difference. Result has 242 places, 305 transitions, 6227 flow [2023-08-30 19:22:48,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=4389, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6227, PETRI_PLACES=242, PETRI_TRANSITIONS=305} [2023-08-30 19:22:48,425 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-08-30 19:22:48,426 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 305 transitions, 6227 flow [2023-08-30 19:22:48,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.73333333333332) internal successors, (2561), 15 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:48,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:48,426 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:48,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-30 19:22:48,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 19:22:48,631 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:48,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash 988708695, now seen corresponding path program 19 times [2023-08-30 19:22:48,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:48,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852654999] [2023-08-30 19:22:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:48,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:48,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852654999] [2023-08-30 19:22:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852654999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585686660] [2023-08-30 19:22:48,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:22:48,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:48,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:48,698 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:48,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 19:22:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:48,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:48,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585686660] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:48,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:48,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 19:22:48,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818650674] [2023-08-30 19:22:48,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:48,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:22:48,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:48,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:22:48,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:22:48,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:48,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 305 transitions, 6227 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:48,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:48,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:48,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:49,378 INFO L130 PetriNetUnfolder]: 862/1779 cut-off events. [2023-08-30 19:22:49,378 INFO L131 PetriNetUnfolder]: For 62137/62137 co-relation queries the response was YES. [2023-08-30 19:22:49,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15867 conditions, 1779 events. 862/1779 cut-off events. For 62137/62137 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11790 event pairs, 195 based on Foata normal form. 40/1819 useless extension candidates. Maximal degree in co-relation 15783. Up to 1019 conditions per place. [2023-08-30 19:22:49,394 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 263 selfloop transitions, 121 changer transitions 0/384 dead transitions. [2023-08-30 19:22:49,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 384 transitions, 8294 flow [2023-08-30 19:22:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:22:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:22:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2286 transitions. [2023-08-30 19:22:49,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268110530246453 [2023-08-30 19:22:49,397 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2286 transitions. [2023-08-30 19:22:49,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2286 transitions. [2023-08-30 19:22:49,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:49,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2286 transitions. [2023-08-30 19:22:49,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 175.84615384615384) internal successors, (2286), 13 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:49,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:49,402 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:49,402 INFO L175 Difference]: Start difference. First operand has 242 places, 305 transitions, 6227 flow. Second operand 13 states and 2286 transitions. [2023-08-30 19:22:49,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 384 transitions, 8294 flow [2023-08-30 19:22:49,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 384 transitions, 7514 flow, removed 368 selfloop flow, removed 8 redundant places. [2023-08-30 19:22:49,639 INFO L231 Difference]: Finished difference. Result has 248 places, 321 transitions, 6310 flow [2023-08-30 19:22:49,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6310, PETRI_PLACES=248, PETRI_TRANSITIONS=321} [2023-08-30 19:22:49,640 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 228 predicate places. [2023-08-30 19:22:49,640 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 321 transitions, 6310 flow [2023-08-30 19:22:49,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:49,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:49,641 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:49,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:49,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:49,849 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:49,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:49,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1226313027, now seen corresponding path program 20 times [2023-08-30 19:22:49,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:49,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258208833] [2023-08-30 19:22:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:49,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:49,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:49,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258208833] [2023-08-30 19:22:49,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258208833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:49,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082574440] [2023-08-30 19:22:49,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:22:49,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:49,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:49,966 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:49,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 19:22:50,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:22:50,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:50,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:50,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:50,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:50,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082574440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:50,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:50,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 19:22:50,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27431006] [2023-08-30 19:22:50,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:50,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:22:50,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:22:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:22:50,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:50,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 321 transitions, 6310 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:50,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:50,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:50,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:50,729 INFO L130 PetriNetUnfolder]: 928/1905 cut-off events. [2023-08-30 19:22:50,729 INFO L131 PetriNetUnfolder]: For 55076/55076 co-relation queries the response was YES. [2023-08-30 19:22:50,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16385 conditions, 1905 events. 928/1905 cut-off events. For 55076/55076 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12743 event pairs, 156 based on Foata normal form. 6/1911 useless extension candidates. Maximal degree in co-relation 16297. Up to 640 conditions per place. [2023-08-30 19:22:50,746 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 245 selfloop transitions, 144 changer transitions 2/391 dead transitions. [2023-08-30 19:22:50,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 391 transitions, 7993 flow [2023-08-30 19:22:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:22:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:22:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2960 transitions. [2023-08-30 19:22:50,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422615648201028 [2023-08-30 19:22:50,748 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2960 transitions. [2023-08-30 19:22:50,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2960 transitions. [2023-08-30 19:22:50,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:50,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2960 transitions. [2023-08-30 19:22:50,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 174.11764705882354) internal successors, (2960), 17 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:50,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 412.0) internal successors, (7416), 18 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:50,756 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 412.0) internal successors, (7416), 18 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:50,756 INFO L175 Difference]: Start difference. First operand has 248 places, 321 transitions, 6310 flow. Second operand 17 states and 2960 transitions. [2023-08-30 19:22:50,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 391 transitions, 7993 flow [2023-08-30 19:22:50,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 391 transitions, 7571 flow, removed 179 selfloop flow, removed 6 redundant places. [2023-08-30 19:22:50,988 INFO L231 Difference]: Finished difference. Result has 263 places, 341 transitions, 6828 flow [2023-08-30 19:22:50,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=5926, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6828, PETRI_PLACES=263, PETRI_TRANSITIONS=341} [2023-08-30 19:22:50,988 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 243 predicate places. [2023-08-30 19:22:50,989 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 341 transitions, 6828 flow [2023-08-30 19:22:50,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:50,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:50,989 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:50,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:51,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 19:22:51,195 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:51,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:51,195 INFO L85 PathProgramCache]: Analyzing trace with hash -915768439, now seen corresponding path program 21 times [2023-08-30 19:22:51,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:51,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372441003] [2023-08-30 19:22:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:51,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:51,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:51,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372441003] [2023-08-30 19:22:51,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372441003] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:51,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965310245] [2023-08-30 19:22:51,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:22:51,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:51,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:51,262 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:51,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 19:22:51,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:22:51,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:51,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:51,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:51,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:51,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965310245] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:51,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:51,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 19:22:51,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203850384] [2023-08-30 19:22:51,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:51,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:22:51,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:22:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:22:51,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:51,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 341 transitions, 6828 flow. Second operand has 11 states, 11 states have (on average 171.0909090909091) internal successors, (1882), 11 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:51,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:51,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:51,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:51,964 INFO L130 PetriNetUnfolder]: 927/1906 cut-off events. [2023-08-30 19:22:51,965 INFO L131 PetriNetUnfolder]: For 54564/54564 co-relation queries the response was YES. [2023-08-30 19:22:51,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16583 conditions, 1906 events. 927/1906 cut-off events. For 54564/54564 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12775 event pairs, 173 based on Foata normal form. 2/1908 useless extension candidates. Maximal degree in co-relation 16491. Up to 1010 conditions per place. [2023-08-30 19:22:51,983 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 234 selfloop transitions, 132 changer transitions 5/371 dead transitions. [2023-08-30 19:22:51,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 371 transitions, 7954 flow [2023-08-30 19:22:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:22:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:22:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1912 transitions. [2023-08-30 19:22:51,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42188879082082964 [2023-08-30 19:22:51,985 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1912 transitions. [2023-08-30 19:22:51,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1912 transitions. [2023-08-30 19:22:51,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:51,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1912 transitions. [2023-08-30 19:22:51,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 173.8181818181818) internal successors, (1912), 11 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:51,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:51,990 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:51,990 INFO L175 Difference]: Start difference. First operand has 263 places, 341 transitions, 6828 flow. Second operand 11 states and 1912 transitions. [2023-08-30 19:22:51,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 371 transitions, 7954 flow [2023-08-30 19:22:52,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 371 transitions, 7896 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-30 19:22:52,248 INFO L231 Difference]: Finished difference. Result has 268 places, 341 transitions, 7082 flow [2023-08-30 19:22:52,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=6770, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7082, PETRI_PLACES=268, PETRI_TRANSITIONS=341} [2023-08-30 19:22:52,248 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2023-08-30 19:22:52,249 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 341 transitions, 7082 flow [2023-08-30 19:22:52,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.0909090909091) internal successors, (1882), 11 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:52,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:52,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:52,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:52,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:52,453 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:52,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:52,453 INFO L85 PathProgramCache]: Analyzing trace with hash 222682459, now seen corresponding path program 22 times [2023-08-30 19:22:52,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:52,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820837858] [2023-08-30 19:22:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:52,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:52,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:52,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820837858] [2023-08-30 19:22:52,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820837858] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:52,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67409969] [2023-08-30 19:22:52,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:22:52,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:52,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:52,499 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:52,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 19:22:52,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:22:52,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:52,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:52,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:52,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:52,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67409969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:52,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:52,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 19:22:52,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334043202] [2023-08-30 19:22:52,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:52,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:22:52,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:22:52,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:22:52,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:52,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 341 transitions, 7082 flow. Second operand has 11 states, 11 states have (on average 171.0909090909091) internal successors, (1882), 11 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:52,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:52,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:52,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:53,145 INFO L130 PetriNetUnfolder]: 943/1930 cut-off events. [2023-08-30 19:22:53,146 INFO L131 PetriNetUnfolder]: For 57665/57665 co-relation queries the response was YES. [2023-08-30 19:22:53,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17176 conditions, 1930 events. 943/1930 cut-off events. For 57665/57665 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12878 event pairs, 58 based on Foata normal form. 10/1940 useless extension candidates. Maximal degree in co-relation 17081. Up to 1497 conditions per place. [2023-08-30 19:22:53,160 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 285 selfloop transitions, 88 changer transitions 0/373 dead transitions. [2023-08-30 19:22:53,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 373 transitions, 8278 flow [2023-08-30 19:22:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:22:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:22:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1230 transitions. [2023-08-30 19:22:53,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264909847434119 [2023-08-30 19:22:53,162 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1230 transitions. [2023-08-30 19:22:53,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1230 transitions. [2023-08-30 19:22:53,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:53,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1230 transitions. [2023-08-30 19:22:53,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 175.71428571428572) internal successors, (1230), 7 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:53,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:53,165 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:53,165 INFO L175 Difference]: Start difference. First operand has 268 places, 341 transitions, 7082 flow. Second operand 7 states and 1230 transitions. [2023-08-30 19:22:53,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 373 transitions, 8278 flow [2023-08-30 19:22:53,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 373 transitions, 8215 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-30 19:22:53,395 INFO L231 Difference]: Finished difference. Result has 270 places, 348 transitions, 7341 flow [2023-08-30 19:22:53,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=7019, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7341, PETRI_PLACES=270, PETRI_TRANSITIONS=348} [2023-08-30 19:22:53,396 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2023-08-30 19:22:53,396 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 348 transitions, 7341 flow [2023-08-30 19:22:53,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.0909090909091) internal successors, (1882), 11 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:53,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:53,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:53,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:53,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:53,601 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:53,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:53,602 INFO L85 PathProgramCache]: Analyzing trace with hash -127101819, now seen corresponding path program 23 times [2023-08-30 19:22:53,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:53,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636209280] [2023-08-30 19:22:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:53,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:53,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:53,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636209280] [2023-08-30 19:22:53,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636209280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:53,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356148811] [2023-08-30 19:22:53,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:22:53,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:53,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:53,651 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:53,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 19:22:53,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:22:53,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:53,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:53,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:53,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:53,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356148811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:53,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:53,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 19:22:53,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700592526] [2023-08-30 19:22:53,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:53,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:22:53,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:22:53,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:22:53,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:53,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 348 transitions, 7341 flow. Second operand has 13 states, 13 states have (on average 171.07692307692307) internal successors, (2224), 13 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:53,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:53,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:53,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:54,480 INFO L130 PetriNetUnfolder]: 978/2007 cut-off events. [2023-08-30 19:22:54,481 INFO L131 PetriNetUnfolder]: For 61128/61128 co-relation queries the response was YES. [2023-08-30 19:22:54,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18001 conditions, 2007 events. 978/2007 cut-off events. For 61128/61128 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 13589 event pairs, 34 based on Foata normal form. 16/2023 useless extension candidates. Maximal degree in co-relation 17905. Up to 945 conditions per place. [2023-08-30 19:22:54,497 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 289 selfloop transitions, 144 changer transitions 1/434 dead transitions. [2023-08-30 19:22:54,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 434 transitions, 9253 flow [2023-08-30 19:22:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 19:22:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 19:22:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3829 transitions. [2023-08-30 19:22:54,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224404236540159 [2023-08-30 19:22:54,500 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3829 transitions. [2023-08-30 19:22:54,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3829 transitions. [2023-08-30 19:22:54,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:54,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3829 transitions. [2023-08-30 19:22:54,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 174.04545454545453) internal successors, (3829), 22 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:54,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:54,508 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:54,509 INFO L175 Difference]: Start difference. First operand has 270 places, 348 transitions, 7341 flow. Second operand 22 states and 3829 transitions. [2023-08-30 19:22:54,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 434 transitions, 9253 flow [2023-08-30 19:22:54,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 434 transitions, 9061 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-08-30 19:22:54,775 INFO L231 Difference]: Finished difference. Result has 296 places, 372 transitions, 8028 flow [2023-08-30 19:22:54,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8028, PETRI_PLACES=296, PETRI_TRANSITIONS=372} [2023-08-30 19:22:54,776 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 276 predicate places. [2023-08-30 19:22:54,776 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 372 transitions, 8028 flow [2023-08-30 19:22:54,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.07692307692307) internal successors, (2224), 13 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:54,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:54,776 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:54,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:54,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:54,981 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:54,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1017412653, now seen corresponding path program 24 times [2023-08-30 19:22:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:54,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066320416] [2023-08-30 19:22:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:54,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:55,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:55,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066320416] [2023-08-30 19:22:55,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066320416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:55,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996962054] [2023-08-30 19:22:55,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:22:55,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:55,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:55,077 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:55,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 19:22:55,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:22:55,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:55,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:22:55,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996962054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:55,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:55,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 19:22:55,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400819983] [2023-08-30 19:22:55,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:55,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:22:55,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:55,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:22:55,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:22:55,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:55,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 372 transitions, 8028 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:55,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:55,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:55,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:55,811 INFO L130 PetriNetUnfolder]: 981/2002 cut-off events. [2023-08-30 19:22:55,811 INFO L131 PetriNetUnfolder]: For 66776/66776 co-relation queries the response was YES. [2023-08-30 19:22:55,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18753 conditions, 2002 events. 981/2002 cut-off events. For 66776/66776 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 13431 event pairs, 80 based on Foata normal form. 22/2024 useless extension candidates. Maximal degree in co-relation 18649. Up to 1634 conditions per place. [2023-08-30 19:22:55,828 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 333 selfloop transitions, 82 changer transitions 0/415 dead transitions. [2023-08-30 19:22:55,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 415 transitions, 9353 flow [2023-08-30 19:22:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:22:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:22:55,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2618 transitions. [2023-08-30 19:22:55,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236245954692557 [2023-08-30 19:22:55,830 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2618 transitions. [2023-08-30 19:22:55,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2618 transitions. [2023-08-30 19:22:55,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:55,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2618 transitions. [2023-08-30 19:22:55,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 174.53333333333333) internal successors, (2618), 15 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:55,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:55,835 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:55,835 INFO L175 Difference]: Start difference. First operand has 296 places, 372 transitions, 8028 flow. Second operand 15 states and 2618 transitions. [2023-08-30 19:22:55,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 415 transitions, 9353 flow [2023-08-30 19:22:56,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 415 transitions, 9204 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-08-30 19:22:56,170 INFO L231 Difference]: Finished difference. Result has 305 places, 378 transitions, 8217 flow [2023-08-30 19:22:56,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=7695, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8217, PETRI_PLACES=305, PETRI_TRANSITIONS=378} [2023-08-30 19:22:56,170 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 285 predicate places. [2023-08-30 19:22:56,171 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 378 transitions, 8217 flow [2023-08-30 19:22:56,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:56,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:56,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:56,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-30 19:22:56,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-30 19:22:56,373 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:56,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:56,373 INFO L85 PathProgramCache]: Analyzing trace with hash -591752163, now seen corresponding path program 25 times [2023-08-30 19:22:56,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:56,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836590445] [2023-08-30 19:22:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:56,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:56,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:56,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836590445] [2023-08-30 19:22:56,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836590445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:56,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656649506] [2023-08-30 19:22:56,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:22:56,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:56,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:56,439 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:56,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 19:22:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:56,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:56,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:56,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656649506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:56,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:56,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 19:22:56,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007652648] [2023-08-30 19:22:56,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:56,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:22:56,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:56,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:22:56,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:22:56,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:56,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 378 transitions, 8217 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:56,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:56,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:56,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:57,312 INFO L130 PetriNetUnfolder]: 1097/2244 cut-off events. [2023-08-30 19:22:57,312 INFO L131 PetriNetUnfolder]: For 81764/81764 co-relation queries the response was YES. [2023-08-30 19:22:57,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21637 conditions, 2244 events. 1097/2244 cut-off events. For 81764/81764 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 15527 event pairs, 74 based on Foata normal form. 16/2260 useless extension candidates. Maximal degree in co-relation 21529. Up to 1322 conditions per place. [2023-08-30 19:22:57,331 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 331 selfloop transitions, 148 changer transitions 0/479 dead transitions. [2023-08-30 19:22:57,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 479 transitions, 11097 flow [2023-08-30 19:22:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:22:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:22:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2629 transitions. [2023-08-30 19:22:57,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254045307443366 [2023-08-30 19:22:57,334 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2629 transitions. [2023-08-30 19:22:57,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2629 transitions. [2023-08-30 19:22:57,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:57,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2629 transitions. [2023-08-30 19:22:57,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.26666666666668) internal successors, (2629), 15 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:57,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:57,339 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:57,339 INFO L175 Difference]: Start difference. First operand has 305 places, 378 transitions, 8217 flow. Second operand 15 states and 2629 transitions. [2023-08-30 19:22:57,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 479 transitions, 11097 flow [2023-08-30 19:22:57,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 479 transitions, 10869 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-08-30 19:22:57,672 INFO L231 Difference]: Finished difference. Result has 315 places, 411 transitions, 9359 flow [2023-08-30 19:22:57,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=8011, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9359, PETRI_PLACES=315, PETRI_TRANSITIONS=411} [2023-08-30 19:22:57,673 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 295 predicate places. [2023-08-30 19:22:57,673 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 411 transitions, 9359 flow [2023-08-30 19:22:57,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:57,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:57,674 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:57,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:57,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 19:22:57,879 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:57,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:57,879 INFO L85 PathProgramCache]: Analyzing trace with hash 179362069, now seen corresponding path program 26 times [2023-08-30 19:22:57,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:57,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751968199] [2023-08-30 19:22:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:57,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:57,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:57,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751968199] [2023-08-30 19:22:57,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751968199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:57,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373747417] [2023-08-30 19:22:57,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:22:57,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:57,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:57,928 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:57,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 19:22:58,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:22:58,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:58,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:58,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:58,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373747417] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:58,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:58,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 19:22:58,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130242156] [2023-08-30 19:22:58,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:58,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:22:58,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:58,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:22:58,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:22:58,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:58,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 411 transitions, 9359 flow. Second operand has 13 states, 13 states have (on average 171.0) internal successors, (2223), 13 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:58,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:58,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:58,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:58,844 INFO L130 PetriNetUnfolder]: 1134/2297 cut-off events. [2023-08-30 19:22:58,844 INFO L131 PetriNetUnfolder]: For 85699/85699 co-relation queries the response was YES. [2023-08-30 19:22:58,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22998 conditions, 2297 events. 1134/2297 cut-off events. For 85699/85699 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15770 event pairs, 96 based on Foata normal form. 12/2309 useless extension candidates. Maximal degree in co-relation 22887. Up to 2035 conditions per place. [2023-08-30 19:22:58,862 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 375 selfloop transitions, 76 changer transitions 0/451 dead transitions. [2023-08-30 19:22:58,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 451 transitions, 11023 flow [2023-08-30 19:22:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:22:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:22:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1917 transitions. [2023-08-30 19:22:58,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229920564872021 [2023-08-30 19:22:58,864 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1917 transitions. [2023-08-30 19:22:58,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1917 transitions. [2023-08-30 19:22:58,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:58,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1917 transitions. [2023-08-30 19:22:58,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 174.27272727272728) internal successors, (1917), 11 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:58,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:58,867 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:58,868 INFO L175 Difference]: Start difference. First operand has 315 places, 411 transitions, 9359 flow. Second operand 11 states and 1917 transitions. [2023-08-30 19:22:58,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 451 transitions, 11023 flow [2023-08-30 19:22:59,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 451 transitions, 10660 flow, removed 114 selfloop flow, removed 13 redundant places. [2023-08-30 19:22:59,254 INFO L231 Difference]: Finished difference. Result has 312 places, 428 transitions, 9632 flow [2023-08-30 19:22:59,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=8925, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9632, PETRI_PLACES=312, PETRI_TRANSITIONS=428} [2023-08-30 19:22:59,255 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-08-30 19:22:59,255 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 428 transitions, 9632 flow [2023-08-30 19:22:59,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.0) internal successors, (2223), 13 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:59,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:59,255 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:59,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:59,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:59,460 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:22:59,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:59,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1678716689, now seen corresponding path program 27 times [2023-08-30 19:22:59,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:59,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814466911] [2023-08-30 19:22:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:59,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:59,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:59,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814466911] [2023-08-30 19:22:59,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814466911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:59,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133374666] [2023-08-30 19:22:59,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:22:59,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:59,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:59,505 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:59,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 19:22:59,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:22:59,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:59,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:22:59,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:59,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:59,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133374666] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:59,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:59,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 19:22:59,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482050513] [2023-08-30 19:22:59,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:59,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:22:59,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:59,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:22:59,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:22:59,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:22:59,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 428 transitions, 9632 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:59,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:59,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:22:59,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:00,498 INFO L130 PetriNetUnfolder]: 1192/2425 cut-off events. [2023-08-30 19:23:00,498 INFO L131 PetriNetUnfolder]: For 90262/90262 co-relation queries the response was YES. [2023-08-30 19:23:00,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24067 conditions, 2425 events. 1192/2425 cut-off events. For 90262/90262 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 16940 event pairs, 94 based on Foata normal form. 12/2437 useless extension candidates. Maximal degree in co-relation 23957. Up to 1795 conditions per place. [2023-08-30 19:23:00,523 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 358 selfloop transitions, 135 changer transitions 0/493 dead transitions. [2023-08-30 19:23:00,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 493 transitions, 11552 flow [2023-08-30 19:23:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:23:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:23:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2450 transitions. [2023-08-30 19:23:00,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42475728155339804 [2023-08-30 19:23:00,526 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2450 transitions. [2023-08-30 19:23:00,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2450 transitions. [2023-08-30 19:23:00,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:00,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2450 transitions. [2023-08-30 19:23:00,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 175.0) internal successors, (2450), 14 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:00,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:00,530 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:00,531 INFO L175 Difference]: Start difference. First operand has 312 places, 428 transitions, 9632 flow. Second operand 14 states and 2450 transitions. [2023-08-30 19:23:00,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 493 transitions, 11552 flow [2023-08-30 19:23:00,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 493 transitions, 11350 flow, removed 46 selfloop flow, removed 6 redundant places. [2023-08-30 19:23:00,949 INFO L231 Difference]: Finished difference. Result has 321 places, 444 transitions, 10178 flow [2023-08-30 19:23:00,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=9370, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10178, PETRI_PLACES=321, PETRI_TRANSITIONS=444} [2023-08-30 19:23:00,949 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 301 predicate places. [2023-08-30 19:23:00,949 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 444 transitions, 10178 flow [2023-08-30 19:23:00,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:00,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:00,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:00,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:01,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 19:23:01,155 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:01,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:01,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1591495955, now seen corresponding path program 28 times [2023-08-30 19:23:01,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:01,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125174121] [2023-08-30 19:23:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:01,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:01,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:01,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125174121] [2023-08-30 19:23:01,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125174121] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:01,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72736874] [2023-08-30 19:23:01,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:23:01,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:01,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:01,200 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:01,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 19:23:01,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:23:01,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:23:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:01,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:01,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72736874] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:01,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:01,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 19:23:01,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134531372] [2023-08-30 19:23:01,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:01,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:23:01,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:01,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:23:01,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:23:01,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:23:01,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 444 transitions, 10178 flow. Second operand has 12 states, 12 states have (on average 171.16666666666666) internal successors, (2054), 12 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:01,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:01,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:23:01,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:02,102 INFO L130 PetriNetUnfolder]: 1174/2377 cut-off events. [2023-08-30 19:23:02,102 INFO L131 PetriNetUnfolder]: For 90642/90642 co-relation queries the response was YES. [2023-08-30 19:23:02,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24034 conditions, 2377 events. 1174/2377 cut-off events. For 90642/90642 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 16482 event pairs, 40 based on Foata normal form. 12/2389 useless extension candidates. Maximal degree in co-relation 23923. Up to 1021 conditions per place. [2023-08-30 19:23:02,124 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 295 selfloop transitions, 196 changer transitions 4/495 dead transitions. [2023-08-30 19:23:02,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 495 transitions, 11925 flow [2023-08-30 19:23:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 19:23:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 19:23:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3297 transitions. [2023-08-30 19:23:02,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211803781297905 [2023-08-30 19:23:02,127 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3297 transitions. [2023-08-30 19:23:02,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3297 transitions. [2023-08-30 19:23:02,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:02,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3297 transitions. [2023-08-30 19:23:02,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 173.52631578947367) internal successors, (3297), 19 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:02,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:02,133 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:02,133 INFO L175 Difference]: Start difference. First operand has 321 places, 444 transitions, 10178 flow. Second operand 19 states and 3297 transitions. [2023-08-30 19:23:02,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 495 transitions, 11925 flow [2023-08-30 19:23:02,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 495 transitions, 11751 flow, removed 20 selfloop flow, removed 9 redundant places. [2023-08-30 19:23:02,553 INFO L231 Difference]: Finished difference. Result has 330 places, 444 transitions, 10466 flow [2023-08-30 19:23:02,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=9899, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10466, PETRI_PLACES=330, PETRI_TRANSITIONS=444} [2023-08-30 19:23:02,554 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 310 predicate places. [2023-08-30 19:23:02,554 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 444 transitions, 10466 flow [2023-08-30 19:23:02,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.16666666666666) internal successors, (2054), 12 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:02,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:02,554 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:02,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:02,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 19:23:02,759 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:02,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:02,760 INFO L85 PathProgramCache]: Analyzing trace with hash 139348501, now seen corresponding path program 29 times [2023-08-30 19:23:02,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:02,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050558685] [2023-08-30 19:23:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:02,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:02,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:02,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050558685] [2023-08-30 19:23:02,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050558685] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:02,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106877974] [2023-08-30 19:23:02,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:23:02,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:02,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:02,803 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:02,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 19:23:02,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:23:02,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:02,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:23:02,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:02,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:02,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106877974] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:02,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:02,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 19:23:02,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966679551] [2023-08-30 19:23:02,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:02,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:23:02,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:02,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:23:02,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:23:02,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:23:02,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 444 transitions, 10466 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:02,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:02,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:23:02,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:03,674 INFO L130 PetriNetUnfolder]: 1165/2364 cut-off events. [2023-08-30 19:23:03,675 INFO L131 PetriNetUnfolder]: For 93176/93176 co-relation queries the response was YES. [2023-08-30 19:23:03,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24601 conditions, 2364 events. 1165/2364 cut-off events. For 93176/93176 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 16451 event pairs, 168 based on Foata normal form. 8/2372 useless extension candidates. Maximal degree in co-relation 24489. Up to 704 conditions per place. [2023-08-30 19:23:03,699 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 309 selfloop transitions, 198 changer transitions 2/509 dead transitions. [2023-08-30 19:23:03,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 509 transitions, 12497 flow [2023-08-30 19:23:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 19:23:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 19:23:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3135 transitions. [2023-08-30 19:23:03,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227346278317152 [2023-08-30 19:23:03,702 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3135 transitions. [2023-08-30 19:23:03,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3135 transitions. [2023-08-30 19:23:03,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:03,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3135 transitions. [2023-08-30 19:23:03,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 174.16666666666666) internal successors, (3135), 18 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:03,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:03,708 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:03,708 INFO L175 Difference]: Start difference. First operand has 330 places, 444 transitions, 10466 flow. Second operand 18 states and 3135 transitions. [2023-08-30 19:23:03,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 509 transitions, 12497 flow [2023-08-30 19:23:04,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 509 transitions, 12320 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-08-30 19:23:04,209 INFO L231 Difference]: Finished difference. Result has 334 places, 449 transitions, 10940 flow [2023-08-30 19:23:04,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=10168, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10940, PETRI_PLACES=334, PETRI_TRANSITIONS=449} [2023-08-30 19:23:04,209 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 314 predicate places. [2023-08-30 19:23:04,209 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 449 transitions, 10940 flow [2023-08-30 19:23:04,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:04,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:04,210 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:04,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:04,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 19:23:04,415 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:04,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:04,415 INFO L85 PathProgramCache]: Analyzing trace with hash -421013737, now seen corresponding path program 30 times [2023-08-30 19:23:04,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:04,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405892848] [2023-08-30 19:23:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:04,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:04,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:04,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405892848] [2023-08-30 19:23:04,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405892848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:04,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535054947] [2023-08-30 19:23:04,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:23:04,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:04,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:04,459 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:04,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 19:23:04,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:23:04,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:04,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:23:04,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:04,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:04,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535054947] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:04,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:04,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 19:23:04,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855801211] [2023-08-30 19:23:04,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:04,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:23:04,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:04,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:23:04,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:23:04,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:23:04,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 449 transitions, 10940 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:04,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:04,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:23:04,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:05,366 INFO L130 PetriNetUnfolder]: 1160/2349 cut-off events. [2023-08-30 19:23:05,366 INFO L131 PetriNetUnfolder]: For 95384/95384 co-relation queries the response was YES. [2023-08-30 19:23:05,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25048 conditions, 2349 events. 1160/2349 cut-off events. For 95384/95384 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 16327 event pairs, 214 based on Foata normal form. 2/2351 useless extension candidates. Maximal degree in co-relation 24935. Up to 900 conditions per place. [2023-08-30 19:23:05,386 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 320 selfloop transitions, 163 changer transitions 4/487 dead transitions. [2023-08-30 19:23:05,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 487 transitions, 12329 flow [2023-08-30 19:23:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 19:23:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 19:23:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2777 transitions. [2023-08-30 19:23:05,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212682038834951 [2023-08-30 19:23:05,389 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2777 transitions. [2023-08-30 19:23:05,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2777 transitions. [2023-08-30 19:23:05,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:05,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2777 transitions. [2023-08-30 19:23:05,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 173.5625) internal successors, (2777), 16 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:05,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:05,394 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:05,394 INFO L175 Difference]: Start difference. First operand has 334 places, 449 transitions, 10940 flow. Second operand 16 states and 2777 transitions. [2023-08-30 19:23:05,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 487 transitions, 12329 flow [2023-08-30 19:23:05,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 487 transitions, 11966 flow, removed 77 selfloop flow, removed 10 redundant places. [2023-08-30 19:23:05,854 INFO L231 Difference]: Finished difference. Result has 336 places, 445 transitions, 10801 flow [2023-08-30 19:23:05,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=10516, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10801, PETRI_PLACES=336, PETRI_TRANSITIONS=445} [2023-08-30 19:23:05,855 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 316 predicate places. [2023-08-30 19:23:05,855 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 445 transitions, 10801 flow [2023-08-30 19:23:05,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:05,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:05,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:05,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:06,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:06,061 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:06,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1081948156, now seen corresponding path program 31 times [2023-08-30 19:23:06,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:06,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545337580] [2023-08-30 19:23:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:06,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:06,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545337580] [2023-08-30 19:23:06,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545337580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:06,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573726182] [2023-08-30 19:23:06,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:23:06,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:06,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:06,567 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:06,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 19:23:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:06,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:06,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:06,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:07,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573726182] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:07,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:07,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 19:23:07,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938808990] [2023-08-30 19:23:07,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:07,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:23:07,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:23:07,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:23:07,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:07,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 445 transitions, 10801 flow. Second operand has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:07,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:07,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:07,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:08,404 INFO L130 PetriNetUnfolder]: 1351/2773 cut-off events. [2023-08-30 19:23:08,404 INFO L131 PetriNetUnfolder]: For 111219/111221 co-relation queries the response was YES. [2023-08-30 19:23:08,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29422 conditions, 2773 events. 1351/2773 cut-off events. For 111219/111221 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 20272 event pairs, 91 based on Foata normal form. 5/2773 useless extension candidates. Maximal degree in co-relation 29309. Up to 2167 conditions per place. [2023-08-30 19:23:08,440 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 455 selfloop transitions, 105 changer transitions 15/585 dead transitions. [2023-08-30 19:23:08,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 585 transitions, 14581 flow [2023-08-30 19:23:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:23:08,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:23:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1851 transitions. [2023-08-30 19:23:08,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084289496910856 [2023-08-30 19:23:08,448 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1851 transitions. [2023-08-30 19:23:08,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1851 transitions. [2023-08-30 19:23:08,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:08,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1851 transitions. [2023-08-30 19:23:08,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.27272727272728) internal successors, (1851), 11 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:08,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:08,452 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:08,452 INFO L175 Difference]: Start difference. First operand has 336 places, 445 transitions, 10801 flow. Second operand 11 states and 1851 transitions. [2023-08-30 19:23:08,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 585 transitions, 14581 flow [2023-08-30 19:23:09,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 585 transitions, 14247 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-30 19:23:09,054 INFO L231 Difference]: Finished difference. Result has 338 places, 507 transitions, 12541 flow [2023-08-30 19:23:09,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=10548, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12541, PETRI_PLACES=338, PETRI_TRANSITIONS=507} [2023-08-30 19:23:09,055 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2023-08-30 19:23:09,055 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 507 transitions, 12541 flow [2023-08-30 19:23:09,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:09,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:09,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:09,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-30 19:23:09,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:09,261 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:09,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:09,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1129985218, now seen corresponding path program 32 times [2023-08-30 19:23:09,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:09,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700818209] [2023-08-30 19:23:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:09,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:09,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:09,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700818209] [2023-08-30 19:23:09,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700818209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:09,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445182059] [2023-08-30 19:23:09,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:23:09,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:09,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:09,596 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:09,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 19:23:09,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:23:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:09,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:09,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:09,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:09,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445182059] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:09,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:09,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 19:23:09,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858277492] [2023-08-30 19:23:09,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:09,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:23:09,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:09,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:23:09,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:23:10,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:10,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 507 transitions, 12541 flow. Second operand has 15 states, 15 states have (on average 163.2) internal successors, (2448), 15 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:10,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:10,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:10,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:11,203 INFO L130 PetriNetUnfolder]: 1355/2761 cut-off events. [2023-08-30 19:23:11,203 INFO L131 PetriNetUnfolder]: For 115617/115619 co-relation queries the response was YES. [2023-08-30 19:23:11,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30483 conditions, 2761 events. 1355/2761 cut-off events. For 115617/115619 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 19967 event pairs, 103 based on Foata normal form. 7/2763 useless extension candidates. Maximal degree in co-relation 30361. Up to 2380 conditions per place. [2023-08-30 19:23:11,230 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 456 selfloop transitions, 79 changer transitions 17/562 dead transitions. [2023-08-30 19:23:11,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 562 transitions, 14236 flow [2023-08-30 19:23:11,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 19:23:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 19:23:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2004 transitions. [2023-08-30 19:23:11,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053398058252427 [2023-08-30 19:23:11,234 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2004 transitions. [2023-08-30 19:23:11,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2004 transitions. [2023-08-30 19:23:11,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:11,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2004 transitions. [2023-08-30 19:23:11,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 167.0) internal successors, (2004), 12 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:11,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:11,239 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:11,239 INFO L175 Difference]: Start difference. First operand has 338 places, 507 transitions, 12541 flow. Second operand 12 states and 2004 transitions. [2023-08-30 19:23:11,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 562 transitions, 14236 flow [2023-08-30 19:23:11,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 562 transitions, 13816 flow, removed 205 selfloop flow, removed 4 redundant places. [2023-08-30 19:23:11,941 INFO L231 Difference]: Finished difference. Result has 348 places, 513 transitions, 12589 flow [2023-08-30 19:23:11,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12177, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12589, PETRI_PLACES=348, PETRI_TRANSITIONS=513} [2023-08-30 19:23:11,943 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 328 predicate places. [2023-08-30 19:23:11,943 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 513 transitions, 12589 flow [2023-08-30 19:23:11,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 163.2) internal successors, (2448), 15 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:11,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:11,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:11,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:12,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-30 19:23:12,149 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:12,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:12,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1044264796, now seen corresponding path program 33 times [2023-08-30 19:23:12,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:12,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798762107] [2023-08-30 19:23:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:12,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:12,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:12,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798762107] [2023-08-30 19:23:12,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798762107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:12,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972208023] [2023-08-30 19:23:12,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:23:12,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:12,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:12,609 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:12,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 19:23:12,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:23:12,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:12,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:12,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:12,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:13,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972208023] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:13,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:13,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 19:23:13,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106883006] [2023-08-30 19:23:13,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:13,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:23:13,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:13,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:23:13,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:23:13,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:13,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 513 transitions, 12589 flow. Second operand has 20 states, 20 states have (on average 162.9) internal successors, (3258), 20 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:13,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:13,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:13,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:14,275 INFO L130 PetriNetUnfolder]: 1324/2676 cut-off events. [2023-08-30 19:23:14,276 INFO L131 PetriNetUnfolder]: For 105638/105640 co-relation queries the response was YES. [2023-08-30 19:23:14,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29112 conditions, 2676 events. 1324/2676 cut-off events. For 105638/105640 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 19077 event pairs, 90 based on Foata normal form. 3/2674 useless extension candidates. Maximal degree in co-relation 28988. Up to 2174 conditions per place. [2023-08-30 19:23:14,307 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 446 selfloop transitions, 102 changer transitions 5/563 dead transitions. [2023-08-30 19:23:14,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 563 transitions, 14228 flow [2023-08-30 19:23:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:23:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:23:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1516 transitions. [2023-08-30 19:23:14,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40884573894282633 [2023-08-30 19:23:14,309 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1516 transitions. [2023-08-30 19:23:14,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1516 transitions. [2023-08-30 19:23:14,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:14,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1516 transitions. [2023-08-30 19:23:14,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.44444444444446) internal successors, (1516), 9 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:14,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:14,312 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:14,312 INFO L175 Difference]: Start difference. First operand has 348 places, 513 transitions, 12589 flow. Second operand 9 states and 1516 transitions. [2023-08-30 19:23:14,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 563 transitions, 14228 flow [2023-08-30 19:23:15,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 563 transitions, 13823 flow, removed 147 selfloop flow, removed 6 redundant places. [2023-08-30 19:23:15,029 INFO L231 Difference]: Finished difference. Result has 349 places, 515 transitions, 12553 flow [2023-08-30 19:23:15,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12204, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12553, PETRI_PLACES=349, PETRI_TRANSITIONS=515} [2023-08-30 19:23:15,030 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 329 predicate places. [2023-08-30 19:23:15,030 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 515 transitions, 12553 flow [2023-08-30 19:23:15,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 162.9) internal successors, (3258), 20 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:15,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:15,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:15,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:15,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 19:23:15,236 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:15,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash -392624, now seen corresponding path program 34 times [2023-08-30 19:23:15,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:15,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578405628] [2023-08-30 19:23:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:15,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:15,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:15,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578405628] [2023-08-30 19:23:15,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578405628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:15,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352319075] [2023-08-30 19:23:15,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:23:15,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:15,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:15,501 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:15,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 19:23:15,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:23:15,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:15,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:15,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:15,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:15,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352319075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:15,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:15,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 19:23:15,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52486968] [2023-08-30 19:23:15,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:15,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:23:15,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:15,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:23:15,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:23:16,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:16,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 515 transitions, 12553 flow. Second operand has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:16,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:16,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:16,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:17,020 INFO L130 PetriNetUnfolder]: 1315/2649 cut-off events. [2023-08-30 19:23:17,021 INFO L131 PetriNetUnfolder]: For 106535/106537 co-relation queries the response was YES. [2023-08-30 19:23:17,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28554 conditions, 2649 events. 1315/2649 cut-off events. For 106535/106537 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18800 event pairs, 89 based on Foata normal form. 3/2647 useless extension candidates. Maximal degree in co-relation 28430. Up to 2246 conditions per place. [2023-08-30 19:23:17,048 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 454 selfloop transitions, 95 changer transitions 5/564 dead transitions. [2023-08-30 19:23:17,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 564 transitions, 14059 flow [2023-08-30 19:23:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:23:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:23:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1841 transitions. [2023-08-30 19:23:17,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40622241835834066 [2023-08-30 19:23:17,050 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1841 transitions. [2023-08-30 19:23:17,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1841 transitions. [2023-08-30 19:23:17,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:17,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1841 transitions. [2023-08-30 19:23:17,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 167.36363636363637) internal successors, (1841), 11 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) [2023-08-30 19:23:17,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:17,053 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:17,053 INFO L175 Difference]: Start difference. First operand has 349 places, 515 transitions, 12553 flow. Second operand 11 states and 1841 transitions. [2023-08-30 19:23:17,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 564 transitions, 14059 flow [2023-08-30 19:23:17,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 564 transitions, 13815 flow, removed 41 selfloop flow, removed 6 redundant places. [2023-08-30 19:23:17,695 INFO L231 Difference]: Finished difference. Result has 354 places, 521 transitions, 12684 flow [2023-08-30 19:23:17,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12315, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12684, PETRI_PLACES=354, PETRI_TRANSITIONS=521} [2023-08-30 19:23:17,696 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 334 predicate places. [2023-08-30 19:23:17,696 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 521 transitions, 12684 flow [2023-08-30 19:23:17,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:17,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:17,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:17,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-30 19:23:17,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-30 19:23:17,902 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:17,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:17,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2125930154, now seen corresponding path program 35 times [2023-08-30 19:23:17,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:17,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608967536] [2023-08-30 19:23:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:17,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:18,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:18,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608967536] [2023-08-30 19:23:18,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608967536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:18,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125405279] [2023-08-30 19:23:18,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:23:18,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:18,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:18,185 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:18,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 19:23:18,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:23:18,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:18,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:18,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:18,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:18,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125405279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:18,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:18,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-30 19:23:18,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274624258] [2023-08-30 19:23:18,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:18,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:23:18,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:23:18,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:23:18,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:18,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 521 transitions, 12684 flow. Second operand has 17 states, 17 states have (on average 163.1764705882353) internal successors, (2774), 17 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:18,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:18,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:18,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:19,679 INFO L130 PetriNetUnfolder]: 1394/2843 cut-off events. [2023-08-30 19:23:19,679 INFO L131 PetriNetUnfolder]: For 115875/115877 co-relation queries the response was YES. [2023-08-30 19:23:19,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30514 conditions, 2843 events. 1394/2843 cut-off events. For 115875/115877 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 20650 event pairs, 110 based on Foata normal form. 4/2842 useless extension candidates. Maximal degree in co-relation 30389. Up to 2509 conditions per place. [2023-08-30 19:23:19,715 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 488 selfloop transitions, 90 changer transitions 6/594 dead transitions. [2023-08-30 19:23:19,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 594 transitions, 15081 flow [2023-08-30 19:23:19,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:23:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:23:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-08-30 19:23:19,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077669902912621 [2023-08-30 19:23:19,717 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-08-30 19:23:19,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-08-30 19:23:19,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:19,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-08-30 19:23:19,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:19,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:19,720 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:19,720 INFO L175 Difference]: Start difference. First operand has 354 places, 521 transitions, 12684 flow. Second operand 8 states and 1344 transitions. [2023-08-30 19:23:19,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 594 transitions, 15081 flow [2023-08-30 19:23:20,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 594 transitions, 14861 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-08-30 19:23:20,517 INFO L231 Difference]: Finished difference. Result has 355 places, 556 transitions, 13700 flow [2023-08-30 19:23:20,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12470, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13700, PETRI_PLACES=355, PETRI_TRANSITIONS=556} [2023-08-30 19:23:20,518 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 335 predicate places. [2023-08-30 19:23:20,518 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 556 transitions, 13700 flow [2023-08-30 19:23:20,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.1764705882353) internal successors, (2774), 17 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:20,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:20,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:20,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:20,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 19:23:20,724 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:20,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:20,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2021571692, now seen corresponding path program 36 times [2023-08-30 19:23:20,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:20,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486986790] [2023-08-30 19:23:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:20,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:20,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:20,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486986790] [2023-08-30 19:23:20,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486986790] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:20,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846012201] [2023-08-30 19:23:20,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:23:20,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:20,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:20,989 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:20,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 19:23:21,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:23:21,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:21,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:21,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:21,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:21,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846012201] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:21,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:21,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-30 19:23:21,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455586613] [2023-08-30 19:23:21,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:21,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:23:21,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:21,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:23:21,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:23:21,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:21,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 556 transitions, 13700 flow. Second operand has 17 states, 17 states have (on average 163.23529411764707) internal successors, (2775), 17 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:21,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:21,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:21,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:22,486 INFO L130 PetriNetUnfolder]: 1382/2807 cut-off events. [2023-08-30 19:23:22,487 INFO L131 PetriNetUnfolder]: For 118289/118291 co-relation queries the response was YES. [2023-08-30 19:23:22,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30558 conditions, 2807 events. 1382/2807 cut-off events. For 118289/118291 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 20271 event pairs, 110 based on Foata normal form. 4/2806 useless extension candidates. Maximal degree in co-relation 30431. Up to 2509 conditions per place. [2023-08-30 19:23:22,514 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 489 selfloop transitions, 85 changer transitions 9/593 dead transitions. [2023-08-30 19:23:22,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 593 transitions, 15227 flow [2023-08-30 19:23:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:23:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:23:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-08-30 19:23:22,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077669902912621 [2023-08-30 19:23:22,516 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-08-30 19:23:22,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-08-30 19:23:22,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:22,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-08-30 19:23:22,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:22,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:22,519 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:22,519 INFO L175 Difference]: Start difference. First operand has 355 places, 556 transitions, 13700 flow. Second operand 8 states and 1344 transitions. [2023-08-30 19:23:22,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 593 transitions, 15227 flow [2023-08-30 19:23:23,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 593 transitions, 14866 flow, removed 131 selfloop flow, removed 4 redundant places. [2023-08-30 19:23:23,229 INFO L231 Difference]: Finished difference. Result has 360 places, 556 transitions, 13593 flow [2023-08-30 19:23:23,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=13375, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13593, PETRI_PLACES=360, PETRI_TRANSITIONS=556} [2023-08-30 19:23:23,230 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 340 predicate places. [2023-08-30 19:23:23,230 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 556 transitions, 13593 flow [2023-08-30 19:23:23,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.23529411764707) internal successors, (2775), 17 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:23,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:23,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:23,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:23,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:23,436 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:23,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:23,436 INFO L85 PathProgramCache]: Analyzing trace with hash -940248734, now seen corresponding path program 37 times [2023-08-30 19:23:23,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:23,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300137047] [2023-08-30 19:23:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:23,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:23,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:23,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300137047] [2023-08-30 19:23:23,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300137047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:23,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401140554] [2023-08-30 19:23:23,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:23:23,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:23,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:23,686 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:23,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 19:23:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:23,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:23,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:23,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:24,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401140554] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:24,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:24,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-30 19:23:24,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103141553] [2023-08-30 19:23:24,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:24,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:23:24,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:24,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:23:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:23:24,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:24,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 556 transitions, 13593 flow. Second operand has 17 states, 17 states have (on average 163.23529411764707) internal successors, (2775), 17 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:24,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:24,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:24,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:25,213 INFO L130 PetriNetUnfolder]: 1376/2773 cut-off events. [2023-08-30 19:23:25,213 INFO L131 PetriNetUnfolder]: For 114040/114042 co-relation queries the response was YES. [2023-08-30 19:23:25,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30062 conditions, 2773 events. 1376/2773 cut-off events. For 114040/114042 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19832 event pairs, 116 based on Foata normal form. 4/2772 useless extension candidates. Maximal degree in co-relation 29933. Up to 2558 conditions per place. [2023-08-30 19:23:25,242 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 504 selfloop transitions, 67 changer transitions 7/588 dead transitions. [2023-08-30 19:23:25,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 588 transitions, 15009 flow [2023-08-30 19:23:25,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:23:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:23:25,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1339 transitions. [2023-08-30 19:23:25,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2023-08-30 19:23:25,244 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1339 transitions. [2023-08-30 19:23:25,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1339 transitions. [2023-08-30 19:23:25,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:25,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1339 transitions. [2023-08-30 19:23:25,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.375) internal successors, (1339), 8 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:25,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:25,247 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:25,247 INFO L175 Difference]: Start difference. First operand has 360 places, 556 transitions, 13593 flow. Second operand 8 states and 1339 transitions. [2023-08-30 19:23:25,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 588 transitions, 15009 flow [2023-08-30 19:23:25,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 588 transitions, 14876 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-30 19:23:25,980 INFO L231 Difference]: Finished difference. Result has 365 places, 559 transitions, 13732 flow [2023-08-30 19:23:25,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=13464, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13732, PETRI_PLACES=365, PETRI_TRANSITIONS=559} [2023-08-30 19:23:25,981 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 345 predicate places. [2023-08-30 19:23:25,981 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 559 transitions, 13732 flow [2023-08-30 19:23:25,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.23529411764707) internal successors, (2775), 17 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:25,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:25,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:25,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:26,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-30 19:23:26,187 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:26,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:26,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1160083242, now seen corresponding path program 38 times [2023-08-30 19:23:26,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:26,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484097171] [2023-08-30 19:23:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:26,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:26,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:26,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484097171] [2023-08-30 19:23:26,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484097171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:26,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749511652] [2023-08-30 19:23:26,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:23:26,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:26,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:26,515 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:26,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 19:23:26,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:23:26,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:26,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:26,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:26,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:26,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749511652] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:26,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:26,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-08-30 19:23:26,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170867192] [2023-08-30 19:23:26,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:26,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:23:26,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:26,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:23:26,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:23:27,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 412 [2023-08-30 19:23:27,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 559 transitions, 13732 flow. Second operand has 17 states, 17 states have (on average 160.11764705882354) internal successors, (2722), 17 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:27,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:27,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 412 [2023-08-30 19:23:27,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:28,233 INFO L130 PetriNetUnfolder]: 1481/3017 cut-off events. [2023-08-30 19:23:28,233 INFO L131 PetriNetUnfolder]: For 126145/126147 co-relation queries the response was YES. [2023-08-30 19:23:28,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32741 conditions, 3017 events. 1481/3017 cut-off events. For 126145/126147 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 22201 event pairs, 114 based on Foata normal form. 9/3021 useless extension candidates. Maximal degree in co-relation 32610. Up to 2625 conditions per place. [2023-08-30 19:23:28,265 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 542 selfloop transitions, 98 changer transitions 25/675 dead transitions. [2023-08-30 19:23:28,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 675 transitions, 17044 flow [2023-08-30 19:23:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:23:28,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:23:28,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2132 transitions. [2023-08-30 19:23:28,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39805825242718446 [2023-08-30 19:23:28,267 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2132 transitions. [2023-08-30 19:23:28,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2132 transitions. [2023-08-30 19:23:28,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:28,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2132 transitions. [2023-08-30 19:23:28,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 164.0) internal successors, (2132), 13 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:28,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:28,272 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:28,272 INFO L175 Difference]: Start difference. First operand has 365 places, 559 transitions, 13732 flow. Second operand 13 states and 2132 transitions. [2023-08-30 19:23:28,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 675 transitions, 17044 flow [2023-08-30 19:23:29,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 675 transitions, 16773 flow, removed 62 selfloop flow, removed 6 redundant places. [2023-08-30 19:23:29,250 INFO L231 Difference]: Finished difference. Result has 380 places, 613 transitions, 15208 flow [2023-08-30 19:23:29,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=13469, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15208, PETRI_PLACES=380, PETRI_TRANSITIONS=613} [2023-08-30 19:23:29,251 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 360 predicate places. [2023-08-30 19:23:29,252 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 613 transitions, 15208 flow [2023-08-30 19:23:29,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 160.11764705882354) internal successors, (2722), 17 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:29,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:29,252 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:29,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:29,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 19:23:29,457 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:29,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:29,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1875827202, now seen corresponding path program 39 times [2023-08-30 19:23:29,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:29,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188387676] [2023-08-30 19:23:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:29,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:29,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:29,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188387676] [2023-08-30 19:23:29,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188387676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:29,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790739279] [2023-08-30 19:23:29,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:23:29,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:29,717 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:29,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 19:23:29,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:23:29,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:29,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:29,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:29,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:30,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790739279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:30,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:30,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 19:23:30,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149538606] [2023-08-30 19:23:30,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:30,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:23:30,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:30,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:23:30,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:23:30,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:30,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 613 transitions, 15208 flow. Second operand has 20 states, 20 states have (on average 162.9) internal successors, (3258), 20 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:30,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:30,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:30,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:31,666 INFO L130 PetriNetUnfolder]: 1572/3187 cut-off events. [2023-08-30 19:23:31,666 INFO L131 PetriNetUnfolder]: For 149767/149769 co-relation queries the response was YES. [2023-08-30 19:23:31,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35630 conditions, 3187 events. 1572/3187 cut-off events. For 149767/149769 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 23588 event pairs, 125 based on Foata normal form. 6/3188 useless extension candidates. Maximal degree in co-relation 35490. Up to 2651 conditions per place. [2023-08-30 19:23:31,701 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 560 selfloop transitions, 118 changer transitions 15/703 dead transitions. [2023-08-30 19:23:31,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 703 transitions, 18266 flow [2023-08-30 19:23:31,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:23:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:23:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1843 transitions. [2023-08-30 19:23:31,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066637246248897 [2023-08-30 19:23:31,711 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1843 transitions. [2023-08-30 19:23:31,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1843 transitions. [2023-08-30 19:23:31,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:31,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1843 transitions. [2023-08-30 19:23:31,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 167.54545454545453) internal successors, (1843), 11 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:31,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:31,715 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:31,715 INFO L175 Difference]: Start difference. First operand has 380 places, 613 transitions, 15208 flow. Second operand 11 states and 1843 transitions. [2023-08-30 19:23:31,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 703 transitions, 18266 flow [2023-08-30 19:23:32,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 703 transitions, 17761 flow, removed 249 selfloop flow, removed 3 redundant places. [2023-08-30 19:23:32,629 INFO L231 Difference]: Finished difference. Result has 391 places, 645 transitions, 16081 flow [2023-08-30 19:23:32,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=14721, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16081, PETRI_PLACES=391, PETRI_TRANSITIONS=645} [2023-08-30 19:23:32,629 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 371 predicate places. [2023-08-30 19:23:32,630 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 645 transitions, 16081 flow [2023-08-30 19:23:32,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 162.9) internal successors, (3258), 20 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:32,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:32,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:32,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:32,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 19:23:32,835 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:32,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:32,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1336639400, now seen corresponding path program 40 times [2023-08-30 19:23:32,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:32,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547374230] [2023-08-30 19:23:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:32,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:33,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:33,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547374230] [2023-08-30 19:23:33,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547374230] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:33,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485580632] [2023-08-30 19:23:33,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:23:33,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:33,079 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:33,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 19:23:33,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:23:33,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:33,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:33,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:33,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:33,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485580632] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:33,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:33,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-30 19:23:33,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823593867] [2023-08-30 19:23:33,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:33,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:23:33,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:23:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:23:33,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:33,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 645 transitions, 16081 flow. Second operand has 17 states, 17 states have (on average 163.11764705882354) internal successors, (2773), 17 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:33,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:33,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:33,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:34,813 INFO L130 PetriNetUnfolder]: 1610/3255 cut-off events. [2023-08-30 19:23:34,813 INFO L131 PetriNetUnfolder]: For 156258/156260 co-relation queries the response was YES. [2023-08-30 19:23:34,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36511 conditions, 3255 events. 1610/3255 cut-off events. For 156258/156260 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 24094 event pairs, 125 based on Foata normal form. 4/3254 useless extension candidates. Maximal degree in co-relation 36366. Up to 2986 conditions per place. [2023-08-30 19:23:34,853 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 604 selfloop transitions, 76 changer transitions 6/696 dead transitions. [2023-08-30 19:23:34,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 696 transitions, 18224 flow [2023-08-30 19:23:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:23:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:23:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1503 transitions. [2023-08-30 19:23:34,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053398058252427 [2023-08-30 19:23:34,869 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1503 transitions. [2023-08-30 19:23:34,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1503 transitions. [2023-08-30 19:23:34,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:34,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1503 transitions. [2023-08-30 19:23:34,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:34,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:34,882 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:34,883 INFO L175 Difference]: Start difference. First operand has 391 places, 645 transitions, 16081 flow. Second operand 9 states and 1503 transitions. [2023-08-30 19:23:34,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 696 transitions, 18224 flow [2023-08-30 19:23:36,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 696 transitions, 17740 flow, removed 197 selfloop flow, removed 6 redundant places. [2023-08-30 19:23:36,096 INFO L231 Difference]: Finished difference. Result has 395 places, 666 transitions, 16436 flow [2023-08-30 19:23:36,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=15609, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16436, PETRI_PLACES=395, PETRI_TRANSITIONS=666} [2023-08-30 19:23:36,097 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2023-08-30 19:23:36,098 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 666 transitions, 16436 flow [2023-08-30 19:23:36,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.11764705882354) internal successors, (2773), 17 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:36,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:36,098 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:36,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:36,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:36,303 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:36,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:36,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263854, now seen corresponding path program 41 times [2023-08-30 19:23:36,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:36,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86589205] [2023-08-30 19:23:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:36,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:36,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:36,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86589205] [2023-08-30 19:23:36,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86589205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:36,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618186608] [2023-08-30 19:23:36,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:23:36,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:36,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:36,621 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:36,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 19:23:36,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:23:36,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:36,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:36,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:36,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:37,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618186608] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:37,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:37,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-08-30 19:23:37,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464138197] [2023-08-30 19:23:37,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:37,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:23:37,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:37,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:23:37,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:23:37,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:37,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 666 transitions, 16436 flow. Second operand has 19 states, 19 states have (on average 163.10526315789474) internal successors, (3099), 19 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:37,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:37,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:37,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:38,443 INFO L130 PetriNetUnfolder]: 1669/3389 cut-off events. [2023-08-30 19:23:38,443 INFO L131 PetriNetUnfolder]: For 146357/146359 co-relation queries the response was YES. [2023-08-30 19:23:38,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37004 conditions, 3389 events. 1669/3389 cut-off events. For 146357/146359 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 25388 event pairs, 128 based on Foata normal form. 5/3389 useless extension candidates. Maximal degree in co-relation 36858. Up to 3011 conditions per place. [2023-08-30 19:23:38,482 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 612 selfloop transitions, 101 changer transitions 7/730 dead transitions. [2023-08-30 19:23:38,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 730 transitions, 18849 flow [2023-08-30 19:23:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:23:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:23:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1347 transitions. [2023-08-30 19:23:38,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4086771844660194 [2023-08-30 19:23:38,484 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1347 transitions. [2023-08-30 19:23:38,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1347 transitions. [2023-08-30 19:23:38,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:38,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1347 transitions. [2023-08-30 19:23:38,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.375) internal successors, (1347), 8 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:38,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:38,487 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:38,487 INFO L175 Difference]: Start difference. First operand has 395 places, 666 transitions, 16436 flow. Second operand 8 states and 1347 transitions. [2023-08-30 19:23:38,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 730 transitions, 18849 flow [2023-08-30 19:23:39,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 730 transitions, 18501 flow, removed 125 selfloop flow, removed 5 redundant places. [2023-08-30 19:23:39,651 INFO L231 Difference]: Finished difference. Result has 399 places, 692 transitions, 17072 flow [2023-08-30 19:23:39,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=16094, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17072, PETRI_PLACES=399, PETRI_TRANSITIONS=692} [2023-08-30 19:23:39,651 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-08-30 19:23:39,652 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 692 transitions, 17072 flow [2023-08-30 19:23:39,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 163.10526315789474) internal successors, (3099), 19 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:39,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:39,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:39,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:39,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:39,857 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:39,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:39,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1615598274, now seen corresponding path program 42 times [2023-08-30 19:23:39,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:39,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558856756] [2023-08-30 19:23:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:39,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:40,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:40,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558856756] [2023-08-30 19:23:40,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558856756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:40,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119937133] [2023-08-30 19:23:40,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:23:40,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:40,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:40,258 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:40,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 19:23:40,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:23:40,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:40,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:40,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119937133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:40,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:40,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-08-30 19:23:40,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771716000] [2023-08-30 19:23:40,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:40,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:23:40,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:40,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:23:40,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:23:40,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:40,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 692 transitions, 17072 flow. Second operand has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:40,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:40,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:40,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:42,108 INFO L130 PetriNetUnfolder]: 1664/3354 cut-off events. [2023-08-30 19:23:42,108 INFO L131 PetriNetUnfolder]: For 147446/147448 co-relation queries the response was YES. [2023-08-30 19:23:42,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36721 conditions, 3354 events. 1664/3354 cut-off events. For 147446/147448 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 24919 event pairs, 125 based on Foata normal form. 5/3354 useless extension candidates. Maximal degree in co-relation 36573. Up to 3011 conditions per place. [2023-08-30 19:23:42,143 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 610 selfloop transitions, 98 changer transitions 8/726 dead transitions. [2023-08-30 19:23:42,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 726 transitions, 18740 flow [2023-08-30 19:23:42,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:23:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:23:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1508 transitions. [2023-08-30 19:23:42,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40668824163969797 [2023-08-30 19:23:42,145 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1508 transitions. [2023-08-30 19:23:42,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1508 transitions. [2023-08-30 19:23:42,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:42,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1508 transitions. [2023-08-30 19:23:42,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.55555555555554) internal successors, (1508), 9 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:42,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:42,148 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:42,148 INFO L175 Difference]: Start difference. First operand has 399 places, 692 transitions, 17072 flow. Second operand 9 states and 1508 transitions. [2023-08-30 19:23:42,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 726 transitions, 18740 flow [2023-08-30 19:23:43,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 726 transitions, 18462 flow, removed 67 selfloop flow, removed 5 redundant places. [2023-08-30 19:23:43,275 INFO L231 Difference]: Finished difference. Result has 403 places, 692 transitions, 17068 flow [2023-08-30 19:23:43,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=16798, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17068, PETRI_PLACES=403, PETRI_TRANSITIONS=692} [2023-08-30 19:23:43,276 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2023-08-30 19:23:43,276 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 692 transitions, 17068 flow [2023-08-30 19:23:43,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:43,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:43,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:43,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:43,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:43,482 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:43,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash -210237672, now seen corresponding path program 43 times [2023-08-30 19:23:43,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:43,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505027573] [2023-08-30 19:23:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:43,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:43,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:43,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505027573] [2023-08-30 19:23:43,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505027573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:43,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430609733] [2023-08-30 19:23:43,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:23:43,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:43,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:43,719 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:43,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 19:23:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:43,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:43,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:43,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:44,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430609733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:44,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:44,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 19:23:44,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474045456] [2023-08-30 19:23:44,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:44,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:23:44,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:44,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:23:44,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:23:44,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:44,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 692 transitions, 17068 flow. Second operand has 18 states, 18 states have (on average 163.11111111111111) internal successors, (2936), 18 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:44,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:44,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:44,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:45,739 INFO L130 PetriNetUnfolder]: 1648/3305 cut-off events. [2023-08-30 19:23:45,740 INFO L131 PetriNetUnfolder]: For 144278/144280 co-relation queries the response was YES. [2023-08-30 19:23:45,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36316 conditions, 3305 events. 1648/3305 cut-off events. For 144278/144280 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 24310 event pairs, 127 based on Foata normal form. 4/3304 useless extension candidates. Maximal degree in co-relation 36167. Up to 2910 conditions per place. [2023-08-30 19:23:45,778 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 612 selfloop transitions, 116 changer transitions 5/743 dead transitions. [2023-08-30 19:23:45,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 743 transitions, 19087 flow [2023-08-30 19:23:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:23:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:23:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1840 transitions. [2023-08-30 19:23:45,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4060017652250662 [2023-08-30 19:23:45,780 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1840 transitions. [2023-08-30 19:23:45,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1840 transitions. [2023-08-30 19:23:45,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:45,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1840 transitions. [2023-08-30 19:23:45,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 167.27272727272728) internal successors, (1840), 11 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:45,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:45,784 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:45,784 INFO L175 Difference]: Start difference. First operand has 403 places, 692 transitions, 17068 flow. Second operand 11 states and 1840 transitions. [2023-08-30 19:23:45,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 743 transitions, 19087 flow [2023-08-30 19:23:46,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 743 transitions, 18935 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 19:23:46,896 INFO L231 Difference]: Finished difference. Result has 410 places, 702 transitions, 17441 flow [2023-08-30 19:23:46,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=16924, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17441, PETRI_PLACES=410, PETRI_TRANSITIONS=702} [2023-08-30 19:23:46,896 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 390 predicate places. [2023-08-30 19:23:46,896 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 702 transitions, 17441 flow [2023-08-30 19:23:46,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.11111111111111) internal successors, (2936), 18 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:46,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:46,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:46,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:47,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-30 19:23:47,102 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:47,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:47,102 INFO L85 PathProgramCache]: Analyzing trace with hash 639122522, now seen corresponding path program 44 times [2023-08-30 19:23:47,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:47,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145402802] [2023-08-30 19:23:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:47,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:47,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:47,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145402802] [2023-08-30 19:23:47,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145402802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:47,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642213725] [2023-08-30 19:23:47,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:23:47,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:47,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:47,343 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:47,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 19:23:47,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:23:47,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:47,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 19:23:47,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:47,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642213725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:47,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:47,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 19:23:47,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337866833] [2023-08-30 19:23:47,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:47,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:23:47,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:47,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:23:47,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:23:47,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-30 19:23:47,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 702 transitions, 17441 flow. Second operand has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:47,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:47,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-30 19:23:47,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:49,088 INFO L130 PetriNetUnfolder]: 1644/3278 cut-off events. [2023-08-30 19:23:49,088 INFO L131 PetriNetUnfolder]: For 145082/145084 co-relation queries the response was YES. [2023-08-30 19:23:49,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36336 conditions, 3278 events. 1644/3278 cut-off events. For 145082/145084 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 23893 event pairs, 134 based on Foata normal form. 3/3276 useless extension candidates. Maximal degree in co-relation 36185. Up to 2831 conditions per place. [2023-08-30 19:23:49,126 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 604 selfloop transitions, 119 changer transitions 5/738 dead transitions. [2023-08-30 19:23:49,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 738 transitions, 19267 flow [2023-08-30 19:23:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:23:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:23:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1511 transitions. [2023-08-30 19:23:49,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40749730312837107 [2023-08-30 19:23:49,128 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1511 transitions. [2023-08-30 19:23:49,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1511 transitions. [2023-08-30 19:23:49,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:49,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1511 transitions. [2023-08-30 19:23:49,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.88888888888889) internal successors, (1511), 9 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:49,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:49,131 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:49,131 INFO L175 Difference]: Start difference. First operand has 410 places, 702 transitions, 17441 flow. Second operand 9 states and 1511 transitions. [2023-08-30 19:23:49,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 738 transitions, 19267 flow [2023-08-30 19:23:50,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 738 transitions, 18983 flow, removed 42 selfloop flow, removed 8 redundant places. [2023-08-30 19:23:50,264 INFO L231 Difference]: Finished difference. Result has 412 places, 704 transitions, 17544 flow [2023-08-30 19:23:50,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=17163, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17544, PETRI_PLACES=412, PETRI_TRANSITIONS=704} [2023-08-30 19:23:50,265 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-08-30 19:23:50,265 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 704 transitions, 17544 flow [2023-08-30 19:23:50,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:50,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:50,265 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:50,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:50,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-30 19:23:50,470 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:50,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash 708283217, now seen corresponding path program 45 times [2023-08-30 19:23:50,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:50,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512539145] [2023-08-30 19:23:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:50,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:50,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:50,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512539145] [2023-08-30 19:23:50,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512539145] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:50,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794226009] [2023-08-30 19:23:50,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:23:50,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:50,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:50,531 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:50,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 19:23:50,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:23:50,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:50,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:23:50,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:50,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:50,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794226009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:50,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:50,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-30 19:23:50,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526050478] [2023-08-30 19:23:50,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:50,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:23:50,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:50,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:23:50,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:23:50,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:23:50,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 704 transitions, 17544 flow. Second operand has 14 states, 14 states have (on average 171.21428571428572) internal successors, (2397), 14 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:50,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:50,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:23:50,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:52,202 INFO L130 PetriNetUnfolder]: 2101/4250 cut-off events. [2023-08-30 19:23:52,202 INFO L131 PetriNetUnfolder]: For 196854/196854 co-relation queries the response was YES. [2023-08-30 19:23:52,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46884 conditions, 4250 events. 2101/4250 cut-off events. For 196854/196854 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 32675 event pairs, 313 based on Foata normal form. 4/4254 useless extension candidates. Maximal degree in co-relation 46731. Up to 1463 conditions per place. [2023-08-30 19:23:52,252 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 549 selfloop transitions, 384 changer transitions 15/948 dead transitions. [2023-08-30 19:23:52,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 948 transitions, 25213 flow [2023-08-30 19:23:52,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:23:52,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:23:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2441 transitions. [2023-08-30 19:23:52,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42319694868238555 [2023-08-30 19:23:52,255 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2441 transitions. [2023-08-30 19:23:52,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2441 transitions. [2023-08-30 19:23:52,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:52,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2441 transitions. [2023-08-30 19:23:52,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 174.35714285714286) internal successors, (2441), 14 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:52,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:52,259 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:52,259 INFO L175 Difference]: Start difference. First operand has 412 places, 704 transitions, 17544 flow. Second operand 14 states and 2441 transitions. [2023-08-30 19:23:52,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 948 transitions, 25213 flow [2023-08-30 19:23:53,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 948 transitions, 24802 flow, removed 72 selfloop flow, removed 6 redundant places. [2023-08-30 19:23:53,852 INFO L231 Difference]: Finished difference. Result has 424 places, 845 transitions, 22362 flow [2023-08-30 19:23:53,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=17262, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=22362, PETRI_PLACES=424, PETRI_TRANSITIONS=845} [2023-08-30 19:23:53,852 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 404 predicate places. [2023-08-30 19:23:53,853 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 845 transitions, 22362 flow [2023-08-30 19:23:53,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 171.21428571428572) internal successors, (2397), 14 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:53,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:53,853 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:53,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:54,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-30 19:23:54,058 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:54,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1132772869, now seen corresponding path program 46 times [2023-08-30 19:23:54,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:54,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130093316] [2023-08-30 19:23:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:54,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:54,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130093316] [2023-08-30 19:23:54,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130093316] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:54,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164323410] [2023-08-30 19:23:54,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:23:54,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:54,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:54,120 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:54,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 19:23:54,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:23:54,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:54,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:23:54,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:54,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:54,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164323410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:54,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:54,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-30 19:23:54,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371933754] [2023-08-30 19:23:54,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:54,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:23:54,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:54,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:23:54,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:23:54,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:23:54,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 845 transitions, 22362 flow. Second operand has 14 states, 14 states have (on average 171.07142857142858) internal successors, (2395), 14 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:54,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:54,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:23:54,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:56,043 INFO L130 PetriNetUnfolder]: 2208/4437 cut-off events. [2023-08-30 19:23:56,044 INFO L131 PetriNetUnfolder]: For 223350/223350 co-relation queries the response was YES. [2023-08-30 19:23:56,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50770 conditions, 4437 events. 2208/4437 cut-off events. For 223350/223350 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34327 event pairs, 212 based on Foata normal form. 36/4473 useless extension candidates. Maximal degree in co-relation 50612. Up to 2556 conditions per place. [2023-08-30 19:23:56,106 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 707 selfloop transitions, 265 changer transitions 0/972 dead transitions. [2023-08-30 19:23:56,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 972 transitions, 27055 flow [2023-08-30 19:23:56,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:23:56,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:23:56,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1587 transitions. [2023-08-30 19:23:56,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279935275080906 [2023-08-30 19:23:56,108 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1587 transitions. [2023-08-30 19:23:56,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1587 transitions. [2023-08-30 19:23:56,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:56,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1587 transitions. [2023-08-30 19:23:56,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:56,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:56,111 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:56,111 INFO L175 Difference]: Start difference. First operand has 424 places, 845 transitions, 22362 flow. Second operand 9 states and 1587 transitions. [2023-08-30 19:23:56,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 972 transitions, 27055 flow [2023-08-30 19:23:58,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 972 transitions, 26120 flow, removed 283 selfloop flow, removed 9 redundant places. [2023-08-30 19:23:58,309 INFO L231 Difference]: Finished difference. Result has 424 places, 877 transitions, 23083 flow [2023-08-30 19:23:58,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=21430, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23083, PETRI_PLACES=424, PETRI_TRANSITIONS=877} [2023-08-30 19:23:58,310 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 404 predicate places. [2023-08-30 19:23:58,310 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 877 transitions, 23083 flow [2023-08-30 19:23:58,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 171.07142857142858) internal successors, (2395), 14 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:58,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:58,311 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:58,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:58,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-30 19:23:58,516 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:23:58,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:58,516 INFO L85 PathProgramCache]: Analyzing trace with hash 991055867, now seen corresponding path program 47 times [2023-08-30 19:23:58,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:58,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600258058] [2023-08-30 19:23:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:58,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:58,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:58,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600258058] [2023-08-30 19:23:58,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600258058] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:58,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706265869] [2023-08-30 19:23:58,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:23:58,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:58,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:58,583 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:23:58,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 19:23:58,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 19:23:58,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:58,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:23:58,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:58,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:58,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706265869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:58,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:58,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 19:23:58,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205025956] [2023-08-30 19:23:58,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:58,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:23:58,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:58,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:23:58,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:23:58,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:23:58,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 877 transitions, 23083 flow. Second operand has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:58,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:58,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:23:58,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:01,117 INFO L130 PetriNetUnfolder]: 2459/4964 cut-off events. [2023-08-30 19:24:01,118 INFO L131 PetriNetUnfolder]: For 250906/250906 co-relation queries the response was YES. [2023-08-30 19:24:01,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57350 conditions, 4964 events. 2459/4964 cut-off events. For 250906/250906 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39471 event pairs, 182 based on Foata normal form. 62/5026 useless extension candidates. Maximal degree in co-relation 57192. Up to 3348 conditions per place. [2023-08-30 19:24:01,170 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 746 selfloop transitions, 307 changer transitions 0/1053 dead transitions. [2023-08-30 19:24:01,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1053 transitions, 29281 flow [2023-08-30 19:24:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 19:24:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 19:24:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3863 transitions. [2023-08-30 19:24:01,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42619152691968226 [2023-08-30 19:24:01,173 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3863 transitions. [2023-08-30 19:24:01,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3863 transitions. [2023-08-30 19:24:01,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:01,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3863 transitions. [2023-08-30 19:24:01,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 175.5909090909091) internal successors, (3863), 22 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:01,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:01,179 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:01,179 INFO L175 Difference]: Start difference. First operand has 424 places, 877 transitions, 23083 flow. Second operand 22 states and 3863 transitions. [2023-08-30 19:24:01,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1053 transitions, 29281 flow [2023-08-30 19:24:03,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1053 transitions, 28712 flow, removed 118 selfloop flow, removed 4 redundant places. [2023-08-30 19:24:03,157 INFO L231 Difference]: Finished difference. Result has 450 places, 951 transitions, 25904 flow [2023-08-30 19:24:03,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=22617, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25904, PETRI_PLACES=450, PETRI_TRANSITIONS=951} [2023-08-30 19:24:03,158 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 430 predicate places. [2023-08-30 19:24:03,158 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 951 transitions, 25904 flow [2023-08-30 19:24:03,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:03,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:03,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:03,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-30 19:24:03,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-30 19:24:03,363 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:24:03,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:03,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2067368727, now seen corresponding path program 48 times [2023-08-30 19:24:03,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:03,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119352319] [2023-08-30 19:24:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:03,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:03,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:03,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119352319] [2023-08-30 19:24:03,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119352319] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:03,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034435556] [2023-08-30 19:24:03,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:24:03,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:03,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:03,463 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:24:03,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 19:24:03,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:24:03,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:24:03,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:24:03,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:03,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:03,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034435556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:03,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:03,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 19:24:03,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944915327] [2023-08-30 19:24:03,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:03,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:24:03,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:03,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:24:03,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:24:03,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:24:03,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 951 transitions, 25904 flow. Second operand has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:03,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:03,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:24:03,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:05,861 INFO L130 PetriNetUnfolder]: 2467/5022 cut-off events. [2023-08-30 19:24:05,861 INFO L131 PetriNetUnfolder]: For 269687/269687 co-relation queries the response was YES. [2023-08-30 19:24:05,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59757 conditions, 5022 events. 2467/5022 cut-off events. For 269687/269687 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 40318 event pairs, 391 based on Foata normal form. 24/5046 useless extension candidates. Maximal degree in co-relation 59590. Up to 2025 conditions per place. [2023-08-30 19:24:05,925 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 635 selfloop transitions, 451 changer transitions 12/1098 dead transitions. [2023-08-30 19:24:05,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1098 transitions, 30772 flow [2023-08-30 19:24:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 19:24:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 19:24:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4525 transitions. [2023-08-30 19:24:05,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224234503360717 [2023-08-30 19:24:05,928 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4525 transitions. [2023-08-30 19:24:05,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4525 transitions. [2023-08-30 19:24:05,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:05,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4525 transitions. [2023-08-30 19:24:05,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 174.03846153846155) internal successors, (4525), 26 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:05,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:05,936 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:05,936 INFO L175 Difference]: Start difference. First operand has 450 places, 951 transitions, 25904 flow. Second operand 26 states and 4525 transitions. [2023-08-30 19:24:05,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1098 transitions, 30772 flow [2023-08-30 19:24:08,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1098 transitions, 29728 flow, removed 403 selfloop flow, removed 10 redundant places. [2023-08-30 19:24:08,599 INFO L231 Difference]: Finished difference. Result has 470 places, 964 transitions, 26544 flow [2023-08-30 19:24:08,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=24911, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=26544, PETRI_PLACES=470, PETRI_TRANSITIONS=964} [2023-08-30 19:24:08,600 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 450 predicate places. [2023-08-30 19:24:08,600 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 964 transitions, 26544 flow [2023-08-30 19:24:08,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:08,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:08,601 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:08,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-30 19:24:08,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-30 19:24:08,806 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:24:08,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:08,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1532439073, now seen corresponding path program 49 times [2023-08-30 19:24:08,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:08,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459560494] [2023-08-30 19:24:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:08,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:08,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:08,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459560494] [2023-08-30 19:24:08,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459560494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:08,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634958482] [2023-08-30 19:24:08,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:24:08,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:08,866 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:24:08,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-30 19:24:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:24:08,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:09,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:09,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634958482] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:09,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:09,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 19:24:09,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90438797] [2023-08-30 19:24:09,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:09,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:24:09,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:09,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:24:09,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:24:09,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:24:09,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 964 transitions, 26544 flow. Second operand has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:09,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:09,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:24:09,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:11,878 INFO L130 PetriNetUnfolder]: 2712/5497 cut-off events. [2023-08-30 19:24:11,878 INFO L131 PetriNetUnfolder]: For 320330/320330 co-relation queries the response was YES. [2023-08-30 19:24:11,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66845 conditions, 5497 events. 2712/5497 cut-off events. For 320330/320330 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 44732 event pairs, 338 based on Foata normal form. 44/5541 useless extension candidates. Maximal degree in co-relation 66674. Up to 1774 conditions per place. [2023-08-30 19:24:11,954 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 653 selfloop transitions, 534 changer transitions 11/1198 dead transitions. [2023-08-30 19:24:11,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1198 transitions, 34181 flow [2023-08-30 19:24:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 19:24:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 19:24:11,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4707 transitions. [2023-08-30 19:24:11,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231391585760518 [2023-08-30 19:24:11,957 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4707 transitions. [2023-08-30 19:24:11,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4707 transitions. [2023-08-30 19:24:11,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:11,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4707 transitions. [2023-08-30 19:24:11,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 174.33333333333334) internal successors, (4707), 27 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:11,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 412.0) internal successors, (11536), 28 states have internal predecessors, (11536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:11,968 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 412.0) internal successors, (11536), 28 states have internal predecessors, (11536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:11,968 INFO L175 Difference]: Start difference. First operand has 470 places, 964 transitions, 26544 flow. Second operand 27 states and 4707 transitions. [2023-08-30 19:24:11,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1198 transitions, 34181 flow [2023-08-30 19:24:14,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 1198 transitions, 33264 flow, removed 132 selfloop flow, removed 14 redundant places. [2023-08-30 19:24:14,872 INFO L231 Difference]: Finished difference. Result has 485 places, 1027 transitions, 29279 flow [2023-08-30 19:24:14,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=25364, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=29279, PETRI_PLACES=485, PETRI_TRANSITIONS=1027} [2023-08-30 19:24:14,873 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 465 predicate places. [2023-08-30 19:24:14,874 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 1027 transitions, 29279 flow [2023-08-30 19:24:14,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:14,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:14,874 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:14,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-30 19:24:15,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:15,079 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:24:15,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:15,080 INFO L85 PathProgramCache]: Analyzing trace with hash 141695673, now seen corresponding path program 50 times [2023-08-30 19:24:15,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:15,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014322343] [2023-08-30 19:24:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:15,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:15,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:15,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014322343] [2023-08-30 19:24:15,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014322343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:15,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866660062] [2023-08-30 19:24:15,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:24:15,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:15,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:15,164 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:24:15,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-30 19:24:15,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:24:15,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:24:15,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:24:15,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:15,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:15,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866660062] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:15,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:15,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 19:24:15,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599573587] [2023-08-30 19:24:15,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:15,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:24:15,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:15,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:24:15,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:24:15,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:24:15,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1027 transitions, 29279 flow. Second operand has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:15,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:15,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:24:15,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:17,901 INFO L130 PetriNetUnfolder]: 2655/5348 cut-off events. [2023-08-30 19:24:17,902 INFO L131 PetriNetUnfolder]: For 315845/315845 co-relation queries the response was YES. [2023-08-30 19:24:17,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65883 conditions, 5348 events. 2655/5348 cut-off events. For 315845/315845 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 43038 event pairs, 66 based on Foata normal form. 20/5368 useless extension candidates. Maximal degree in co-relation 65710. Up to 1475 conditions per place. [2023-08-30 19:24:17,973 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 632 selfloop transitions, 495 changer transitions 5/1132 dead transitions. [2023-08-30 19:24:17,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 1132 transitions, 33907 flow [2023-08-30 19:24:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 19:24:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 19:24:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4869 transitions. [2023-08-30 19:24:17,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207004160887657 [2023-08-30 19:24:17,976 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4869 transitions. [2023-08-30 19:24:17,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4869 transitions. [2023-08-30 19:24:17,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:17,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4869 transitions. [2023-08-30 19:24:17,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 173.89285714285714) internal successors, (4869), 28 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:17,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 412.0) internal successors, (11948), 29 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:17,985 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 412.0) internal successors, (11948), 29 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:17,985 INFO L175 Difference]: Start difference. First operand has 485 places, 1027 transitions, 29279 flow. Second operand 28 states and 4869 transitions. [2023-08-30 19:24:17,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 1132 transitions, 33907 flow [2023-08-30 19:24:20,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 1132 transitions, 32686 flow, removed 397 selfloop flow, removed 15 redundant places. [2023-08-30 19:24:21,001 INFO L231 Difference]: Finished difference. Result has 499 places, 1044 transitions, 30195 flow [2023-08-30 19:24:21,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=27851, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=30195, PETRI_PLACES=499, PETRI_TRANSITIONS=1044} [2023-08-30 19:24:21,002 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 479 predicate places. [2023-08-30 19:24:21,002 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1044 transitions, 30195 flow [2023-08-30 19:24:21,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:21,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:21,003 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:21,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-30 19:24:21,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:21,208 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:24:21,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:21,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1528904067, now seen corresponding path program 51 times [2023-08-30 19:24:21,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:21,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820177289] [2023-08-30 19:24:21,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:21,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:21,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:21,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820177289] [2023-08-30 19:24:21,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820177289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:21,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670986886] [2023-08-30 19:24:21,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:24:21,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:21,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:21,270 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:24:21,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-30 19:24:21,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 19:24:21,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:24:21,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:24:21,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:21,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:21,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670986886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:21,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:21,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 19:24:21,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730332586] [2023-08-30 19:24:21,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:21,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:24:21,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:21,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:24:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:24:21,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:24:21,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1044 transitions, 30195 flow. Second operand has 15 states, 15 states have (on average 170.86666666666667) internal successors, (2563), 15 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:21,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:21,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:24:21,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:24,288 INFO L130 PetriNetUnfolder]: 2961/5996 cut-off events. [2023-08-30 19:24:24,288 INFO L131 PetriNetUnfolder]: For 380651/380651 co-relation queries the response was YES. [2023-08-30 19:24:24,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75386 conditions, 5996 events. 2961/5996 cut-off events. For 380651/380651 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 49302 event pairs, 550 based on Foata normal form. 36/6032 useless extension candidates. Maximal degree in co-relation 75210. Up to 2610 conditions per place. [2023-08-30 19:24:24,366 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 793 selfloop transitions, 491 changer transitions 1/1285 dead transitions. [2023-08-30 19:24:24,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1285 transitions, 39499 flow [2023-08-30 19:24:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 19:24:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 19:24:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3849 transitions. [2023-08-30 19:24:24,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246469549867608 [2023-08-30 19:24:24,369 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3849 transitions. [2023-08-30 19:24:24,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3849 transitions. [2023-08-30 19:24:24,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:24,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3849 transitions. [2023-08-30 19:24:24,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 174.95454545454547) internal successors, (3849), 22 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:24,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:24,375 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:24,375 INFO L175 Difference]: Start difference. First operand has 499 places, 1044 transitions, 30195 flow. Second operand 22 states and 3849 transitions. [2023-08-30 19:24:24,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1285 transitions, 39499 flow [2023-08-30 19:24:27,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 1285 transitions, 37168 flow, removed 750 selfloop flow, removed 13 redundant places. [2023-08-30 19:24:27,918 INFO L231 Difference]: Finished difference. Result has 513 places, 1128 transitions, 32628 flow [2023-08-30 19:24:27,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=28071, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=32628, PETRI_PLACES=513, PETRI_TRANSITIONS=1128} [2023-08-30 19:24:27,919 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 493 predicate places. [2023-08-30 19:24:27,919 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1128 transitions, 32628 flow [2023-08-30 19:24:27,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.86666666666667) internal successors, (2563), 15 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:27,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:27,920 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:27,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-08-30 19:24:28,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:28,125 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:24:28,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:28,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1593843127, now seen corresponding path program 52 times [2023-08-30 19:24:28,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:28,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105426602] [2023-08-30 19:24:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:28,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:28,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:28,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105426602] [2023-08-30 19:24:28,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105426602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:28,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664928746] [2023-08-30 19:24:28,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:24:28,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:28,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:28,184 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:24:28,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-30 19:24:28,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:24:28,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:24:28,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:24:28,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:28,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:28,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664928746] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:28,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:28,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 19:24:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933548857] [2023-08-30 19:24:28,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:28,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:24:28,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:24:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:24:28,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:24:28,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1128 transitions, 32628 flow. Second operand has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:28,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:28,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:24:28,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:31,854 INFO L130 PetriNetUnfolder]: 2885/5874 cut-off events. [2023-08-30 19:24:31,854 INFO L131 PetriNetUnfolder]: For 355261/355261 co-relation queries the response was YES. [2023-08-30 19:24:31,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73058 conditions, 5874 events. 2885/5874 cut-off events. For 355261/355261 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 48233 event pairs, 326 based on Foata normal form. 64/5938 useless extension candidates. Maximal degree in co-relation 72878. Up to 1686 conditions per place. [2023-08-30 19:24:31,925 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 680 selfloop transitions, 604 changer transitions 12/1296 dead transitions. [2023-08-30 19:24:31,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1296 transitions, 38795 flow [2023-08-30 19:24:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 19:24:31,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 19:24:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5396 transitions. [2023-08-30 19:24:31,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248668963357344 [2023-08-30 19:24:31,928 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5396 transitions. [2023-08-30 19:24:31,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5396 transitions. [2023-08-30 19:24:31,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:31,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5396 transitions. [2023-08-30 19:24:31,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 174.06451612903226) internal successors, (5396), 31 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:31,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:31,937 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:31,937 INFO L175 Difference]: Start difference. First operand has 513 places, 1128 transitions, 32628 flow. Second operand 31 states and 5396 transitions. [2023-08-30 19:24:31,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1296 transitions, 38795 flow [2023-08-30 19:24:35,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1296 transitions, 38048 flow, removed 293 selfloop flow, removed 10 redundant places. [2023-08-30 19:24:35,480 INFO L231 Difference]: Finished difference. Result has 533 places, 1126 transitions, 33730 flow [2023-08-30 19:24:35,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=31261, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=33730, PETRI_PLACES=533, PETRI_TRANSITIONS=1126} [2023-08-30 19:24:35,481 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 513 predicate places. [2023-08-30 19:24:35,481 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 1126 transitions, 33730 flow [2023-08-30 19:24:35,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:35,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:35,482 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:35,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-30 19:24:35,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-08-30 19:24:35,687 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:24:35,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash 578571649, now seen corresponding path program 53 times [2023-08-30 19:24:35,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:35,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104622562] [2023-08-30 19:24:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:35,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:35,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:35,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104622562] [2023-08-30 19:24:35,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104622562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:35,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146142113] [2023-08-30 19:24:35,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:24:35,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:35,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:35,755 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:24:35,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-30 19:24:35,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:24:35,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:24:35,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:24:35,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:35,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:35,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146142113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:35,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:35,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-30 19:24:35,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610702896] [2023-08-30 19:24:35,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:35,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:24:35,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:35,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:24:35,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:24:36,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:24:36,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 1126 transitions, 33730 flow. Second operand has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:36,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:36,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:24:36,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:39,507 INFO L130 PetriNetUnfolder]: 3350/6697 cut-off events. [2023-08-30 19:24:39,508 INFO L131 PetriNetUnfolder]: For 413277/413277 co-relation queries the response was YES. [2023-08-30 19:24:39,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85488 conditions, 6697 events. 3350/6697 cut-off events. For 413277/413277 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 55449 event pairs, 288 based on Foata normal form. 78/6775 useless extension candidates. Maximal degree in co-relation 85306. Up to 5716 conditions per place. [2023-08-30 19:24:39,600 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1144 selfloop transitions, 226 changer transitions 0/1370 dead transitions. [2023-08-30 19:24:39,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1370 transitions, 42462 flow [2023-08-30 19:24:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 19:24:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 19:24:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3512 transitions. [2023-08-30 19:24:39,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262135922330097 [2023-08-30 19:24:39,603 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3512 transitions. [2023-08-30 19:24:39,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3512 transitions. [2023-08-30 19:24:39,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:39,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3512 transitions. [2023-08-30 19:24:39,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 175.6) internal successors, (3512), 20 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:39,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:39,610 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:39,610 INFO L175 Difference]: Start difference. First operand has 533 places, 1126 transitions, 33730 flow. Second operand 20 states and 3512 transitions. [2023-08-30 19:24:39,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1370 transitions, 42462 flow [2023-08-30 19:24:44,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1370 transitions, 41117 flow, removed 337 selfloop flow, removed 20 redundant places. [2023-08-30 19:24:44,333 INFO L231 Difference]: Finished difference. Result has 540 places, 1281 transitions, 37880 flow [2023-08-30 19:24:44,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=32406, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=37880, PETRI_PLACES=540, PETRI_TRANSITIONS=1281} [2023-08-30 19:24:44,336 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 520 predicate places. [2023-08-30 19:24:44,336 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 1281 transitions, 37880 flow [2023-08-30 19:24:44,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:44,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:44,337 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:44,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-30 19:24:44,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-08-30 19:24:44,542 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:24:44,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:44,553 INFO L85 PathProgramCache]: Analyzing trace with hash 240245433, now seen corresponding path program 54 times [2023-08-30 19:24:44,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:44,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896528373] [2023-08-30 19:24:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:44,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:44,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:44,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896528373] [2023-08-30 19:24:44,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896528373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:44,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966639844] [2023-08-30 19:24:44,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:24:44,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:44,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:44,611 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:24:44,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-30 19:24:44,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 19:24:44,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:24:44,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:24:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:44,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:44,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966639844] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:44,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:44,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-08-30 19:24:44,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913658319] [2023-08-30 19:24:44,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:44,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:24:44,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:24:44,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:24:44,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:24:44,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1281 transitions, 37880 flow. Second operand has 15 states, 15 states have (on average 170.86666666666667) internal successors, (2563), 15 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:44,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:44,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:24:44,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:49,423 INFO L130 PetriNetUnfolder]: 3832/7695 cut-off events. [2023-08-30 19:24:49,423 INFO L131 PetriNetUnfolder]: For 499496/499496 co-relation queries the response was YES. [2023-08-30 19:24:49,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99848 conditions, 7695 events. 3832/7695 cut-off events. For 499496/499496 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 65821 event pairs, 166 based on Foata normal form. 166/7861 useless extension candidates. Maximal degree in co-relation 99656. Up to 3135 conditions per place. [2023-08-30 19:24:49,536 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 879 selfloop transitions, 676 changer transitions 1/1556 dead transitions. [2023-08-30 19:24:49,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 1556 transitions, 49153 flow [2023-08-30 19:24:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 19:24:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 19:24:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4032 transitions. [2023-08-30 19:24:49,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254959898691431 [2023-08-30 19:24:49,539 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4032 transitions. [2023-08-30 19:24:49,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4032 transitions. [2023-08-30 19:24:49,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:49,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4032 transitions. [2023-08-30 19:24:49,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 175.30434782608697) internal successors, (4032), 23 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:49,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:49,546 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:49,546 INFO L175 Difference]: Start difference. First operand has 540 places, 1281 transitions, 37880 flow. Second operand 23 states and 4032 transitions. [2023-08-30 19:24:49,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 1556 transitions, 49153 flow [2023-08-30 19:24:55,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1556 transitions, 48246 flow, removed 318 selfloop flow, removed 7 redundant places. [2023-08-30 19:24:55,274 INFO L231 Difference]: Finished difference. Result has 560 places, 1416 transitions, 44202 flow [2023-08-30 19:24:55,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=36719, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=44202, PETRI_PLACES=560, PETRI_TRANSITIONS=1416} [2023-08-30 19:24:55,275 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 540 predicate places. [2023-08-30 19:24:55,275 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 1416 transitions, 44202 flow [2023-08-30 19:24:55,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.86666666666667) internal successors, (2563), 15 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:55,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:55,276 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:55,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-30 19:24:55,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:55,481 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:24:55,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:55,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1169476999, now seen corresponding path program 55 times [2023-08-30 19:24:55,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:55,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410902389] [2023-08-30 19:24:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:55,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:55,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:55,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410902389] [2023-08-30 19:24:55,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410902389] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:55,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137748773] [2023-08-30 19:24:55,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:24:55,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:55,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:55,547 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:24:55,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-30 19:24:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:55,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:24:55,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:55,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:55,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137748773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:55,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:55,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 19:24:55,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081261151] [2023-08-30 19:24:55,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:55,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:24:55,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:55,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:24:55,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:24:55,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:24:55,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 1416 transitions, 44202 flow. Second operand has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:24:55,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:55,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:24:55,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:00,422 INFO L130 PetriNetUnfolder]: 3871/7710 cut-off events. [2023-08-30 19:25:00,422 INFO L131 PetriNetUnfolder]: For 531496/531496 co-relation queries the response was YES. [2023-08-30 19:25:00,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103760 conditions, 7710 events. 3871/7710 cut-off events. For 531496/531496 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 65452 event pairs, 158 based on Foata normal form. 50/7760 useless extension candidates. Maximal degree in co-relation 103564. Up to 2496 conditions per place. [2023-08-30 19:25:00,551 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 739 selfloop transitions, 795 changer transitions 15/1549 dead transitions. [2023-08-30 19:25:00,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1549 transitions, 50834 flow [2023-08-30 19:25:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 19:25:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 19:25:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5380 transitions. [2023-08-30 19:25:00,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42123394926401503 [2023-08-30 19:25:00,555 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5380 transitions. [2023-08-30 19:25:00,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5380 transitions. [2023-08-30 19:25:00,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:00,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5380 transitions. [2023-08-30 19:25:00,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 173.5483870967742) internal successors, (5380), 31 states have internal predecessors, (5380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:00,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:00,568 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:00,568 INFO L175 Difference]: Start difference. First operand has 560 places, 1416 transitions, 44202 flow. Second operand 31 states and 5380 transitions. [2023-08-30 19:25:00,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1549 transitions, 50834 flow [2023-08-30 19:25:07,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1549 transitions, 49512 flow, removed 413 selfloop flow, removed 16 redundant places. [2023-08-30 19:25:07,400 INFO L231 Difference]: Finished difference. Result has 580 places, 1443 transitions, 46817 flow [2023-08-30 19:25:07,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=42222, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=46817, PETRI_PLACES=580, PETRI_TRANSITIONS=1443} [2023-08-30 19:25:07,401 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 560 predicate places. [2023-08-30 19:25:07,401 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1443 transitions, 46817 flow [2023-08-30 19:25:07,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:07,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:07,402 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:07,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-30 19:25:07,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:07,607 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:25:07,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:07,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1133843129, now seen corresponding path program 56 times [2023-08-30 19:25:07,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:07,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110117016] [2023-08-30 19:25:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:07,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:07,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:07,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110117016] [2023-08-30 19:25:07,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110117016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:07,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250392753] [2023-08-30 19:25:07,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:25:07,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:07,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:07,673 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:25:07,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-30 19:25:07,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:25:07,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:25:07,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:25:07,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:07,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:07,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250392753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:07,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:07,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-30 19:25:07,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112122227] [2023-08-30 19:25:07,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:07,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:25:07,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:07,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:25:07,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:25:07,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:25:07,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1443 transitions, 46817 flow. Second operand has 20 states, 20 states have (on average 170.55) internal successors, (3411), 20 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:07,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:07,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:25:07,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:13,080 INFO L130 PetriNetUnfolder]: 4126/8265 cut-off events. [2023-08-30 19:25:13,080 INFO L131 PetriNetUnfolder]: For 609088/609088 co-relation queries the response was YES. [2023-08-30 19:25:13,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114945 conditions, 8265 events. 4126/8265 cut-off events. For 609088/609088 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 71258 event pairs, 180 based on Foata normal form. 40/8305 useless extension candidates. Maximal degree in co-relation 114748. Up to 2325 conditions per place. [2023-08-30 19:25:13,217 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 712 selfloop transitions, 916 changer transitions 20/1648 dead transitions. [2023-08-30 19:25:13,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 1648 transitions, 56577 flow [2023-08-30 19:25:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 19:25:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 19:25:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5902 transitions. [2023-08-30 19:25:13,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42133066818960596 [2023-08-30 19:25:13,220 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5902 transitions. [2023-08-30 19:25:13,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5902 transitions. [2023-08-30 19:25:13,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:13,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5902 transitions. [2023-08-30 19:25:13,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 173.58823529411765) internal successors, (5902), 34 states have internal predecessors, (5902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:13,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:13,231 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:13,231 INFO L175 Difference]: Start difference. First operand has 580 places, 1443 transitions, 46817 flow. Second operand 34 states and 5902 transitions. [2023-08-30 19:25:13,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 1648 transitions, 56577 flow [2023-08-30 19:25:22,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1648 transitions, 55166 flow, removed 592 selfloop flow, removed 14 redundant places. [2023-08-30 19:25:22,435 INFO L231 Difference]: Finished difference. Result has 604 places, 1531 transitions, 52715 flow [2023-08-30 19:25:22,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=45212, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=829, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=52715, PETRI_PLACES=604, PETRI_TRANSITIONS=1531} [2023-08-30 19:25:22,437 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 584 predicate places. [2023-08-30 19:25:22,437 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1531 transitions, 52715 flow [2023-08-30 19:25:22,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 170.55) internal successors, (3411), 20 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:22,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:22,438 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:22,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-30 19:25:22,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-30 19:25:22,643 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:25:22,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1710707121, now seen corresponding path program 57 times [2023-08-30 19:25:22,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:22,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2922947] [2023-08-30 19:25:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:22,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:22,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:22,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2922947] [2023-08-30 19:25:22,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2922947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:22,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779188610] [2023-08-30 19:25:22,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:25:22,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:22,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:22,704 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:25:22,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-30 19:25:22,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 19:25:22,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:25:22,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:25:22,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:22,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:22,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779188610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:22,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:22,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-30 19:25:22,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601797736] [2023-08-30 19:25:22,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:22,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:25:22,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:22,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:25:22,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:25:22,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:25:22,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1531 transitions, 52715 flow. Second operand has 17 states, 17 states have (on average 170.94117647058823) internal successors, (2906), 17 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:22,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:22,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:25:22,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:29,647 INFO L130 PetriNetUnfolder]: 4921/9910 cut-off events. [2023-08-30 19:25:29,647 INFO L131 PetriNetUnfolder]: For 806267/806267 co-relation queries the response was YES. [2023-08-30 19:25:29,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143672 conditions, 9910 events. 4921/9910 cut-off events. For 806267/806267 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 88796 event pairs, 210 based on Foata normal form. 42/9952 useless extension candidates. Maximal degree in co-relation 143470. Up to 3017 conditions per place. [2023-08-30 19:25:29,791 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 946 selfloop transitions, 984 changer transitions 0/1930 dead transitions. [2023-08-30 19:25:29,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1930 transitions, 70216 flow [2023-08-30 19:25:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 19:25:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 19:25:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4208 transitions. [2023-08-30 19:25:29,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255663430420712 [2023-08-30 19:25:29,794 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4208 transitions. [2023-08-30 19:25:29,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4208 transitions. [2023-08-30 19:25:29,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:29,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4208 transitions. [2023-08-30 19:25:29,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 175.33333333333334) internal successors, (4208), 24 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:29,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:29,801 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:29,801 INFO L175 Difference]: Start difference. First operand has 604 places, 1531 transitions, 52715 flow. Second operand 24 states and 4208 transitions. [2023-08-30 19:25:29,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1930 transitions, 70216 flow [2023-08-30 19:25:42,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 1930 transitions, 68114 flow, removed 886 selfloop flow, removed 14 redundant places. [2023-08-30 19:25:42,578 INFO L231 Difference]: Finished difference. Result has 614 places, 1764 transitions, 63542 flow [2023-08-30 19:25:42,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=50405, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=63542, PETRI_PLACES=614, PETRI_TRANSITIONS=1764} [2023-08-30 19:25:42,579 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 594 predicate places. [2023-08-30 19:25:42,579 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 1764 transitions, 63542 flow [2023-08-30 19:25:42,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.94117647058823) internal successors, (2906), 17 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:42,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:42,580 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:42,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-30 19:25:42,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-30 19:25:42,780 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:25:42,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:42,780 INFO L85 PathProgramCache]: Analyzing trace with hash 695910137, now seen corresponding path program 58 times [2023-08-30 19:25:42,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:42,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181958888] [2023-08-30 19:25:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:42,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:42,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181958888] [2023-08-30 19:25:42,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181958888] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:42,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287710258] [2023-08-30 19:25:42,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:25:42,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:42,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:42,898 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:25:42,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-30 19:25:43,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:25:43,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:25:43,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:25:43,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:43,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:43,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287710258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:43,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:43,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-30 19:25:43,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851561559] [2023-08-30 19:25:43,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:43,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:25:43,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:43,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:25:43,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:25:43,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:25:43,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 1764 transitions, 63542 flow. Second operand has 14 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:43,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:43,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:25:43,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:50,536 INFO L130 PetriNetUnfolder]: 5132/10371 cut-off events. [2023-08-30 19:25:50,537 INFO L131 PetriNetUnfolder]: For 847197/847197 co-relation queries the response was YES. [2023-08-30 19:25:50,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151560 conditions, 10371 events. 5132/10371 cut-off events. For 847197/847197 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 93994 event pairs, 866 based on Foata normal form. 2/10373 useless extension candidates. Maximal degree in co-relation 151352. Up to 5072 conditions per place. [2023-08-30 19:25:50,689 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1206 selfloop transitions, 681 changer transitions 7/1894 dead transitions. [2023-08-30 19:25:50,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 1894 transitions, 70985 flow [2023-08-30 19:25:50,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:25:50,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:25:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2431 transitions. [2023-08-30 19:25:50,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214632454923717 [2023-08-30 19:25:50,691 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2431 transitions. [2023-08-30 19:25:50,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2431 transitions. [2023-08-30 19:25:50,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:50,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2431 transitions. [2023-08-30 19:25:50,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 173.64285714285714) internal successors, (2431), 14 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:50,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:50,695 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:50,695 INFO L175 Difference]: Start difference. First operand has 614 places, 1764 transitions, 63542 flow. Second operand 14 states and 2431 transitions. [2023-08-30 19:25:50,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 1894 transitions, 70985 flow [2023-08-30 19:26:04,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1894 transitions, 69549 flow, removed 603 selfloop flow, removed 12 redundant places. [2023-08-30 19:26:04,420 INFO L231 Difference]: Finished difference. Result has 621 places, 1839 transitions, 66647 flow [2023-08-30 19:26:04,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=62147, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=66647, PETRI_PLACES=621, PETRI_TRANSITIONS=1839} [2023-08-30 19:26:04,421 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 601 predicate places. [2023-08-30 19:26:04,422 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 1839 transitions, 66647 flow [2023-08-30 19:26:04,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:26:04,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:26:04,422 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:26:04,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-08-30 19:26:04,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:26:04,627 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:26:04,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:26:04,627 INFO L85 PathProgramCache]: Analyzing trace with hash 644662819, now seen corresponding path program 59 times [2023-08-30 19:26:04,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:26:04,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844269394] [2023-08-30 19:26:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:26:04,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:26:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:26:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:26:04,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:26:04,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844269394] [2023-08-30 19:26:04,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844269394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:26:04,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127819812] [2023-08-30 19:26:04,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:26:04,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:26:04,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:26:04,688 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:26:04,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-30 19:26:04,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:26:04,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:26:04,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:26:04,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:26:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:26:04,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:26:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:26:04,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127819812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:26:04,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:26:04,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-30 19:26:04,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776163241] [2023-08-30 19:26:04,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:26:04,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:26:04,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:26:04,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:26:04,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:26:04,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:26:04,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1839 transitions, 66647 flow. Second operand has 14 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:26:04,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:26:04,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:26:04,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:26:12,946 INFO L130 PetriNetUnfolder]: 5258/10573 cut-off events. [2023-08-30 19:26:12,946 INFO L131 PetriNetUnfolder]: For 821197/821197 co-relation queries the response was YES. [2023-08-30 19:26:13,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154480 conditions, 10573 events. 5258/10573 cut-off events. For 821197/821197 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 95639 event pairs, 221 based on Foata normal form. 30/10603 useless extension candidates. Maximal degree in co-relation 154268. Up to 7874 conditions per place. [2023-08-30 19:26:13,103 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 1433 selfloop transitions, 517 changer transitions 0/1950 dead transitions. [2023-08-30 19:26:13,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1950 transitions, 73556 flow [2023-08-30 19:26:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:26:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:26:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1579 transitions. [2023-08-30 19:26:13,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42583603020496225 [2023-08-30 19:26:13,105 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1579 transitions. [2023-08-30 19:26:13,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1579 transitions. [2023-08-30 19:26:13,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:26:13,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1579 transitions. [2023-08-30 19:26:13,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:26:13,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:26:13,108 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:26:13,108 INFO L175 Difference]: Start difference. First operand has 621 places, 1839 transitions, 66647 flow. Second operand 9 states and 1579 transitions. [2023-08-30 19:26:13,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1950 transitions, 73556 flow [2023-08-30 19:26:27,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1950 transitions, 72812 flow, removed 121 selfloop flow, removed 9 redundant places. [2023-08-30 19:26:27,607 INFO L231 Difference]: Finished difference. Result has 621 places, 1888 transitions, 68972 flow [2023-08-30 19:26:27,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=65904, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=68972, PETRI_PLACES=621, PETRI_TRANSITIONS=1888} [2023-08-30 19:26:27,608 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 601 predicate places. [2023-08-30 19:26:27,608 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 1888 transitions, 68972 flow [2023-08-30 19:26:27,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:26:27,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:26:27,609 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:26:27,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-30 19:26:27,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-30 19:26:27,813 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:26:27,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:26:27,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2004137547, now seen corresponding path program 60 times [2023-08-30 19:26:27,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:26:27,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442239287] [2023-08-30 19:26:27,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:26:27,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:26:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:26:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:26:27,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:26:27,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442239287] [2023-08-30 19:26:27,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442239287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:26:27,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352693395] [2023-08-30 19:26:27,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:26:27,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:26:27,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:26:27,875 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:26:27,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-30 19:26:27,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:26:27,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:26:27,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:26:27,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:26:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:26:28,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:26:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:26:28,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352693395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:26:28,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:26:28,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2023-08-30 19:26:28,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573062200] [2023-08-30 19:26:28,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:26:28,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:26:28,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:26:28,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:26:28,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:26:28,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:26:28,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1888 transitions, 68972 flow. Second operand has 16 states, 16 states have (on average 170.8125) internal successors, (2733), 16 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:26:28,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:26:28,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:26:28,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:26:36,580 INFO L130 PetriNetUnfolder]: 5548/11175 cut-off events. [2023-08-30 19:26:36,581 INFO L131 PetriNetUnfolder]: For 880610/880610 co-relation queries the response was YES. [2023-08-30 19:26:36,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164192 conditions, 11175 events. 5548/11175 cut-off events. For 880610/880610 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 102302 event pairs, 795 based on Foata normal form. 16/11191 useless extension candidates. Maximal degree in co-relation 163980. Up to 3253 conditions per place. [2023-08-30 19:26:36,856 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1261 selfloop transitions, 825 changer transitions 10/2096 dead transitions. [2023-08-30 19:26:36,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 2096 transitions, 78971 flow [2023-08-30 19:26:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 19:26:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 19:26:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4177 transitions. [2023-08-30 19:26:36,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42243122977346276 [2023-08-30 19:26:36,859 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4177 transitions. [2023-08-30 19:26:36,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4177 transitions. [2023-08-30 19:26:36,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:26:36,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4177 transitions. [2023-08-30 19:26:36,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 174.04166666666666) internal successors, (4177), 24 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:26:36,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:26:36,866 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:26:36,866 INFO L175 Difference]: Start difference. First operand has 621 places, 1888 transitions, 68972 flow. Second operand 24 states and 4177 transitions. [2023-08-30 19:26:36,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 2096 transitions, 78971 flow [2023-08-30 19:26:52,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 2096 transitions, 78314 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-30 19:26:52,984 INFO L231 Difference]: Finished difference. Result has 648 places, 1982 transitions, 74899 flow [2023-08-30 19:26:52,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=68185, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=721, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1090, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=74899, PETRI_PLACES=648, PETRI_TRANSITIONS=1982} [2023-08-30 19:26:52,986 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 628 predicate places. [2023-08-30 19:26:52,986 INFO L495 AbstractCegarLoop]: Abstraction has has 648 places, 1982 transitions, 74899 flow [2023-08-30 19:26:52,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.8125) internal successors, (2733), 16 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:26:52,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:26:52,986 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:26:52,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-08-30 19:26:53,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:26:53,189 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:26:53,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:26:53,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2099469555, now seen corresponding path program 61 times [2023-08-30 19:26:53,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:26:53,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756645691] [2023-08-30 19:26:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:26:53,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:26:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:26:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:26:53,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:26:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756645691] [2023-08-30 19:26:53,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756645691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:26:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024379194] [2023-08-30 19:26:53,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:26:53,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:26:53,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:26:53,251 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:26:53,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-30 19:26:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:26:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:26:53,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:26:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:26:53,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:26:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:26:53,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024379194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:26:53,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:26:53,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-30 19:26:53,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360684068] [2023-08-30 19:26:53,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:26:53,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:26:53,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:26:53,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:26:53,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:26:53,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:26:53,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 1982 transitions, 74899 flow. Second operand has 18 states, 18 states have (on average 170.66666666666666) internal successors, (3072), 18 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:26:53,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:26:53,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:26:53,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:02,716 INFO L130 PetriNetUnfolder]: 5625/11332 cut-off events. [2023-08-30 19:27:02,716 INFO L131 PetriNetUnfolder]: For 987381/987381 co-relation queries the response was YES. [2023-08-30 19:27:02,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172202 conditions, 11332 events. 5625/11332 cut-off events. For 987381/987381 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 103934 event pairs, 833 based on Foata normal form. 8/11340 useless extension candidates. Maximal degree in co-relation 171982. Up to 3527 conditions per place. [2023-08-30 19:27:02,894 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1284 selfloop transitions, 835 changer transitions 8/2127 dead transitions. [2023-08-30 19:27:02,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 2127 transitions, 83076 flow [2023-08-30 19:27:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 19:27:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 19:27:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5554 transitions. [2023-08-30 19:27:02,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212682038834951 [2023-08-30 19:27:02,897 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5554 transitions. [2023-08-30 19:27:02,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5554 transitions. [2023-08-30 19:27:02,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:02,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5554 transitions. [2023-08-30 19:27:02,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 173.5625) internal successors, (5554), 32 states have internal predecessors, (5554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:03,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:03,003 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:03,003 INFO L175 Difference]: Start difference. First operand has 648 places, 1982 transitions, 74899 flow. Second operand 32 states and 5554 transitions. [2023-08-30 19:27:03,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 2127 transitions, 83076 flow [2023-08-30 19:27:22,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 2127 transitions, 81458 flow, removed 723 selfloop flow, removed 10 redundant places. [2023-08-30 19:27:22,769 INFO L231 Difference]: Finished difference. Result has 676 places, 2029 transitions, 78721 flow [2023-08-30 19:27:22,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=73772, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=782, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=78721, PETRI_PLACES=676, PETRI_TRANSITIONS=2029} [2023-08-30 19:27:22,770 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 656 predicate places. [2023-08-30 19:27:22,771 INFO L495 AbstractCegarLoop]: Abstraction has has 676 places, 2029 transitions, 78721 flow [2023-08-30 19:27:22,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 170.66666666666666) internal successors, (3072), 18 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:22,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:22,771 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:22,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-08-30 19:27:22,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:22,976 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:27:22,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:22,976 INFO L85 PathProgramCache]: Analyzing trace with hash -265543753, now seen corresponding path program 62 times [2023-08-30 19:27:22,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:22,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609950844] [2023-08-30 19:27:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:22,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:27:23,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:23,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609950844] [2023-08-30 19:27:23,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609950844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:23,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023590051] [2023-08-30 19:27:23,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:27:23,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:23,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:23,036 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:27:23,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-30 19:27:23,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:27:23,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:23,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:27:23,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:23,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 19:27:23,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023590051] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:23,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:23,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 15 [2023-08-30 19:27:23,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052492781] [2023-08-30 19:27:23,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:23,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:27:23,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:23,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:27:23,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:27:23,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:27:23,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 2029 transitions, 78721 flow. Second operand has 15 states, 15 states have (on average 171.0) internal successors, (2565), 15 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:23,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:23,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:27:23,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:32,608 INFO L130 PetriNetUnfolder]: 5655/11394 cut-off events. [2023-08-30 19:27:32,608 INFO L131 PetriNetUnfolder]: For 1054436/1054436 co-relation queries the response was YES. [2023-08-30 19:27:32,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176386 conditions, 11394 events. 5655/11394 cut-off events. For 1054436/1054436 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 104754 event pairs, 2166 based on Foata normal form. 62/11456 useless extension candidates. Maximal degree in co-relation 176160. Up to 10806 conditions per place. [2023-08-30 19:27:32,787 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1979 selfloop transitions, 118 changer transitions 2/2099 dead transitions. [2023-08-30 19:27:32,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 2099 transitions, 84431 flow [2023-08-30 19:27:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 19:27:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 19:27:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2803 transitions. [2023-08-30 19:27:32,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252123786407767 [2023-08-30 19:27:32,790 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2803 transitions. [2023-08-30 19:27:32,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2803 transitions. [2023-08-30 19:27:32,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:32,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2803 transitions. [2023-08-30 19:27:32,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 175.1875) internal successors, (2803), 16 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:32,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:32,795 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:32,795 INFO L175 Difference]: Start difference. First operand has 676 places, 2029 transitions, 78721 flow. Second operand 16 states and 2803 transitions. [2023-08-30 19:27:32,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 2099 transitions, 84431 flow [2023-08-30 19:27:53,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 2099 transitions, 82952 flow, removed 499 selfloop flow, removed 16 redundant places. [2023-08-30 19:27:53,911 INFO L231 Difference]: Finished difference. Result has 678 places, 2036 transitions, 77993 flow [2023-08-30 19:27:53,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=77045, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1899, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=77993, PETRI_PLACES=678, PETRI_TRANSITIONS=2036} [2023-08-30 19:27:53,913 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 658 predicate places. [2023-08-30 19:27:53,913 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 2036 transitions, 77993 flow [2023-08-30 19:27:53,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 171.0) internal successors, (2565), 15 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:53,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:53,913 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:53,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-08-30 19:27:54,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-08-30 19:27:54,118 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:27:54,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:54,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1180036555, now seen corresponding path program 63 times [2023-08-30 19:27:54,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:54,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685031770] [2023-08-30 19:27:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:54,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:54,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:54,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685031770] [2023-08-30 19:27:54,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685031770] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:54,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266805079] [2023-08-30 19:27:54,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:27:54,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:54,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:54,186 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:27:54,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-30 19:27:54,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:27:54,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:54,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:27:54,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:54,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:54,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266805079] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:54,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:54,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-08-30 19:27:54,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548368731] [2023-08-30 19:27:54,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:54,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:27:54,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:54,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:27:54,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:27:54,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:27:54,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 2036 transitions, 77993 flow. Second operand has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:54,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:54,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:27:54,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:28:03,873 INFO L130 PetriNetUnfolder]: 5740/11503 cut-off events. [2023-08-30 19:28:03,873 INFO L131 PetriNetUnfolder]: For 1078291/1078291 co-relation queries the response was YES. [2023-08-30 19:28:04,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178113 conditions, 11503 events. 5740/11503 cut-off events. For 1078291/1078291 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 105191 event pairs, 511 based on Foata normal form. 86/11589 useless extension candidates. Maximal degree in co-relation 177882. Up to 9927 conditions per place. [2023-08-30 19:28:04,060 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1806 selfloop transitions, 360 changer transitions 2/2168 dead transitions. [2023-08-30 19:28:04,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 2168 transitions, 86315 flow [2023-08-30 19:28:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 19:28:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 19:28:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3659 transitions. [2023-08-30 19:28:04,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229079981507166 [2023-08-30 19:28:04,062 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3659 transitions. [2023-08-30 19:28:04,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3659 transitions. [2023-08-30 19:28:04,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:28:04,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3659 transitions. [2023-08-30 19:28:04,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 174.23809523809524) internal successors, (3659), 21 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:04,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:04,069 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:04,069 INFO L175 Difference]: Start difference. First operand has 678 places, 2036 transitions, 77993 flow. Second operand 21 states and 3659 transitions. [2023-08-30 19:28:04,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 2168 transitions, 86315 flow [2023-08-30 19:28:26,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 2168 transitions, 86022 flow, removed 93 selfloop flow, removed 5 redundant places. [2023-08-30 19:28:26,270 INFO L231 Difference]: Finished difference. Result has 699 places, 2087 transitions, 80552 flow [2023-08-30 19:28:26,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=77216, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=80552, PETRI_PLACES=699, PETRI_TRANSITIONS=2087} [2023-08-30 19:28:26,272 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 679 predicate places. [2023-08-30 19:28:26,272 INFO L495 AbstractCegarLoop]: Abstraction has has 699 places, 2087 transitions, 80552 flow [2023-08-30 19:28:26,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:26,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:28:26,273 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:28:26,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-08-30 19:28:26,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:28:26,475 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:28:26,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:28:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash -458574299, now seen corresponding path program 64 times [2023-08-30 19:28:26,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:28:26,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683569357] [2023-08-30 19:28:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:28:26,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:28:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:28:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:28:26,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:28:26,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683569357] [2023-08-30 19:28:26,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683569357] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:28:26,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050678999] [2023-08-30 19:28:26,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:28:26,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:28:26,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:28:26,534 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:28:26,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-30 19:28:26,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:28:26,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:28:26,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:28:26,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:28:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:28:26,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:28:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:28:26,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050678999] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:28:26,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:28:26,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 19:28:26,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464759986] [2023-08-30 19:28:26,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:28:26,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:28:26,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:28:26,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:28:26,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:28:26,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:28:26,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 2087 transitions, 80552 flow. Second operand has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:26,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:28:26,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:28:26,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:28:37,483 INFO L130 PetriNetUnfolder]: 5736/11503 cut-off events. [2023-08-30 19:28:37,484 INFO L131 PetriNetUnfolder]: For 1065756/1065756 co-relation queries the response was YES. [2023-08-30 19:28:37,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179587 conditions, 11503 events. 5736/11503 cut-off events. For 1065756/1065756 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 105621 event pairs, 828 based on Foata normal form. 4/11507 useless extension candidates. Maximal degree in co-relation 179350. Up to 3646 conditions per place. [2023-08-30 19:28:37,686 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1267 selfloop transitions, 893 changer transitions 4/2164 dead transitions. [2023-08-30 19:28:37,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 2164 transitions, 86025 flow [2023-08-30 19:28:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 19:28:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 19:28:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4514 transitions. [2023-08-30 19:28:37,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213965646004481 [2023-08-30 19:28:37,689 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4514 transitions. [2023-08-30 19:28:37,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4514 transitions. [2023-08-30 19:28:37,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:28:37,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4514 transitions. [2023-08-30 19:28:37,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 173.6153846153846) internal successors, (4514), 26 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:37,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:37,697 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:37,697 INFO L175 Difference]: Start difference. First operand has 699 places, 2087 transitions, 80552 flow. Second operand 26 states and 4514 transitions. [2023-08-30 19:28:37,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 2164 transitions, 86025 flow [2023-08-30 19:29:00,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 2164 transitions, 85344 flow, removed 287 selfloop flow, removed 10 redundant places. [2023-08-30 19:29:00,395 INFO L231 Difference]: Finished difference. Result has 717 places, 2087 transitions, 81886 flow [2023-08-30 19:29:00,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=79851, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2086, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=81886, PETRI_PLACES=717, PETRI_TRANSITIONS=2087} [2023-08-30 19:29:00,397 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 697 predicate places. [2023-08-30 19:29:00,397 INFO L495 AbstractCegarLoop]: Abstraction has has 717 places, 2087 transitions, 81886 flow [2023-08-30 19:29:00,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:00,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:29:00,398 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:29:00,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-08-30 19:29:00,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:29:00,602 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:29:00,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:29:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash 546172837, now seen corresponding path program 65 times [2023-08-30 19:29:00,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:29:00,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117616522] [2023-08-30 19:29:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:29:00,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:29:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:29:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:29:00,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:29:00,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117616522] [2023-08-30 19:29:00,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117616522] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:29:00,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782327759] [2023-08-30 19:29:00,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:29:00,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:29:00,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:29:00,665 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:29:00,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-30 19:29:00,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:29:00,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:29:00,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:29:00,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:29:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:29:00,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:29:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:29:00,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782327759] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:29:00,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:29:00,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-30 19:29:00,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671277389] [2023-08-30 19:29:00,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:29:00,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:29:00,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:29:00,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:29:00,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:29:00,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:29:00,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 717 places, 2087 transitions, 81886 flow. Second operand has 17 states, 17 states have (on average 170.76470588235293) internal successors, (2903), 17 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:00,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:29:00,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:29:00,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:29:12,065 INFO L130 PetriNetUnfolder]: 6210/12485 cut-off events. [2023-08-30 19:29:12,065 INFO L131 PetriNetUnfolder]: For 1273021/1273021 co-relation queries the response was YES. [2023-08-30 19:29:12,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199106 conditions, 12485 events. 6210/12485 cut-off events. For 1273021/1273021 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 116022 event pairs, 971 based on Foata normal form. 28/12513 useless extension candidates. Maximal degree in co-relation 198866. Up to 3941 conditions per place. [2023-08-30 19:29:12,279 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1474 selfloop transitions, 894 changer transitions 6/2374 dead transitions. [2023-08-30 19:29:12,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 2374 transitions, 95973 flow [2023-08-30 19:29:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 19:29:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 19:29:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4521 transitions. [2023-08-30 19:29:12,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220500373412995 [2023-08-30 19:29:12,282 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4521 transitions. [2023-08-30 19:29:12,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4521 transitions. [2023-08-30 19:29:12,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:29:12,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4521 transitions. [2023-08-30 19:29:12,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 173.8846153846154) internal successors, (4521), 26 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:12,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:12,290 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:12,290 INFO L175 Difference]: Start difference. First operand has 717 places, 2087 transitions, 81886 flow. Second operand 26 states and 4521 transitions. [2023-08-30 19:29:12,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 2374 transitions, 95973 flow [2023-08-30 19:29:38,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 2374 transitions, 94145 flow, removed 146 selfloop flow, removed 14 redundant places. [2023-08-30 19:29:38,925 INFO L231 Difference]: Finished difference. Result has 737 places, 2251 transitions, 90446 flow [2023-08-30 19:29:38,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=79884, PETRI_DIFFERENCE_MINUEND_PLACES=702, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=90446, PETRI_PLACES=737, PETRI_TRANSITIONS=2251} [2023-08-30 19:29:38,927 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 717 predicate places. [2023-08-30 19:29:38,927 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 2251 transitions, 90446 flow [2023-08-30 19:29:38,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.76470588235293) internal successors, (2903), 17 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:38,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:29:38,928 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:29:38,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-08-30 19:29:39,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:29:39,132 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:29:39,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:29:39,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1998320291, now seen corresponding path program 66 times [2023-08-30 19:29:39,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:29:39,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694499473] [2023-08-30 19:29:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:29:39,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:29:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:29:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:29:39,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:29:39,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694499473] [2023-08-30 19:29:39,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694499473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:29:39,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092083982] [2023-08-30 19:29:39,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:29:39,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:29:39,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:29:39,198 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:29:39,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-30 19:29:39,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 19:29:39,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:29:39,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:29:39,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:29:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:29:39,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:29:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:29:39,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092083982] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:29:39,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:29:39,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-30 19:29:39,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870428347] [2023-08-30 19:29:39,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:29:39,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:29:39,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:29:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:29:39,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:29:39,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:29:39,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 2251 transitions, 90446 flow. Second operand has 17 states, 17 states have (on average 170.88235294117646) internal successors, (2905), 17 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:39,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:29:39,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:29:39,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:29:51,775 INFO L130 PetriNetUnfolder]: 6506/13103 cut-off events. [2023-08-30 19:29:51,775 INFO L131 PetriNetUnfolder]: For 1484422/1484422 co-relation queries the response was YES. [2023-08-30 19:29:52,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215101 conditions, 13103 events. 6506/13103 cut-off events. For 1484422/1484422 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 122184 event pairs, 285 based on Foata normal form. 68/13171 useless extension candidates. Maximal degree in co-relation 214852. Up to 7101 conditions per place. [2023-08-30 19:29:52,123 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1738 selfloop transitions, 753 changer transitions 6/2497 dead transitions. [2023-08-30 19:29:52,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 768 places, 2497 transitions, 105089 flow [2023-08-30 19:29:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 19:29:52,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 19:29:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5549 transitions. [2023-08-30 19:29:52,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42088895631067963 [2023-08-30 19:29:52,127 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5549 transitions. [2023-08-30 19:29:52,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5549 transitions. [2023-08-30 19:29:52,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:29:52,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5549 transitions. [2023-08-30 19:29:52,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 173.40625) internal successors, (5549), 32 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:52,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:52,136 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:52,136 INFO L175 Difference]: Start difference. First operand has 737 places, 2251 transitions, 90446 flow. Second operand 32 states and 5549 transitions. [2023-08-30 19:29:52,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 768 places, 2497 transitions, 105089 flow [2023-08-30 19:30:24,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 2497 transitions, 102502 flow, removed 958 selfloop flow, removed 15 redundant places. [2023-08-30 19:30:24,337 INFO L231 Difference]: Finished difference. Result has 764 places, 2391 transitions, 96982 flow [2023-08-30 19:30:24,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=88453, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=614, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=96982, PETRI_PLACES=764, PETRI_TRANSITIONS=2391} [2023-08-30 19:30:24,339 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 744 predicate places. [2023-08-30 19:30:24,339 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 2391 transitions, 96982 flow [2023-08-30 19:30:24,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.88235294117646) internal successors, (2905), 17 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:30:24,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:30:24,340 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:30:24,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-08-30 19:30:24,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-30 19:30:24,545 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:30:24,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:30:24,546 INFO L85 PathProgramCache]: Analyzing trace with hash 414514617, now seen corresponding path program 67 times [2023-08-30 19:30:24,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:30:24,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216426240] [2023-08-30 19:30:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:30:24,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:30:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:30:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:30:24,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:30:24,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216426240] [2023-08-30 19:30:24,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216426240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:30:24,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998613036] [2023-08-30 19:30:24,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:30:24,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:30:24,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:30:24,607 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:30:24,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-30 19:30:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:30:24,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:30:24,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:30:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:30:24,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:30:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:30:24,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998613036] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:30:24,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:30:24,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-08-30 19:30:24,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445356210] [2023-08-30 19:30:24,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:30:24,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:30:24,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:30:24,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:30:24,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:30:24,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:30:24,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 2391 transitions, 96982 flow. Second operand has 17 states, 17 states have (on average 170.7058823529412) internal successors, (2902), 17 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:30:24,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:30:24,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:30:24,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:30:39,866 INFO L130 PetriNetUnfolder]: 7052/14173 cut-off events. [2023-08-30 19:30:39,867 INFO L131 PetriNetUnfolder]: For 1702508/1702508 co-relation queries the response was YES. [2023-08-30 19:30:40,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239137 conditions, 14173 events. 7052/14173 cut-off events. For 1702508/1702508 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 134216 event pairs, 517 based on Foata normal form. 110/14283 useless extension candidates. Maximal degree in co-relation 238878. Up to 9352 conditions per place. [2023-08-30 19:30:40,146 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1879 selfloop transitions, 866 changer transitions 0/2745 dead transitions. [2023-08-30 19:30:40,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 2745 transitions, 116600 flow [2023-08-30 19:30:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 19:30:40,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 19:30:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3839 transitions. [2023-08-30 19:30:40,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42354368932038833 [2023-08-30 19:30:40,149 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3839 transitions. [2023-08-30 19:30:40,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3839 transitions. [2023-08-30 19:30:40,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:30:40,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3839 transitions. [2023-08-30 19:30:40,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 174.5) internal successors, (3839), 22 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:30:40,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:30:40,156 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:30:40,156 INFO L175 Difference]: Start difference. First operand has 764 places, 2391 transitions, 96982 flow. Second operand 22 states and 3839 transitions. [2023-08-30 19:30:40,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 2745 transitions, 116600 flow [2023-08-30 19:31:17,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 2745 transitions, 113324 flow, removed 1144 selfloop flow, removed 16 redundant places. [2023-08-30 19:31:17,739 INFO L231 Difference]: Finished difference. Result has 777 places, 2579 transitions, 105209 flow [2023-08-30 19:31:17,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=93622, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=105209, PETRI_PLACES=777, PETRI_TRANSITIONS=2579} [2023-08-30 19:31:17,741 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 757 predicate places. [2023-08-30 19:31:17,741 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 2579 transitions, 105209 flow [2023-08-30 19:31:17,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.7058823529412) internal successors, (2902), 17 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:31:17,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:31:17,741 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:31:17,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-08-30 19:31:17,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:17,946 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:31:17,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:31:17,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1977314083, now seen corresponding path program 68 times [2023-08-30 19:31:17,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:31:17,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632015280] [2023-08-30 19:31:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:31:17,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:31:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:31:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:31:18,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:31:18,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632015280] [2023-08-30 19:31:18,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632015280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:18,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679287374] [2023-08-30 19:31:18,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:31:18,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:18,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:31:18,005 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:31:18,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-08-30 19:31:18,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:31:18,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:31:18,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:31:18,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:31:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:31:18,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:31:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:31:18,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679287374] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:31:18,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:31:18,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2023-08-30 19:31:18,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933580537] [2023-08-30 19:31:18,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:31:18,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:31:18,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:31:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:31:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:31:18,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:31:18,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 2579 transitions, 105209 flow. Second operand has 16 states, 16 states have (on average 170.9375) internal successors, (2735), 16 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:31:18,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:31:18,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:31:18,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:31:33,898 INFO L130 PetriNetUnfolder]: 6955/14036 cut-off events. [2023-08-30 19:31:33,898 INFO L131 PetriNetUnfolder]: For 1617603/1617603 co-relation queries the response was YES. [2023-08-30 19:31:34,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235552 conditions, 14036 events. 6955/14036 cut-off events. For 1617603/1617603 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 132966 event pairs, 269 based on Foata normal form. 92/14128 useless extension candidates. Maximal degree in co-relation 235286. Up to 6204 conditions per place. [2023-08-30 19:31:34,152 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1660 selfloop transitions, 1072 changer transitions 8/2740 dead transitions. [2023-08-30 19:31:34,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 2740 transitions, 116339 flow [2023-08-30 19:31:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 19:31:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 19:31:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5376 transitions. [2023-08-30 19:31:34,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42092076417162544 [2023-08-30 19:31:34,155 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5376 transitions. [2023-08-30 19:31:34,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5376 transitions. [2023-08-30 19:31:34,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:31:34,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5376 transitions. [2023-08-30 19:31:34,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 173.41935483870967) internal successors, (5376), 31 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:31:34,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:31:34,164 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:31:34,164 INFO L175 Difference]: Start difference. First operand has 777 places, 2579 transitions, 105209 flow. Second operand 31 states and 5376 transitions. [2023-08-30 19:31:34,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 2740 transitions, 116339 flow [2023-08-30 19:32:12,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 2740 transitions, 113467 flow, removed 996 selfloop flow, removed 10 redundant places. [2023-08-30 19:32:12,111 INFO L231 Difference]: Finished difference. Result has 801 places, 2615 transitions, 107085 flow [2023-08-30 19:32:12,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=101248, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=107085, PETRI_PLACES=801, PETRI_TRANSITIONS=2615} [2023-08-30 19:32:12,113 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 781 predicate places. [2023-08-30 19:32:12,113 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 2615 transitions, 107085 flow [2023-08-30 19:32:12,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.9375) internal successors, (2735), 16 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:32:12,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:32:12,114 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:32:12,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-08-30 19:32:12,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:32:12,318 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:32:12,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:32:12,319 INFO L85 PathProgramCache]: Analyzing trace with hash -21418435, now seen corresponding path program 69 times [2023-08-30 19:32:12,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:32:12,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094192530] [2023-08-30 19:32:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:32:12,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:32:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:32:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:32:12,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:32:12,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094192530] [2023-08-30 19:32:12,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094192530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:32:12,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803519499] [2023-08-30 19:32:12,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:32:12,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:32:12,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:32:12,386 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:32:12,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-08-30 19:32:12,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:32:12,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:32:12,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:32:12,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:32:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:32:12,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:32:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:32:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803519499] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:32:12,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:32:12,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-08-30 19:32:12,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136826785] [2023-08-30 19:32:12,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:32:12,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:32:12,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:32:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:32:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:32:12,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:32:12,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 801 places, 2615 transitions, 107085 flow. Second operand has 17 states, 17 states have (on average 170.8235294117647) internal successors, (2904), 17 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:32:12,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:32:12,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:32:12,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:32:28,190 INFO L130 PetriNetUnfolder]: 6961/14034 cut-off events. [2023-08-30 19:32:28,190 INFO L131 PetriNetUnfolder]: For 1555819/1555819 co-relation queries the response was YES. [2023-08-30 19:32:28,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237742 conditions, 14034 events. 6961/14034 cut-off events. For 1555819/1555819 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 132831 event pairs, 281 based on Foata normal form. 28/14062 useless extension candidates. Maximal degree in co-relation 237476. Up to 6341 conditions per place. [2023-08-30 19:32:28,446 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1678 selfloop transitions, 1097 changer transitions 6/2781 dead transitions. [2023-08-30 19:32:28,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 833 places, 2781 transitions, 118427 flow [2023-08-30 19:32:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 19:32:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 19:32:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5896 transitions. [2023-08-30 19:32:28,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209023415191319 [2023-08-30 19:32:28,450 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5896 transitions. [2023-08-30 19:32:28,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5896 transitions. [2023-08-30 19:32:28,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:32:28,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5896 transitions. [2023-08-30 19:32:28,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 173.41176470588235) internal successors, (5896), 34 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:32:28,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:32:28,459 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:32:28,460 INFO L175 Difference]: Start difference. First operand has 801 places, 2615 transitions, 107085 flow. Second operand 34 states and 5896 transitions. [2023-08-30 19:32:28,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 833 places, 2781 transitions, 118427 flow [2023-08-30 19:33:06,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 816 places, 2781 transitions, 116318 flow, removed 922 selfloop flow, removed 17 redundant places. [2023-08-30 19:33:06,248 INFO L231 Difference]: Finished difference. Result has 826 places, 2655 transitions, 111299 flow [2023-08-30 19:33:06,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=105284, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=111299, PETRI_PLACES=826, PETRI_TRANSITIONS=2655} [2023-08-30 19:33:06,250 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 806 predicate places. [2023-08-30 19:33:06,250 INFO L495 AbstractCegarLoop]: Abstraction has has 826 places, 2655 transitions, 111299 flow [2023-08-30 19:33:06,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.8235294117647) internal successors, (2904), 17 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:33:06,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:33:06,251 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:33:06,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-08-30 19:33:06,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-08-30 19:33:06,455 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:33:06,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:33:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1244867451, now seen corresponding path program 70 times [2023-08-30 19:33:06,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:33:06,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395300968] [2023-08-30 19:33:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:33:06,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:33:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:33:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:33:06,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:33:06,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395300968] [2023-08-30 19:33:06,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395300968] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:33:06,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170666963] [2023-08-30 19:33:06,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:33:06,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:33:06,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:33:06,518 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:33:06,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-08-30 19:33:06,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:33:06,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:33:06,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:33:06,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:33:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:33:06,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:33:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:33:06,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170666963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:33:06,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:33:06,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-30 19:33:06,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682922097] [2023-08-30 19:33:06,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:33:06,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:33:06,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:33:06,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:33:06,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:33:06,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:33:06,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 826 places, 2655 transitions, 111299 flow. Second operand has 17 states, 17 states have (on average 170.94117647058823) internal successors, (2906), 17 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:33:06,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:33:06,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:33:06,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:33:22,758 INFO L130 PetriNetUnfolder]: 7009/14176 cut-off events. [2023-08-30 19:33:22,759 INFO L131 PetriNetUnfolder]: For 1569885/1569885 co-relation queries the response was YES. [2023-08-30 19:33:22,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240940 conditions, 14176 events. 7009/14176 cut-off events. For 1569885/1569885 co-relation queries the response was YES. Maximal size of possible extension queue 1304. Compared 135145 event pairs, 2289 based on Foata normal form. 64/14240 useless extension candidates. Maximal degree in co-relation 240666. Up to 11093 conditions per place. [2023-08-30 19:33:23,045 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 2339 selfloop transitions, 459 changer transitions 0/2798 dead transitions. [2023-08-30 19:33:23,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 2798 transitions, 121645 flow [2023-08-30 19:33:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 19:33:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 19:33:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3496 transitions. [2023-08-30 19:33:23,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4242718446601942 [2023-08-30 19:33:23,048 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3496 transitions. [2023-08-30 19:33:23,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3496 transitions. [2023-08-30 19:33:23,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:33:23,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3496 transitions. [2023-08-30 19:33:23,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 174.8) internal successors, (3496), 20 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:33:23,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:33:23,054 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:33:23,054 INFO L175 Difference]: Start difference. First operand has 826 places, 2655 transitions, 111299 flow. Second operand 20 states and 3496 transitions. [2023-08-30 19:33:23,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 2798 transitions, 121645 flow [2023-08-30 19:34:01,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 2798 transitions, 120350 flow, removed 436 selfloop flow, removed 19 redundant places. [2023-08-30 19:34:01,418 INFO L231 Difference]: Finished difference. Result has 829 places, 2676 transitions, 112655 flow [2023-08-30 19:34:01,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=109616, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=112655, PETRI_PLACES=829, PETRI_TRANSITIONS=2676} [2023-08-30 19:34:01,419 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 809 predicate places. [2023-08-30 19:34:01,420 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2676 transitions, 112655 flow [2023-08-30 19:34:01,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.94117647058823) internal successors, (2906), 17 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:34:01,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:34:01,420 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:34:01,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-08-30 19:34:01,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:34:01,621 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:34:01,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:34:01,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1560994467, now seen corresponding path program 71 times [2023-08-30 19:34:01,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:34:01,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741415428] [2023-08-30 19:34:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:34:01,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:34:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:34:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:34:01,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:34:01,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741415428] [2023-08-30 19:34:01,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741415428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:34:01,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327972114] [2023-08-30 19:34:01,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:34:01,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:34:01,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:34:01,681 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:34:01,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-08-30 19:34:01,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:34:01,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:34:01,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:34:01,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:34:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:34:01,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:34:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:34:01,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327972114] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:34:01,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:34:01,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-30 19:34:01,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604226792] [2023-08-30 19:34:01,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:34:01,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:34:01,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:34:01,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:34:01,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:34:01,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:34:01,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2676 transitions, 112655 flow. Second operand has 17 states, 17 states have (on average 170.88235294117646) internal successors, (2905), 17 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:34:01,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:34:01,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:34:01,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:34:20,311 INFO L130 PetriNetUnfolder]: 7967/16156 cut-off events. [2023-08-30 19:34:20,311 INFO L131 PetriNetUnfolder]: For 1898636/1898636 co-relation queries the response was YES. [2023-08-30 19:34:20,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278656 conditions, 16156 events. 7967/16156 cut-off events. For 1898636/1898636 co-relation queries the response was YES. Maximal size of possible extension queue 1464. Compared 157258 event pairs, 239 based on Foata normal form. 48/16204 useless extension candidates. Maximal degree in co-relation 278382. Up to 5941 conditions per place. [2023-08-30 19:34:20,630 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1793 selfloop transitions, 1383 changer transitions 3/3179 dead transitions. [2023-08-30 19:34:20,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 3179 transitions, 139852 flow [2023-08-30 19:34:20,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 19:34:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 19:34:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6265 transitions. [2023-08-30 19:34:20,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223975188781014 [2023-08-30 19:34:20,633 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6265 transitions. [2023-08-30 19:34:20,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6265 transitions. [2023-08-30 19:34:20,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:34:20,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6265 transitions. [2023-08-30 19:34:20,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 174.02777777777777) internal successors, (6265), 36 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:34:20,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 412.0) internal successors, (15244), 37 states have internal predecessors, (15244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:34:20,644 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 412.0) internal successors, (15244), 37 states have internal predecessors, (15244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:34:20,644 INFO L175 Difference]: Start difference. First operand has 829 places, 2676 transitions, 112655 flow. Second operand 36 states and 6265 transitions. [2023-08-30 19:34:20,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 3179 transitions, 139852 flow [2023-08-30 19:35:10,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 855 places, 3179 transitions, 138546 flow, removed 359 selfloop flow, removed 9 redundant places. [2023-08-30 19:35:10,768 INFO L231 Difference]: Finished difference. Result has 864 places, 2968 transitions, 130690 flow [2023-08-30 19:35:10,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=111497, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=130690, PETRI_PLACES=864, PETRI_TRANSITIONS=2968} [2023-08-30 19:35:10,770 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 844 predicate places. [2023-08-30 19:35:10,770 INFO L495 AbstractCegarLoop]: Abstraction has has 864 places, 2968 transitions, 130690 flow [2023-08-30 19:35:10,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.88235294117646) internal successors, (2905), 17 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:35:10,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:35:10,771 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:35:10,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-08-30 19:35:10,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:35:10,976 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:35:10,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:35:10,976 INFO L85 PathProgramCache]: Analyzing trace with hash -42424643, now seen corresponding path program 72 times [2023-08-30 19:35:10,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:35:10,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929007374] [2023-08-30 19:35:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:35:10,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:35:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:35:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:35:11,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:35:11,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929007374] [2023-08-30 19:35:11,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929007374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:35:11,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63469475] [2023-08-30 19:35:11,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:35:11,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:35:11,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:35:11,053 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:35:11,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-08-30 19:35:11,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:35:11,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:35:11,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:35:11,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:35:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:35:11,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:35:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:35:11,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63469475] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:35:11,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:35:11,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2023-08-30 19:35:11,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538247267] [2023-08-30 19:35:11,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:35:11,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:35:11,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:35:11,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:35:11,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:35:11,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-30 19:35:11,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 864 places, 2968 transitions, 130690 flow. Second operand has 18 states, 18 states have (on average 170.77777777777777) internal successors, (3074), 18 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:35:11,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:35:11,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-30 19:35:11,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:35:39,782 INFO L130 PetriNetUnfolder]: 8219/16682 cut-off events. [2023-08-30 19:35:39,783 INFO L131 PetriNetUnfolder]: For 2105296/2105296 co-relation queries the response was YES. [2023-08-30 19:35:40,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297067 conditions, 16682 events. 8219/16682 cut-off events. For 2105296/2105296 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 163395 event pairs, 245 based on Foata normal form. 36/16718 useless extension candidates. Maximal degree in co-relation 296784. Up to 6338 conditions per place. [2023-08-30 19:35:40,322 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1753 selfloop transitions, 1497 changer transitions 5/3255 dead transitions. [2023-08-30 19:35:40,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 897 places, 3255 transitions, 148349 flow [2023-08-30 19:35:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 19:35:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 19:35:40,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6098 transitions. [2023-08-30 19:35:40,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228848821081831 [2023-08-30 19:35:40,327 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6098 transitions. [2023-08-30 19:35:40,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6098 transitions. [2023-08-30 19:35:40,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:35:40,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6098 transitions. [2023-08-30 19:35:40,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 174.22857142857143) internal successors, (6098), 35 states have internal predecessors, (6098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:35:40,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 412.0) internal successors, (14832), 36 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:35:40,341 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 412.0) internal successors, (14832), 36 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:35:40,341 INFO L175 Difference]: Start difference. First operand has 864 places, 2968 transitions, 130690 flow. Second operand 35 states and 6098 transitions. [2023-08-30 19:35:40,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 897 places, 3255 transitions, 148349 flow Killed by 15