./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-4.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/parallel-misc-4.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 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 --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 19:39:45,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:39:45,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:39:45,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:39:45,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:39:45,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:39:45,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:39:45,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:39:45,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:39:45,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:39:45,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:39:45,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:39:45,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:39:45,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:39:45,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:39:45,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:39:45,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:39:45,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:39:45,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:39:45,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:39:45,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:39:45,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:39:45,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:39:45,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:39:45,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:39:45,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:39:45,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:39:45,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:39:45,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:39:45,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:39:45,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:39:45,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:39:45,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:39:45,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:39:45,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:39:45,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:39:45,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:39:45,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:39:45,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:39:45,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:39:45,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:39:45,626 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:39:45,657 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:39:45,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:39:45,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:39:45,659 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:39:45,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:39:45,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:39:45,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:39:45,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:39:45,661 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:39:45,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:39:45,662 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:39:45,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:39:45,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:39:45,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:39:45,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:39:45,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:39:45,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:39:45,663 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:39:45,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:39:45,663 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:39:45,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:39:45,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:39:45,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:39:45,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:39:45,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:39:45,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:39:45,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:39:45,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:39:45,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:39:45,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:39:45,666 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:39:45,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:39:45,666 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:39:45,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:39:45,666 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:39:45,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:39:45,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:39:45,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:39:45,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:39:45,958 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:39:45,959 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:39:45,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-08-30 19:39:47,036 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:39:47,231 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:39:47,231 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-08-30 19:39:47,236 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be180d0f6/eaee5db0906c42809d6ca2854dc5d14d/FLAG192b6c4a3 [2023-08-30 19:39:47,247 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be180d0f6/eaee5db0906c42809d6ca2854dc5d14d [2023-08-30 19:39:47,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:39:47,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:39:47,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:39:47,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:39:47,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:39:47,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55cfea7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47, skipping insertion in model container [2023-08-30 19:39:47,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:39:47,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:39:47,404 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/parallel-misc-4.wvr.c[2950,2963] [2023-08-30 19:39:47,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:39:47,420 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:39:47,458 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/parallel-misc-4.wvr.c[2950,2963] [2023-08-30 19:39:47,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:39:47,471 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:39:47,473 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:39:47,479 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:39:47,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47 WrapperNode [2023-08-30 19:39:47,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:39:47,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:39:47,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:39:47,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:39:47,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,547 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-08-30 19:39:47,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:39:47,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:39:47,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:39:47,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:39:47,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,594 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:39:47,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:39:47,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:39:47,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:39:47,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47" (1/1) ... [2023-08-30 19:39:47,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:39:47,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:47,642 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 19:39:47,670 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 19:39:47,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:39:47,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:39:47,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:39:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:39:47,685 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:39:47,685 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:39:47,685 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:39:47,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:39:47,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:39:47,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:39:47,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 19:39:47,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 19:39:47,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:39:47,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:39:47,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:39:47,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:39:47,687 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 19:39:47,797 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:39:47,798 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:39:48,000 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:39:48,040 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:39:48,040 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 19:39:48,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:39:48 BoogieIcfgContainer [2023-08-30 19:39:48,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:39:48,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:39:48,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:39:48,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:39:48,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:39:47" (1/3) ... [2023-08-30 19:39:48,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5f269b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:39:48, skipping insertion in model container [2023-08-30 19:39:48,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:47" (2/3) ... [2023-08-30 19:39:48,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5f269b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:39:48, skipping insertion in model container [2023-08-30 19:39:48,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:39:48" (3/3) ... [2023-08-30 19:39:48,062 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2023-08-30 19:39:48,069 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:39:48,077 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:39:48,077 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:39:48,077 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:39:48,181 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 19:39:48,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 103 transitions, 230 flow [2023-08-30 19:39:48,301 INFO L130 PetriNetUnfolder]: 7/100 cut-off events. [2023-08-30 19:39:48,302 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:39:48,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 7/100 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2023-08-30 19:39:48,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 103 transitions, 230 flow [2023-08-30 19:39:48,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 90 transitions, 198 flow [2023-08-30 19:39:48,321 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:39:48,341 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 90 transitions, 198 flow [2023-08-30 19:39:48,347 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 90 transitions, 198 flow [2023-08-30 19:39:48,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 90 transitions, 198 flow [2023-08-30 19:39:48,389 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2023-08-30 19:39:48,389 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:39:48,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 90 events. 7/90 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2023-08-30 19:39:48,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 1134 [2023-08-30 19:39:51,109 INFO L134 LiptonReduction]: Checked pairs total: 1280 [2023-08-30 19:39:51,109 INFO L136 LiptonReduction]: Total number of compositions: 73 [2023-08-30 19:39:51,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:39:51,138 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;@e87099, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:39:51,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 19:39:51,148 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2023-08-30 19:39:51,148 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:39:51,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:51,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:51,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:51,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1669197162, now seen corresponding path program 1 times [2023-08-30 19:39:51,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:51,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144927077] [2023-08-30 19:39:51,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:51,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:51,851 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 19:39:51,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:51,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144927077] [2023-08-30 19:39:51,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144927077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:51,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:51,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:39:51,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390719478] [2023-08-30 19:39:51,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:51,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:39:51,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:51,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:39:51,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:39:51,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 176 [2023-08-30 19:39:51,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:51,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:51,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 176 [2023-08-30 19:39:51,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:52,162 INFO L130 PetriNetUnfolder]: 416/658 cut-off events. [2023-08-30 19:39:52,163 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-30 19:39:52,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 658 events. 416/658 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2588 event pairs, 65 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 1127. Up to 373 conditions per place. [2023-08-30 19:39:52,172 INFO L137 encePairwiseOnDemand]: 169/176 looper letters, 52 selfloop transitions, 5 changer transitions 19/77 dead transitions. [2023-08-30 19:39:52,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 77 transitions, 360 flow [2023-08-30 19:39:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:39:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:39:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 645 transitions. [2023-08-30 19:39:52,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523538961038961 [2023-08-30 19:39:52,189 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 645 transitions. [2023-08-30 19:39:52,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 645 transitions. [2023-08-30 19:39:52,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:52,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 645 transitions. [2023-08-30 19:39:52,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.14285714285714) internal successors, (645), 7 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:52,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 176.0) internal successors, (1408), 8 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:52,207 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 176.0) internal successors, (1408), 8 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:52,208 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 645 transitions. [2023-08-30 19:39:52,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 77 transitions, 360 flow [2023-08-30 19:39:52,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 77 transitions, 324 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 19:39:52,215 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2023-08-30 19:39:52,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-30 19:39:52,219 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-30 19:39:52,219 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2023-08-30 19:39:52,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:52,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:52,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:52,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:39:52,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:52,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:52,221 INFO L85 PathProgramCache]: Analyzing trace with hash -925139408, now seen corresponding path program 2 times [2023-08-30 19:39:52,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:52,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501789207] [2023-08-30 19:39:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:52,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:52,578 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 19:39:52,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:52,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501789207] [2023-08-30 19:39:52,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501789207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:52,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:52,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:39:52,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129458373] [2023-08-30 19:39:52,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:52,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:39:52,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:52,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:39:52,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:39:52,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 176 [2023-08-30 19:39:52,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:52,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:52,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 176 [2023-08-30 19:39:52,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:52,718 INFO L130 PetriNetUnfolder]: 268/444 cut-off events. [2023-08-30 19:39:52,718 INFO L131 PetriNetUnfolder]: For 557/573 co-relation queries the response was YES. [2023-08-30 19:39:52,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1416 conditions, 444 events. 268/444 cut-off events. For 557/573 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1669 event pairs, 18 based on Foata normal form. 28/462 useless extension candidates. Maximal degree in co-relation 919. Up to 249 conditions per place. [2023-08-30 19:39:52,721 INFO L137 encePairwiseOnDemand]: 172/176 looper letters, 37 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-08-30 19:39:52,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 262 flow [2023-08-30 19:39:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:39:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:39:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 378 transitions. [2023-08-30 19:39:52,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369318181818182 [2023-08-30 19:39:52,723 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 378 transitions. [2023-08-30 19:39:52,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 378 transitions. [2023-08-30 19:39:52,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:52,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 378 transitions. [2023-08-30 19:39:52,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:52,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 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 19:39:52,727 INFO L81 ComplementDD]: Finished complementDD. Result has 5 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 19:39:52,727 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 378 transitions. [2023-08-30 19:39:52,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 262 flow [2023-08-30 19:39:52,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 247 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 19:39:52,731 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2023-08-30 19:39:52,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-30 19:39:52,731 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-30 19:39:52,732 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2023-08-30 19:39:52,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:52,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:52,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:52,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:39:52,733 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:52,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash -377288482, now seen corresponding path program 3 times [2023-08-30 19:39:52,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:52,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641786097] [2023-08-30 19:39:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:52,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:53,026 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 19:39:53,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:53,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641786097] [2023-08-30 19:39:53,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641786097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:53,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:53,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:39:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665076072] [2023-08-30 19:39:53,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:53,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:39:53,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:39:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:39:53,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 176 [2023-08-30 19:39:53,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:53,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 176 [2023-08-30 19:39:53,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:53,176 INFO L130 PetriNetUnfolder]: 199/353 cut-off events. [2023-08-30 19:39:53,177 INFO L131 PetriNetUnfolder]: For 413/430 co-relation queries the response was YES. [2023-08-30 19:39:53,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 353 events. 199/353 cut-off events. For 413/430 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1231 event pairs, 32 based on Foata normal form. 33/386 useless extension candidates. Maximal degree in co-relation 1025. Up to 221 conditions per place. [2023-08-30 19:39:53,179 INFO L137 encePairwiseOnDemand]: 172/176 looper letters, 33 selfloop transitions, 7 changer transitions 2/44 dead transitions. [2023-08-30 19:39:53,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 281 flow [2023-08-30 19:39:53,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:39:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:39:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 374 transitions. [2023-08-30 19:39:53,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-08-30 19:39:53,181 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 374 transitions. [2023-08-30 19:39:53,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 374 transitions. [2023-08-30 19:39:53,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:53,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 374 transitions. [2023-08-30 19:39:53,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 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 19:39:53,185 INFO L81 ComplementDD]: Finished complementDD. Result has 5 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 19:39:53,185 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 4 states and 374 transitions. [2023-08-30 19:39:53,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 281 flow [2023-08-30 19:39:53,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:39:53,190 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 156 flow [2023-08-30 19:39:53,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-08-30 19:39:53,191 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2023-08-30 19:39:53,194 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 156 flow [2023-08-30 19:39:53,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:53,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:53,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:39:53,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:53,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:53,196 INFO L85 PathProgramCache]: Analyzing trace with hash -762312740, now seen corresponding path program 4 times [2023-08-30 19:39:53,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:53,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740418869] [2023-08-30 19:39:53,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:53,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:53,466 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 19:39:53,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:53,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740418869] [2023-08-30 19:39:53,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740418869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:53,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:53,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:39:53,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152091302] [2023-08-30 19:39:53,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:53,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:39:53,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:53,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:39:53,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:39:53,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 176 [2023-08-30 19:39:53,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:53,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 176 [2023-08-30 19:39:53,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:53,629 INFO L130 PetriNetUnfolder]: 209/361 cut-off events. [2023-08-30 19:39:53,630 INFO L131 PetriNetUnfolder]: For 616/642 co-relation queries the response was YES. [2023-08-30 19:39:53,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 361 events. 209/361 cut-off events. For 616/642 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1215 event pairs, 22 based on Foata normal form. 26/383 useless extension candidates. Maximal degree in co-relation 1078. Up to 146 conditions per place. [2023-08-30 19:39:53,632 INFO L137 encePairwiseOnDemand]: 170/176 looper letters, 38 selfloop transitions, 10 changer transitions 0/50 dead transitions. [2023-08-30 19:39:53,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 338 flow [2023-08-30 19:39:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:39:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:39:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 461 transitions. [2023-08-30 19:39:53,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238636363636363 [2023-08-30 19:39:53,639 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 461 transitions. [2023-08-30 19:39:53,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 461 transitions. [2023-08-30 19:39:53,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:53,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 461 transitions. [2023-08-30 19:39:53,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,643 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,643 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 156 flow. Second operand 5 states and 461 transitions. [2023-08-30 19:39:53,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 338 flow [2023-08-30 19:39:53,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 328 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 19:39:53,646 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 202 flow [2023-08-30 19:39:53,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-30 19:39:53,648 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-08-30 19:39:53,648 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 202 flow [2023-08-30 19:39:53,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:53,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:53,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 19:39:53,650 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:53,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:53,651 INFO L85 PathProgramCache]: Analyzing trace with hash 366060416, now seen corresponding path program 5 times [2023-08-30 19:39:53,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:53,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666277809] [2023-08-30 19:39:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:53,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:53,820 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 19:39:53,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:53,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666277809] [2023-08-30 19:39:53,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666277809] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:53,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:53,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:39:53,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966666991] [2023-08-30 19:39:53,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:53,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:39:53,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:53,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:39:53,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:39:53,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 176 [2023-08-30 19:39:53,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:53,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 176 [2023-08-30 19:39:53,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:53,974 INFO L130 PetriNetUnfolder]: 199/330 cut-off events. [2023-08-30 19:39:53,975 INFO L131 PetriNetUnfolder]: For 1001/1029 co-relation queries the response was YES. [2023-08-30 19:39:53,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1300 conditions, 330 events. 199/330 cut-off events. For 1001/1029 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1058 event pairs, 15 based on Foata normal form. 25/349 useless extension candidates. Maximal degree in co-relation 898. Up to 240 conditions per place. [2023-08-30 19:39:53,977 INFO L137 encePairwiseOnDemand]: 169/176 looper letters, 31 selfloop transitions, 3 changer transitions 18/54 dead transitions. [2023-08-30 19:39:53,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 402 flow [2023-08-30 19:39:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:39:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:39:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2023-08-30 19:39:53,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4991883116883117 [2023-08-30 19:39:53,980 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2023-08-30 19:39:53,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2023-08-30 19:39:53,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:53,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2023-08-30 19:39:53,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 176.0) internal successors, (1408), 8 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,984 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 176.0) internal successors, (1408), 8 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,984 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 202 flow. Second operand 7 states and 615 transitions. [2023-08-30 19:39:53,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 402 flow [2023-08-30 19:39:53,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 19:39:53,988 INFO L231 Difference]: Finished difference. Result has 52 places, 30 transitions, 168 flow [2023-08-30 19:39:53,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=30} [2023-08-30 19:39:53,989 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2023-08-30 19:39:53,989 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 30 transitions, 168 flow [2023-08-30 19:39:53,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:53,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:53,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:53,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 19:39:53,990 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:53,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:53,990 INFO L85 PathProgramCache]: Analyzing trace with hash 156642809, now seen corresponding path program 1 times [2023-08-30 19:39:53,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:53,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619016634] [2023-08-30 19:39:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:53,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:54,142 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 19:39:54,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:54,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619016634] [2023-08-30 19:39:54,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619016634] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:54,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:54,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:39:54,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187984235] [2023-08-30 19:39:54,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:54,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:39:54,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:54,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:39:54,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:39:54,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 176 [2023-08-30 19:39:54,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 30 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:54,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:54,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 176 [2023-08-30 19:39:54,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:54,449 INFO L130 PetriNetUnfolder]: 335/554 cut-off events. [2023-08-30 19:39:54,449 INFO L131 PetriNetUnfolder]: For 1326/1326 co-relation queries the response was YES. [2023-08-30 19:39:54,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 554 events. 335/554 cut-off events. For 1326/1326 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1992 event pairs, 14 based on Foata normal form. 16/570 useless extension candidates. Maximal degree in co-relation 2112. Up to 191 conditions per place. [2023-08-30 19:39:54,454 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 76 selfloop transitions, 34 changer transitions 0/110 dead transitions. [2023-08-30 19:39:54,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 110 transitions, 835 flow [2023-08-30 19:39:54,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:39:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:39:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 825 transitions. [2023-08-30 19:39:54,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-08-30 19:39:54,457 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 825 transitions. [2023-08-30 19:39:54,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 825 transitions. [2023-08-30 19:39:54,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:54,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 825 transitions. [2023-08-30 19:39:54,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.66666666666667) internal successors, (825), 9 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:54,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:54,462 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:54,463 INFO L175 Difference]: Start difference. First operand has 52 places, 30 transitions, 168 flow. Second operand 9 states and 825 transitions. [2023-08-30 19:39:54,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 110 transitions, 835 flow [2023-08-30 19:39:54,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 110 transitions, 779 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-08-30 19:39:54,469 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 507 flow [2023-08-30 19:39:54,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=507, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-30 19:39:54,470 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2023-08-30 19:39:54,470 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 507 flow [2023-08-30 19:39:54,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:54,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:54,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:54,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 19:39:54,471 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:54,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:54,471 INFO L85 PathProgramCache]: Analyzing trace with hash -960778785, now seen corresponding path program 2 times [2023-08-30 19:39:54,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:54,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237664116] [2023-08-30 19:39:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:54,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:54,621 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 19:39:54,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:54,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237664116] [2023-08-30 19:39:54,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237664116] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:54,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:54,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:39:54,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548760716] [2023-08-30 19:39:54,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:54,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:39:54,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:39:54,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:39:54,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 176 [2023-08-30 19:39:54,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 507 flow. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:54,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:54,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 176 [2023-08-30 19:39:54,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:54,926 INFO L130 PetriNetUnfolder]: 483/856 cut-off events. [2023-08-30 19:39:54,926 INFO L131 PetriNetUnfolder]: For 5283/5283 co-relation queries the response was YES. [2023-08-30 19:39:54,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4418 conditions, 856 events. 483/856 cut-off events. For 5283/5283 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3629 event pairs, 39 based on Foata normal form. 20/876 useless extension candidates. Maximal degree in co-relation 3390. Up to 303 conditions per place. [2023-08-30 19:39:54,934 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 98 selfloop transitions, 61 changer transitions 0/159 dead transitions. [2023-08-30 19:39:54,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 159 transitions, 1568 flow [2023-08-30 19:39:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:39:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:39:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 823 transitions. [2023-08-30 19:39:54,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195707070707071 [2023-08-30 19:39:54,937 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 823 transitions. [2023-08-30 19:39:54,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 823 transitions. [2023-08-30 19:39:54,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:54,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 823 transitions. [2023-08-30 19:39:54,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.44444444444444) internal successors, (823), 9 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:54,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:54,942 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:54,942 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 507 flow. Second operand 9 states and 823 transitions. [2023-08-30 19:39:54,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 159 transitions, 1568 flow [2023-08-30 19:39:54,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 159 transitions, 1550 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-30 19:39:54,959 INFO L231 Difference]: Finished difference. Result has 71 places, 99 transitions, 1193 flow [2023-08-30 19:39:54,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1193, PETRI_PLACES=71, PETRI_TRANSITIONS=99} [2023-08-30 19:39:54,960 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2023-08-30 19:39:54,960 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 99 transitions, 1193 flow [2023-08-30 19:39:54,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:54,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:54,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:54,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 19:39:54,962 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:54,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:54,962 INFO L85 PathProgramCache]: Analyzing trace with hash -602311999, now seen corresponding path program 3 times [2023-08-30 19:39:54,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:54,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464778563] [2023-08-30 19:39:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:54,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:55,070 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 19:39:55,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:55,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464778563] [2023-08-30 19:39:55,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464778563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:55,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:55,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:39:55,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447963691] [2023-08-30 19:39:55,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:55,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:39:55,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:55,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:39:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:39:55,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 176 [2023-08-30 19:39:55,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 99 transitions, 1193 flow. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:55,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:55,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 176 [2023-08-30 19:39:55,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:55,384 INFO L130 PetriNetUnfolder]: 568/983 cut-off events. [2023-08-30 19:39:55,384 INFO L131 PetriNetUnfolder]: For 11208/11208 co-relation queries the response was YES. [2023-08-30 19:39:55,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6248 conditions, 983 events. 568/983 cut-off events. For 11208/11208 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4232 event pairs, 8 based on Foata normal form. 40/1023 useless extension candidates. Maximal degree in co-relation 5213. Up to 472 conditions per place. [2023-08-30 19:39:55,392 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 97 selfloop transitions, 42 changer transitions 35/174 dead transitions. [2023-08-30 19:39:55,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 174 transitions, 2309 flow [2023-08-30 19:39:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:39:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:39:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 799 transitions. [2023-08-30 19:39:55,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044191919191919 [2023-08-30 19:39:55,396 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 799 transitions. [2023-08-30 19:39:55,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 799 transitions. [2023-08-30 19:39:55,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:55,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 799 transitions. [2023-08-30 19:39:55,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 88.77777777777777) internal successors, (799), 9 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:55,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:55,403 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:55,403 INFO L175 Difference]: Start difference. First operand has 71 places, 99 transitions, 1193 flow. Second operand 9 states and 799 transitions. [2023-08-30 19:39:55,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 174 transitions, 2309 flow [2023-08-30 19:39:55,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 174 transitions, 2191 flow, removed 59 selfloop flow, removed 0 redundant places. [2023-08-30 19:39:55,446 INFO L231 Difference]: Finished difference. Result has 85 places, 104 transitions, 1387 flow [2023-08-30 19:39:55,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1387, PETRI_PLACES=85, PETRI_TRANSITIONS=104} [2023-08-30 19:39:55,449 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2023-08-30 19:39:55,450 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 104 transitions, 1387 flow [2023-08-30 19:39:55,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:55,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:55,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:55,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 19:39:55,450 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:55,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:55,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2082278653, now seen corresponding path program 4 times [2023-08-30 19:39:55,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:55,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061326884] [2023-08-30 19:39:55,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:55,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:55,985 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 19:39:55,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:55,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061326884] [2023-08-30 19:39:55,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061326884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:55,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:55,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 19:39:55,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241553185] [2023-08-30 19:39:55,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:55,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:39:55,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:55,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:39:55,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:39:56,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 176 [2023-08-30 19:39:56,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 104 transitions, 1387 flow. Second operand has 7 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:56,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 176 [2023-08-30 19:39:56,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:56,323 INFO L130 PetriNetUnfolder]: 505/924 cut-off events. [2023-08-30 19:39:56,323 INFO L131 PetriNetUnfolder]: For 11746/11782 co-relation queries the response was YES. [2023-08-30 19:39:56,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6076 conditions, 924 events. 505/924 cut-off events. For 11746/11782 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4282 event pairs, 30 based on Foata normal form. 30/947 useless extension candidates. Maximal degree in co-relation 4837. Up to 642 conditions per place. [2023-08-30 19:39:56,333 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 102 selfloop transitions, 13 changer transitions 60/182 dead transitions. [2023-08-30 19:39:56,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 182 transitions, 2663 flow [2023-08-30 19:39:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:39:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:39:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 840 transitions. [2023-08-30 19:39:56,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2023-08-30 19:39:56,336 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 840 transitions. [2023-08-30 19:39:56,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 840 transitions. [2023-08-30 19:39:56,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:56,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 840 transitions. [2023-08-30 19:39:56,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 176.0) internal successors, (1936), 11 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,342 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 176.0) internal successors, (1936), 11 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,342 INFO L175 Difference]: Start difference. First operand has 85 places, 104 transitions, 1387 flow. Second operand 10 states and 840 transitions. [2023-08-30 19:39:56,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 182 transitions, 2663 flow [2023-08-30 19:39:56,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 182 transitions, 2565 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-08-30 19:39:56,381 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 1505 flow [2023-08-30 19:39:56,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1505, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2023-08-30 19:39:56,382 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2023-08-30 19:39:56,382 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 1505 flow [2023-08-30 19:39:56,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:56,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:56,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 19:39:56,383 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:56,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:56,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1139668964, now seen corresponding path program 1 times [2023-08-30 19:39:56,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:56,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132412049] [2023-08-30 19:39:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:56,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:56,601 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 19:39:56,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:56,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132412049] [2023-08-30 19:39:56,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132412049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:56,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:56,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:39:56,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576081914] [2023-08-30 19:39:56,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:56,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:39:56,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:56,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:39:56,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 19:39:56,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 176 [2023-08-30 19:39:56,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 1505 flow. Second operand has 6 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:56,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 176 [2023-08-30 19:39:56,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:56,905 INFO L130 PetriNetUnfolder]: 569/1016 cut-off events. [2023-08-30 19:39:56,905 INFO L131 PetriNetUnfolder]: For 13840/13853 co-relation queries the response was YES. [2023-08-30 19:39:56,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7253 conditions, 1016 events. 569/1016 cut-off events. For 13840/13853 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4581 event pairs, 31 based on Foata normal form. 55/1069 useless extension candidates. Maximal degree in co-relation 6035. Up to 681 conditions per place. [2023-08-30 19:39:56,915 INFO L137 encePairwiseOnDemand]: 169/176 looper letters, 112 selfloop transitions, 13 changer transitions 63/193 dead transitions. [2023-08-30 19:39:56,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 193 transitions, 3064 flow [2023-08-30 19:39:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:39:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:39:56,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 679 transitions. [2023-08-30 19:39:56,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4822443181818182 [2023-08-30 19:39:56,918 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 679 transitions. [2023-08-30 19:39:56,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 679 transitions. [2023-08-30 19:39:56,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:56,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 679 transitions. [2023-08-30 19:39:56,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 84.875) internal successors, (679), 8 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 176.0) internal successors, (1584), 9 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,922 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 176.0) internal successors, (1584), 9 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,923 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 1505 flow. Second operand 8 states and 679 transitions. [2023-08-30 19:39:56,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 193 transitions, 3064 flow [2023-08-30 19:39:56,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 193 transitions, 2893 flow, removed 44 selfloop flow, removed 6 redundant places. [2023-08-30 19:39:56,971 INFO L231 Difference]: Finished difference. Result has 96 places, 116 transitions, 1613 flow [2023-08-30 19:39:56,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1613, PETRI_PLACES=96, PETRI_TRANSITIONS=116} [2023-08-30 19:39:56,972 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2023-08-30 19:39:56,972 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 116 transitions, 1613 flow [2023-08-30 19:39:56,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:56,973 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:56,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 19:39:56,973 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:56,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:56,974 INFO L85 PathProgramCache]: Analyzing trace with hash -696084226, now seen corresponding path program 5 times [2023-08-30 19:39:56,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:56,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15472179] [2023-08-30 19:39:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:56,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:57,420 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 19:39:57,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:57,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15472179] [2023-08-30 19:39:57,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15472179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:57,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910044994] [2023-08-30 19:39:57,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:39:57,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:57,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:57,425 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 19:39:57,455 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 19:39:57,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:39:57,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:57,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 19:39:57,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:57,839 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 19:39:57,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:58,074 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 19:39:58,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910044994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:58,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:58,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-30 19:39:58,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783380947] [2023-08-30 19:39:58,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:58,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:39:58,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:58,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:39:58,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:39:58,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 176 [2023-08-30 19:39:58,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 116 transitions, 1613 flow. Second operand has 17 states, 17 states have (on average 77.3529411764706) internal successors, (1315), 17 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:58,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:58,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 176 [2023-08-30 19:39:58,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:59,899 INFO L130 PetriNetUnfolder]: 1087/1933 cut-off events. [2023-08-30 19:39:59,899 INFO L131 PetriNetUnfolder]: For 29181/29185 co-relation queries the response was YES. [2023-08-30 19:39:59,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13616 conditions, 1933 events. 1087/1933 cut-off events. For 29181/29185 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10236 event pairs, 14 based on Foata normal form. 84/2016 useless extension candidates. Maximal degree in co-relation 11291. Up to 611 conditions per place. [2023-08-30 19:39:59,918 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 149 selfloop transitions, 119 changer transitions 213/488 dead transitions. [2023-08-30 19:39:59,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 488 transitions, 7190 flow [2023-08-30 19:39:59,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 19:39:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 19:39:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3246 transitions. [2023-08-30 19:39:59,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46107954545454544 [2023-08-30 19:39:59,926 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3246 transitions. [2023-08-30 19:39:59,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3246 transitions. [2023-08-30 19:39:59,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:59,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3246 transitions. [2023-08-30 19:39:59,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 81.15) internal successors, (3246), 40 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:59,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 176.0) internal successors, (7216), 41 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:59,945 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 176.0) internal successors, (7216), 41 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:59,945 INFO L175 Difference]: Start difference. First operand has 96 places, 116 transitions, 1613 flow. Second operand 40 states and 3246 transitions. [2023-08-30 19:39:59,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 488 transitions, 7190 flow [2023-08-30 19:40:00,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 488 transitions, 6883 flow, removed 145 selfloop flow, removed 5 redundant places. [2023-08-30 19:40:00,036 INFO L231 Difference]: Finished difference. Result has 143 places, 196 transitions, 3320 flow [2023-08-30 19:40:00,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3320, PETRI_PLACES=143, PETRI_TRANSITIONS=196} [2023-08-30 19:40:00,037 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2023-08-30 19:40:00,037 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 196 transitions, 3320 flow [2023-08-30 19:40:00,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 77.3529411764706) internal successors, (1315), 17 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:00,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:00,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:00,052 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 19:40:00,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 19:40:00,245 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:40:00,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:00,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1935321177, now seen corresponding path program 1 times [2023-08-30 19:40:00,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:00,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816002278] [2023-08-30 19:40:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:00,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:00,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:00,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816002278] [2023-08-30 19:40:00,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816002278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:00,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711976066] [2023-08-30 19:40:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:00,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:00,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:00,680 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 19:40:00,685 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 19:40:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 19:40:00,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:01,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:01,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711976066] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:01,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:01,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-08-30 19:40:01,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826592197] [2023-08-30 19:40:01,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:01,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:40:01,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:40:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:40:01,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-08-30 19:40:01,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 196 transitions, 3320 flow. Second operand has 17 states, 17 states have (on average 72.88235294117646) internal successors, (1239), 17 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:01,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:01,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-08-30 19:40:01,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:03,711 INFO L130 PetriNetUnfolder]: 1556/2676 cut-off events. [2023-08-30 19:40:03,711 INFO L131 PetriNetUnfolder]: For 54921/54931 co-relation queries the response was YES. [2023-08-30 19:40:03,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21250 conditions, 2676 events. 1556/2676 cut-off events. For 54921/54931 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14609 event pairs, 30 based on Foata normal form. 84/2759 useless extension candidates. Maximal degree in co-relation 19355. Up to 841 conditions per place. [2023-08-30 19:40:03,745 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 229 selfloop transitions, 159 changer transitions 218/613 dead transitions. [2023-08-30 19:40:03,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 613 transitions, 10255 flow [2023-08-30 19:40:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 19:40:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 19:40:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3371 transitions. [2023-08-30 19:40:03,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353047520661157 [2023-08-30 19:40:03,752 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3371 transitions. [2023-08-30 19:40:03,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3371 transitions. [2023-08-30 19:40:03,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:03,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3371 transitions. [2023-08-30 19:40:03,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 76.61363636363636) internal successors, (3371), 44 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:03,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:03,771 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:03,771 INFO L175 Difference]: Start difference. First operand has 143 places, 196 transitions, 3320 flow. Second operand 44 states and 3371 transitions. [2023-08-30 19:40:03,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 613 transitions, 10255 flow [2023-08-30 19:40:03,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 613 transitions, 8567 flow, removed 787 selfloop flow, removed 14 redundant places. [2023-08-30 19:40:04,005 INFO L231 Difference]: Finished difference. Result has 184 places, 293 transitions, 4540 flow [2023-08-30 19:40:04,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4540, PETRI_PLACES=184, PETRI_TRANSITIONS=293} [2023-08-30 19:40:04,006 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2023-08-30 19:40:04,006 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 293 transitions, 4540 flow [2023-08-30 19:40:04,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 72.88235294117646) internal successors, (1239), 17 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:04,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:04,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:04,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:40:04,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 19:40:04,215 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:40:04,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:04,215 INFO L85 PathProgramCache]: Analyzing trace with hash 641822062, now seen corresponding path program 2 times [2023-08-30 19:40:04,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:04,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68570787] [2023-08-30 19:40:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:04,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:04,467 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 19:40:04,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:04,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68570787] [2023-08-30 19:40:04,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68570787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:04,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68652045] [2023-08-30 19:40:04,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:40:04,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:04,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:04,469 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 19:40:04,471 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 19:40:04,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:40:04,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:04,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 19:40:04,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:04,871 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 19:40:04,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:05,016 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 19:40:05,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68652045] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:05,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:05,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2023-08-30 19:40:05,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845899946] [2023-08-30 19:40:05,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:05,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:40:05,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:40:05,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:40:05,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 176 [2023-08-30 19:40:05,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 293 transitions, 4540 flow. Second operand has 16 states, 16 states have (on average 75.625) internal successors, (1210), 16 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:05,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:05,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 176 [2023-08-30 19:40:05,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:07,765 INFO L130 PetriNetUnfolder]: 1998/3373 cut-off events. [2023-08-30 19:40:07,766 INFO L131 PetriNetUnfolder]: For 58136/58136 co-relation queries the response was YES. [2023-08-30 19:40:07,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26150 conditions, 3373 events. 1998/3373 cut-off events. For 58136/58136 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18534 event pairs, 47 based on Foata normal form. 158/3531 useless extension candidates. Maximal degree in co-relation 25962. Up to 981 conditions per place. [2023-08-30 19:40:07,810 INFO L137 encePairwiseOnDemand]: 166/176 looper letters, 281 selfloop transitions, 201 changer transitions 246/728 dead transitions. [2023-08-30 19:40:07,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 728 transitions, 12477 flow [2023-08-30 19:40:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-30 19:40:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-30 19:40:07,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4720 transitions. [2023-08-30 19:40:07,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4396423248882265 [2023-08-30 19:40:07,817 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4720 transitions. [2023-08-30 19:40:07,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4720 transitions. [2023-08-30 19:40:07,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:07,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4720 transitions. [2023-08-30 19:40:07,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 77.37704918032787) internal successors, (4720), 61 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:07,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 176.0) internal successors, (10912), 62 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:07,838 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 176.0) internal successors, (10912), 62 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:07,838 INFO L175 Difference]: Start difference. First operand has 184 places, 293 transitions, 4540 flow. Second operand 61 states and 4720 transitions. [2023-08-30 19:40:07,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 728 transitions, 12477 flow [2023-08-30 19:40:08,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 728 transitions, 11330 flow, removed 562 selfloop flow, removed 25 redundant places. [2023-08-30 19:40:08,144 INFO L231 Difference]: Finished difference. Result has 239 places, 374 transitions, 6209 flow [2023-08-30 19:40:08,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=4058, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6209, PETRI_PLACES=239, PETRI_TRANSITIONS=374} [2023-08-30 19:40:08,145 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2023-08-30 19:40:08,145 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 374 transitions, 6209 flow [2023-08-30 19:40:08,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.625) internal successors, (1210), 16 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:08,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:08,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:08,158 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 19:40:08,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:08,359 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:40:08,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:08,359 INFO L85 PathProgramCache]: Analyzing trace with hash 216840545, now seen corresponding path program 2 times [2023-08-30 19:40:08,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:08,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158455960] [2023-08-30 19:40:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:08,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:08,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:08,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158455960] [2023-08-30 19:40:08,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158455960] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:08,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808800872] [2023-08-30 19:40:08,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:40:08,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:08,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:08,825 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 19:40:08,829 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 19:40:08,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:40:08,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:08,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 19:40:08,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:09,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:09,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808800872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:09,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:09,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-08-30 19:40:09,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870048933] [2023-08-30 19:40:09,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:09,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:40:09,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:09,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:40:09,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:40:09,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-08-30 19:40:09,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 374 transitions, 6209 flow. Second operand has 21 states, 21 states have (on average 72.52380952380952) internal successors, (1523), 21 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:09,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:09,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-08-30 19:40:09,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:12,615 INFO L130 PetriNetUnfolder]: 2590/4426 cut-off events. [2023-08-30 19:40:12,615 INFO L131 PetriNetUnfolder]: For 107915/107920 co-relation queries the response was YES. [2023-08-30 19:40:12,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36413 conditions, 4426 events. 2590/4426 cut-off events. For 107915/107920 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 25463 event pairs, 52 based on Foata normal form. 149/4575 useless extension candidates. Maximal degree in co-relation 35620. Up to 1319 conditions per place. [2023-08-30 19:40:12,670 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 305 selfloop transitions, 312 changer transitions 277/897 dead transitions. [2023-08-30 19:40:12,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 897 transitions, 16375 flow [2023-08-30 19:40:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 19:40:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 19:40:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4024 transitions. [2023-08-30 19:40:12,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43138936535162953 [2023-08-30 19:40:12,679 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4024 transitions. [2023-08-30 19:40:12,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4024 transitions. [2023-08-30 19:40:12,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:12,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4024 transitions. [2023-08-30 19:40:12,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 75.9245283018868) internal successors, (4024), 53 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:12,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 176.0) internal successors, (9504), 54 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:12,697 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 176.0) internal successors, (9504), 54 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:12,698 INFO L175 Difference]: Start difference. First operand has 239 places, 374 transitions, 6209 flow. Second operand 53 states and 4024 transitions. [2023-08-30 19:40:12,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 897 transitions, 16375 flow [2023-08-30 19:40:13,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 897 transitions, 13801 flow, removed 1035 selfloop flow, removed 41 redundant places. [2023-08-30 19:40:13,320 INFO L231 Difference]: Finished difference. Result has 235 places, 502 transitions, 8372 flow [2023-08-30 19:40:13,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=5397, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=8372, PETRI_PLACES=235, PETRI_TRANSITIONS=502} [2023-08-30 19:40:13,321 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2023-08-30 19:40:13,322 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 502 transitions, 8372 flow [2023-08-30 19:40:13,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 72.52380952380952) internal successors, (1523), 21 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:13,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:13,322 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:13,331 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 19:40:13,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:13,528 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:40:13,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:13,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1207528187, now seen corresponding path program 3 times [2023-08-30 19:40:13,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:13,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039416442] [2023-08-30 19:40:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:13,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:14,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039416442] [2023-08-30 19:40:14,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039416442] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322238894] [2023-08-30 19:40:14,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:40:14,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:14,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:14,121 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 19:40:14,146 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 19:40:14,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 19:40:14,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:14,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 19:40:14,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:14,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:40:15,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322238894] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:15,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:15,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-08-30 19:40:15,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974820090] [2023-08-30 19:40:15,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:15,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 19:40:15,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 19:40:15,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:40:15,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 176 [2023-08-30 19:40:15,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 502 transitions, 8372 flow. Second operand has 26 states, 26 states have (on average 68.53846153846153) internal successors, (1782), 26 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:15,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:15,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 176 [2023-08-30 19:40:15,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:18,889 INFO L130 PetriNetUnfolder]: 2615/4366 cut-off events. [2023-08-30 19:40:18,889 INFO L131 PetriNetUnfolder]: For 68799/68799 co-relation queries the response was YES. [2023-08-30 19:40:18,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34736 conditions, 4366 events. 2615/4366 cut-off events. For 68799/68799 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23947 event pairs, 59 based on Foata normal form. 96/4462 useless extension candidates. Maximal degree in co-relation 34519. Up to 1341 conditions per place. [2023-08-30 19:40:18,939 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 362 selfloop transitions, 375 changer transitions 177/914 dead transitions. [2023-08-30 19:40:18,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 914 transitions, 15700 flow [2023-08-30 19:40:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-30 19:40:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-30 19:40:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 5130 transitions. [2023-08-30 19:40:18,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40482954545454547 [2023-08-30 19:40:18,947 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 5130 transitions. [2023-08-30 19:40:18,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 5130 transitions. [2023-08-30 19:40:18,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:18,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 5130 transitions. [2023-08-30 19:40:18,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 71.25) internal successors, (5130), 72 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:18,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 176.0) internal successors, (12848), 73 states have internal predecessors, (12848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:18,969 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 176.0) internal successors, (12848), 73 states have internal predecessors, (12848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:18,970 INFO L175 Difference]: Start difference. First operand has 235 places, 502 transitions, 8372 flow. Second operand 72 states and 5130 transitions. [2023-08-30 19:40:18,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 914 transitions, 15700 flow [2023-08-30 19:40:19,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 914 transitions, 14440 flow, removed 495 selfloop flow, removed 29 redundant places. [2023-08-30 19:40:19,532 INFO L231 Difference]: Finished difference. Result has 284 places, 591 transitions, 10286 flow [2023-08-30 19:40:19,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=7661, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=10286, PETRI_PLACES=284, PETRI_TRANSITIONS=591} [2023-08-30 19:40:19,533 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2023-08-30 19:40:19,533 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 591 transitions, 10286 flow [2023-08-30 19:40:19,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 68.53846153846153) internal successors, (1782), 26 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:19,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:19,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:19,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 19:40:19,734 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,SelfDestructingSolverStorable14 [2023-08-30 19:40:19,734 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:40:19,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:19,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1794503256, now seen corresponding path program 4 times [2023-08-30 19:40:19,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:19,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692652372] [2023-08-30 19:40:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:19,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:20,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:20,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692652372] [2023-08-30 19:40:20,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692652372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:20,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991242609] [2023-08-30 19:40:20,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:40:20,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:20,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:20,205 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 19:40:20,208 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 19:40:20,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:40:20,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:20,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 19:40:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:20,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:21,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991242609] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:21,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:21,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 23 [2023-08-30 19:40:21,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238239506] [2023-08-30 19:40:21,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:21,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 19:40:21,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:21,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 19:40:21,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-08-30 19:40:21,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-08-30 19:40:21,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 591 transitions, 10286 flow. Second operand has 24 states, 24 states have (on average 72.45833333333333) internal successors, (1739), 24 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:21,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:21,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-08-30 19:40:21,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:25,987 INFO L130 PetriNetUnfolder]: 5091/8635 cut-off events. [2023-08-30 19:40:25,987 INFO L131 PetriNetUnfolder]: For 155622/155624 co-relation queries the response was YES. [2023-08-30 19:40:26,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74300 conditions, 8635 events. 5091/8635 cut-off events. For 155622/155624 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 56200 event pairs, 52 based on Foata normal form. 304/8937 useless extension candidates. Maximal degree in co-relation 73669. Up to 2583 conditions per place. [2023-08-30 19:40:26,091 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 397 selfloop transitions, 828 changer transitions 553/1788 dead transitions. [2023-08-30 19:40:26,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1788 transitions, 35094 flow [2023-08-30 19:40:26,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-08-30 19:40:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2023-08-30 19:40:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 7617 transitions. [2023-08-30 19:40:26,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428499099909991 [2023-08-30 19:40:26,103 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 7617 transitions. [2023-08-30 19:40:26,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 7617 transitions. [2023-08-30 19:40:26,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:26,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 7617 transitions. [2023-08-30 19:40:26,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 75.41584158415841) internal successors, (7617), 101 states have internal predecessors, (7617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:26,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 176.0) internal successors, (17952), 102 states have internal predecessors, (17952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:26,139 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 176.0) internal successors, (17952), 102 states have internal predecessors, (17952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:26,139 INFO L175 Difference]: Start difference. First operand has 284 places, 591 transitions, 10286 flow. Second operand 101 states and 7617 transitions. [2023-08-30 19:40:26,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1788 transitions, 35094 flow [2023-08-30 19:40:27,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1788 transitions, 32014 flow, removed 1300 selfloop flow, removed 38 redundant places. [2023-08-30 19:40:27,817 INFO L231 Difference]: Finished difference. Result has 361 places, 978 transitions, 18839 flow [2023-08-30 19:40:27,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=9186, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=18839, PETRI_PLACES=361, PETRI_TRANSITIONS=978} [2023-08-30 19:40:27,818 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 331 predicate places. [2023-08-30 19:40:27,818 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 978 transitions, 18839 flow [2023-08-30 19:40:27,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 72.45833333333333) internal successors, (1739), 24 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:27,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:27,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:27,828 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 19:40:28,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 19:40:28,025 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:40:28,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:28,025 INFO L85 PathProgramCache]: Analyzing trace with hash 917495554, now seen corresponding path program 5 times [2023-08-30 19:40:28,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:28,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935740905] [2023-08-30 19:40:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:28,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:28,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:28,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935740905] [2023-08-30 19:40:28,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935740905] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:28,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390745903] [2023-08-30 19:40:28,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:40:28,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:28,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:28,570 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 19:40:28,572 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 19:40:28,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 19:40:28,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:28,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 19:40:28,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:28,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:29,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390745903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:29,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:29,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-30 19:40:29,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237411689] [2023-08-30 19:40:29,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:29,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 19:40:29,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:29,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 19:40:29,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:40:29,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-08-30 19:40:29,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 978 transitions, 18839 flow. Second operand has 26 states, 26 states have (on average 72.26923076923077) internal successors, (1879), 26 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:29,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:29,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-08-30 19:40:29,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:39,358 INFO L130 PetriNetUnfolder]: 10634/18130 cut-off events. [2023-08-30 19:40:39,358 INFO L131 PetriNetUnfolder]: For 370831/370834 co-relation queries the response was YES. [2023-08-30 19:40:39,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164413 conditions, 18130 events. 10634/18130 cut-off events. For 370831/370834 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 132820 event pairs, 174 based on Foata normal form. 427/18557 useless extension candidates. Maximal degree in co-relation 164067. Up to 4993 conditions per place. [2023-08-30 19:40:39,599 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 854 selfloop transitions, 1788 changer transitions 551/3203 dead transitions. [2023-08-30 19:40:39,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 3203 transitions, 68031 flow [2023-08-30 19:40:39,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-08-30 19:40:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-08-30 19:40:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 9354 transitions. [2023-08-30 19:40:39,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4286107038123167 [2023-08-30 19:40:39,610 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 9354 transitions. [2023-08-30 19:40:39,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 9354 transitions. [2023-08-30 19:40:39,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:39,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 9354 transitions. [2023-08-30 19:40:39,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 75.43548387096774) internal successors, (9354), 124 states have internal predecessors, (9354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:39,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 176.0) internal successors, (22000), 125 states have internal predecessors, (22000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:39,642 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 176.0) internal successors, (22000), 125 states have internal predecessors, (22000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:39,642 INFO L175 Difference]: Start difference. First operand has 361 places, 978 transitions, 18839 flow. Second operand 124 states and 9354 transitions. [2023-08-30 19:40:39,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 3203 transitions, 68031 flow [2023-08-30 19:40:47,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 3203 transitions, 57701 flow, removed 4100 selfloop flow, removed 42 redundant places. [2023-08-30 19:40:47,876 INFO L231 Difference]: Finished difference. Result has 461 places, 2282 transitions, 45651 flow [2023-08-30 19:40:47,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=16379, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=686, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=45651, PETRI_PLACES=461, PETRI_TRANSITIONS=2282} [2023-08-30 19:40:47,877 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 431 predicate places. [2023-08-30 19:40:47,878 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 2282 transitions, 45651 flow [2023-08-30 19:40:47,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 72.26923076923077) internal successors, (1879), 26 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:47,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:47,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:47,884 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 19:40:48,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:48,084 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:40:48,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:48,085 INFO L85 PathProgramCache]: Analyzing trace with hash 734606202, now seen corresponding path program 6 times [2023-08-30 19:40:48,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:48,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538933274] [2023-08-30 19:40:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:48,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:48,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:48,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538933274] [2023-08-30 19:40:48,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538933274] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:48,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608558502] [2023-08-30 19:40:48,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:40:48,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:48,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:48,610 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 19:40:48,612 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 19:40:48,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 19:40:48,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:48,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 19:40:48,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:49,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:49,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608558502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:49,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:49,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-08-30 19:40:49,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991443850] [2023-08-30 19:40:49,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:49,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:40:49,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:40:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:40:49,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 176 [2023-08-30 19:40:49,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 2282 transitions, 45651 flow. Second operand has 25 states, 25 states have (on average 69.64) internal successors, (1741), 25 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:49,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:49,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 176 [2023-08-30 19:40:49,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:41:03,111 INFO L130 PetriNetUnfolder]: 12844/21841 cut-off events. [2023-08-30 19:41:03,111 INFO L131 PetriNetUnfolder]: For 392636/392636 co-relation queries the response was YES. [2023-08-30 19:41:03,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194036 conditions, 21841 events. 12844/21841 cut-off events. For 392636/392636 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 164585 event pairs, 321 based on Foata normal form. 448/22289 useless extension candidates. Maximal degree in co-relation 193843. Up to 8660 conditions per place. [2023-08-30 19:41:03,482 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 1884 selfloop transitions, 1274 changer transitions 528/3686 dead transitions. [2023-08-30 19:41:03,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 3686 transitions, 79623 flow [2023-08-30 19:41:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-08-30 19:41:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-08-30 19:41:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 6679 transitions. [2023-08-30 19:41:03,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41248764822134387 [2023-08-30 19:41:03,490 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 6679 transitions. [2023-08-30 19:41:03,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 6679 transitions. [2023-08-30 19:41:03,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:41:03,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 6679 transitions. [2023-08-30 19:41:03,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 72.59782608695652) internal successors, (6679), 92 states have internal predecessors, (6679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:03,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 176.0) internal successors, (16368), 93 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:03,512 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 176.0) internal successors, (16368), 93 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:03,513 INFO L175 Difference]: Start difference. First operand has 461 places, 2282 transitions, 45651 flow. Second operand 92 states and 6679 transitions. [2023-08-30 19:41:03,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 3686 transitions, 79623 flow [2023-08-30 19:41:19,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 3686 transitions, 76931 flow, removed 1270 selfloop flow, removed 49 redundant places. [2023-08-30 19:41:19,914 INFO L231 Difference]: Finished difference. Result has 523 places, 2890 transitions, 61182 flow [2023-08-30 19:41:19,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=43910, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=754, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=61182, PETRI_PLACES=523, PETRI_TRANSITIONS=2890} [2023-08-30 19:41:19,917 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 493 predicate places. [2023-08-30 19:41:19,917 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 2890 transitions, 61182 flow [2023-08-30 19:41:19,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 69.64) internal successors, (1741), 25 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:19,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:41:19,918 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:41:19,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 19:41:20,123 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,SelfDestructingSolverStorable17 [2023-08-30 19:41:20,124 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:41:20,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:41:20,124 INFO L85 PathProgramCache]: Analyzing trace with hash 729794018, now seen corresponding path program 7 times [2023-08-30 19:41:20,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:41:20,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577537173] [2023-08-30 19:41:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:41:20,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:41:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:20,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:41:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577537173] [2023-08-30 19:41:20,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577537173] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:41:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105371988] [2023-08-30 19:41:20,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:41:20,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:20,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:41:20,801 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 19:41:20,808 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 19:41:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:20,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 19:41:20,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:41:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:21,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:41:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:21,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105371988] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:41:21,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:41:21,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-08-30 19:41:21,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888206925] [2023-08-30 19:41:21,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:41:21,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:41:21,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:41:21,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:41:21,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:41:21,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 176 [2023-08-30 19:41:21,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 2890 transitions, 61182 flow. Second operand has 30 states, 30 states have (on average 67.9) internal successors, (2037), 30 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:21,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:41:21,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 176 [2023-08-30 19:41:21,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:41:46,856 INFO L130 PetriNetUnfolder]: 17137/29428 cut-off events. [2023-08-30 19:41:46,856 INFO L131 PetriNetUnfolder]: For 920114/920114 co-relation queries the response was YES. [2023-08-30 19:41:47,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288487 conditions, 29428 events. 17137/29428 cut-off events. For 920114/920114 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 235352 event pairs, 308 based on Foata normal form. 658/30086 useless extension candidates. Maximal degree in co-relation 288079. Up to 8172 conditions per place. [2023-08-30 19:41:47,492 INFO L137 encePairwiseOnDemand]: 166/176 looper letters, 1799 selfloop transitions, 2492 changer transitions 775/5066 dead transitions. [2023-08-30 19:41:47,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 5066 transitions, 115675 flow [2023-08-30 19:41:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2023-08-30 19:41:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2023-08-30 19:41:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 10729 transitions. [2023-08-30 19:41:47,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064015151515151 [2023-08-30 19:41:47,503 INFO L72 ComplementDD]: Start complementDD. Operand 150 states and 10729 transitions. [2023-08-30 19:41:47,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 10729 transitions. [2023-08-30 19:41:47,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:41:47,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 150 states and 10729 transitions. [2023-08-30 19:41:47,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 151 states, 150 states have (on average 71.52666666666667) internal successors, (10729), 150 states have internal predecessors, (10729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:47,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 151 states, 151 states have (on average 176.0) internal successors, (26576), 151 states have internal predecessors, (26576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:47,538 INFO L81 ComplementDD]: Finished complementDD. Result has 151 states, 151 states have (on average 176.0) internal successors, (26576), 151 states have internal predecessors, (26576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:47,538 INFO L175 Difference]: Start difference. First operand has 523 places, 2890 transitions, 61182 flow. Second operand 150 states and 10729 transitions. [2023-08-30 19:41:47,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 5066 transitions, 115675 flow [2023-08-30 19:42:19,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 5066 transitions, 112180 flow, removed 1701 selfloop flow, removed 45 redundant places. [2023-08-30 19:42:19,276 INFO L231 Difference]: Finished difference. Result has 677 places, 3881 transitions, 91180 flow [2023-08-30 19:42:19,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=59951, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1614, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=991, PETRI_DIFFERENCE_SUBTRAHEND_STATES=150, PETRI_FLOW=91180, PETRI_PLACES=677, PETRI_TRANSITIONS=3881} [2023-08-30 19:42:19,279 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 647 predicate places. [2023-08-30 19:42:19,279 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 3881 transitions, 91180 flow [2023-08-30 19:42:19,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 67.9) internal successors, (2037), 30 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:19,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:42:19,280 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:42:19,289 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 19:42:19,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:42:19,486 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:42:19,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:42:19,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2138623070, now seen corresponding path program 8 times [2023-08-30 19:42:19,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:42:19,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286935042] [2023-08-30 19:42:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:42:19,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:42:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:42:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:42:19,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:42:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286935042] [2023-08-30 19:42:19,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286935042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:42:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097231394] [2023-08-30 19:42:19,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:42:19,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:42:19,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:42:19,999 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 19:42:20,001 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 19:42:20,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:42:20,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:42:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 19:42:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:42:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:42:20,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:42:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:42:20,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097231394] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:42:20,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:42:20,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-30 19:42:20,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344843645] [2023-08-30 19:42:20,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:42:20,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 19:42:20,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:42:20,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 19:42:20,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:42:20,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-08-30 19:42:20,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 3881 transitions, 91180 flow. Second operand has 26 states, 26 states have (on average 72.34615384615384) internal successors, (1881), 26 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:20,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:42:20,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-08-30 19:42:20,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:43:13,279 INFO L130 PetriNetUnfolder]: 28693/49585 cut-off events. [2023-08-30 19:43:13,280 INFO L131 PetriNetUnfolder]: For 2949205/2949207 co-relation queries the response was YES. [2023-08-30 19:43:15,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571897 conditions, 49585 events. 28693/49585 cut-off events. For 2949205/2949207 co-relation queries the response was YES. Maximal size of possible extension queue 2166. Compared 434078 event pairs, 708 based on Foata normal form. 1454/51037 useless extension candidates. Maximal degree in co-relation 571424. Up to 12135 conditions per place. [2023-08-30 19:43:15,687 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 2792 selfloop transitions, 3595 changer transitions 2027/8424 dead transitions. [2023-08-30 19:43:15,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 8424 transitions, 217806 flow [2023-08-30 19:43:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2023-08-30 19:43:15,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2023-08-30 19:43:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 12929 transitions. [2023-08-30 19:43:15,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42959197235513025 [2023-08-30 19:43:15,697 INFO L72 ComplementDD]: Start complementDD. Operand 171 states and 12929 transitions. [2023-08-30 19:43:15,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 171 states and 12929 transitions. [2023-08-30 19:43:15,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:43:15,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 171 states and 12929 transitions. [2023-08-30 19:43:15,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 172 states, 171 states have (on average 75.60818713450293) internal successors, (12929), 171 states have internal predecessors, (12929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:15,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 172 states, 172 states have (on average 176.0) internal successors, (30272), 172 states have internal predecessors, (30272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:15,733 INFO L81 ComplementDD]: Finished complementDD. Result has 172 states, 172 states have (on average 176.0) internal successors, (30272), 172 states have internal predecessors, (30272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:15,733 INFO L175 Difference]: Start difference. First operand has 677 places, 3881 transitions, 91180 flow. Second operand 171 states and 12929 transitions. [2023-08-30 19:43:15,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 8424 transitions, 217806 flow [2023-08-30 19:45:18,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 8424 transitions, 208378 flow, removed 4636 selfloop flow, removed 80 redundant places. [2023-08-30 19:45:18,166 INFO L231 Difference]: Finished difference. Result has 806 places, 5934 transitions, 150852 flow [2023-08-30 19:45:18,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=88463, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1840, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=171, PETRI_FLOW=150852, PETRI_PLACES=806, PETRI_TRANSITIONS=5934} [2023-08-30 19:45:18,168 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 776 predicate places. [2023-08-30 19:45:18,168 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 5934 transitions, 150852 flow [2023-08-30 19:45:18,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 72.34615384615384) internal successors, (1881), 26 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:45:18,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:45:18,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:45:18,173 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 19:45:18,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:45:18,370 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:45:18,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:45:18,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1553467846, now seen corresponding path program 9 times [2023-08-30 19:45:18,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:45:18,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708682505] [2023-08-30 19:45:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:45:18,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:45:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:45:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:45:18,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:45:18,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708682505] [2023-08-30 19:45:18,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708682505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:45:18,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194068812] [2023-08-30 19:45:18,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:45:18,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:45:18,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:45:18,784 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 19:45:18,785 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 19:45:18,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 19:45:18,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:45:18,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:45:18,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:45:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:45:19,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:45:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:45:19,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194068812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:45:19,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:45:19,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-08-30 19:45:19,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246162908] [2023-08-30 19:45:19,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:45:19,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:45:19,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:45:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:45:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:45:19,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 176 [2023-08-30 19:45:19,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 5934 transitions, 150852 flow. Second operand has 25 states, 25 states have (on average 69.64) internal successors, (1741), 25 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:45:19,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:45:19,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 176 [2023-08-30 19:45:19,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:46:27,892 INFO L130 PetriNetUnfolder]: 31584/54305 cut-off events. [2023-08-30 19:46:27,893 INFO L131 PetriNetUnfolder]: For 1738462/1738462 co-relation queries the response was YES. [2023-08-30 19:46:31,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601862 conditions, 54305 events. 31584/54305 cut-off events. For 1738462/1738462 co-relation queries the response was YES. Maximal size of possible extension queue 2222. Compared 476804 event pairs, 1001 based on Foata normal form. 792/55097 useless extension candidates. Maximal degree in co-relation 601487. Up to 22152 conditions per place. [2023-08-30 19:46:31,425 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 4606 selfloop transitions, 3058 changer transitions 843/8507 dead transitions. [2023-08-30 19:46:31,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 8507 transitions, 236681 flow [2023-08-30 19:46:31,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-30 19:46:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-30 19:46:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5151 transitions. [2023-08-30 19:46:31,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122119078104994 [2023-08-30 19:46:31,430 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5151 transitions. [2023-08-30 19:46:31,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5151 transitions. [2023-08-30 19:46:31,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:46:31,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5151 transitions. [2023-08-30 19:46:31,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 72.54929577464789) internal successors, (5151), 71 states have internal predecessors, (5151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:46:31,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 176.0) internal successors, (12672), 72 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:46:31,444 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 176.0) internal successors, (12672), 72 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:46:31,445 INFO L175 Difference]: Start difference. First operand has 806 places, 5934 transitions, 150852 flow. Second operand 71 states and 5151 transitions. [2023-08-30 19:46:31,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 8507 transitions, 236681 flow [2023-08-30 19:49:28,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 8507 transitions, 227761 flow, removed 4228 selfloop flow, removed 82 redundant places. [2023-08-30 19:49:28,321 INFO L231 Difference]: Finished difference. Result has 763 places, 7250 transitions, 191879 flow [2023-08-30 19:49:28,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=145078, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=191879, PETRI_PLACES=763, PETRI_TRANSITIONS=7250} [2023-08-30 19:49:28,325 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 733 predicate places. [2023-08-30 19:49:28,325 INFO L495 AbstractCegarLoop]: Abstraction has has 763 places, 7250 transitions, 191879 flow [2023-08-30 19:49:28,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 69.64) internal successors, (1741), 25 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:49:28,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:49:28,325 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:49:28,330 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 19:49:28,526 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,SelfDestructingSolverStorable20 [2023-08-30 19:49:28,526 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:49:28,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:49:28,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1898947804, now seen corresponding path program 10 times [2023-08-30 19:49:28,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:49:28,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70393316] [2023-08-30 19:49:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:49:28,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:49:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:49:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:49:29,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:49:29,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70393316] [2023-08-30 19:49:29,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70393316] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:49:29,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870578771] [2023-08-30 19:49:29,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:49:29,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:49:29,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:49:29,067 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 19:49:29,069 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 19:49:29,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:49:29,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:49:29,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 19:49:29,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:49:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:49:29,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:49:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:49:29,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870578771] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:49:29,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:49:29,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-30 19:49:29,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082336230] [2023-08-30 19:49:29,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:49:29,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 19:49:29,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:49:29,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 19:49:29,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:49:29,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-08-30 19:49:29,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 7250 transitions, 191879 flow. Second operand has 26 states, 26 states have (on average 72.26923076923077) internal successors, (1879), 26 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:49:29,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:49:29,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-08-30 19:49:29,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:52:04,385 INFO L130 PetriNetUnfolder]: 46563/80913 cut-off events. [2023-08-30 19:52:04,385 INFO L131 PetriNetUnfolder]: For 2946008/2946013 co-relation queries the response was YES. [2023-08-30 19:52:09,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 918404 conditions, 80913 events. 46563/80913 cut-off events. For 2946008/2946013 co-relation queries the response was YES. Maximal size of possible extension queue 3521. Compared 764498 event pairs, 1234 based on Foata normal form. 1801/82714 useless extension candidates. Maximal degree in co-relation 916300. Up to 23220 conditions per place. [2023-08-30 19:52:10,185 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 4901 selfloop transitions, 5241 changer transitions 2470/12625 dead transitions. [2023-08-30 19:52:10,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 12625 transitions, 363547 flow [2023-08-30 19:52:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2023-08-30 19:52:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2023-08-30 19:52:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 12137 transitions. [2023-08-30 19:52:10,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310014204545455 [2023-08-30 19:52:10,195 INFO L72 ComplementDD]: Start complementDD. Operand 160 states and 12137 transitions. [2023-08-30 19:52:10,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 160 states and 12137 transitions. [2023-08-30 19:52:10,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:52:10,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 160 states and 12137 transitions. [2023-08-30 19:52:10,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 161 states, 160 states have (on average 75.85625) internal successors, (12137), 160 states have internal predecessors, (12137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:52:10,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 161 states, 161 states have (on average 176.0) internal successors, (28336), 161 states have internal predecessors, (28336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:52:10,227 INFO L81 ComplementDD]: Finished complementDD. Result has 161 states, 161 states have (on average 176.0) internal successors, (28336), 161 states have internal predecessors, (28336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:52:10,228 INFO L175 Difference]: Start difference. First operand has 763 places, 7250 transitions, 191879 flow. Second operand 160 states and 12137 transitions. [2023-08-30 19:52:10,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 12625 transitions, 363547 flow Killed by 15