./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-5.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-5.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 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a --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 19:39:51,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:39:51,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:39:51,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:39:51,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:39:51,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:39:51,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:39:51,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:39:51,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:39:51,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:39:51,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:39:51,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:39:51,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:39:51,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:39:51,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:39:51,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:39:51,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:39:51,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:39:51,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:39:51,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:39:51,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:39:51,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:39:51,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:39:51,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:39:51,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:39:51,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:39:51,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:39:51,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:39:51,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:39:51,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:39:51,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:39:51,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:39:51,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:39:51,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:39:51,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:39:51,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:39:51,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:39:51,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:39:51,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:39:51,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:39:51,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:39:51,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:39:51,709 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:39:51,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:39:51,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:39:51,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:39:51,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:39:51,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:39:51,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:39:51,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:39:51,711 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:39:51,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:39:51,712 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:39:51,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:39:51,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:39:51,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:39:51,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:39:51,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:39:51,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:39:51,713 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:39:51,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:39:51,713 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:39:51,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:39:51,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:39:51,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:39:51,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:39:51,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:39:51,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:39:51,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:39:51,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:39:51,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:39:51,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:39:51,715 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:39:51,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:39:51,715 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:39:51,715 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:39:51,715 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:39:51,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:39:52,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:39:52,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:39:52,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:39:52,033 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:39:52,033 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:39:52,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-30 19:39:53,104 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:39:53,268 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:39:53,269 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-30 19:39:53,280 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1641bb67/1094711b39f54838b5e4855546622241/FLAGa7b96c308 [2023-08-30 19:39:53,289 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1641bb67/1094711b39f54838b5e4855546622241 [2023-08-30 19:39:53,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:39:53,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:39:53,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:39:53,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:39:53,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:39:53,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4c1337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53, skipping insertion in model container [2023-08-30 19:39:53,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:39:53,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:39:53,457 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-5.wvr.c[3027,3040] [2023-08-30 19:39:53,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:39:53,471 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:39:53,500 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-5.wvr.c[3027,3040] [2023-08-30 19:39:53,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:39:53,508 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:39:53,508 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:39:53,512 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:39:53,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53 WrapperNode [2023-08-30 19:39:53,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:39:53,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:39:53,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:39:53,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:39:53,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,553 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 149 [2023-08-30 19:39:53,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:39:53,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:39:53,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:39:53,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:39:53,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,588 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:39:53,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:39:53,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:39:53,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:39:53,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53" (1/1) ... [2023-08-30 19:39:53,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:39:53,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:53,619 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 19:39:53,621 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 19:39:53,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:39:53,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:39:53,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:39:53,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:39:53,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:39:53,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:39:53,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:39:53,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:39:53,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:39:53,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:39:53,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 19:39:53,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 19:39:53,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:39:53,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:39:53,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:39:53,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:39:53,664 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 19:39:53,736 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:39:53,737 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:39:53,915 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:39:54,031 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:39:54,032 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 19:39:54,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:39:54 BoogieIcfgContainer [2023-08-30 19:39:54,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:39:54,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:39:54,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:39:54,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:39:54,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:39:53" (1/3) ... [2023-08-30 19:39:54,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bc4d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:39:54, skipping insertion in model container [2023-08-30 19:39:54,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:53" (2/3) ... [2023-08-30 19:39:54,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bc4d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:39:54, skipping insertion in model container [2023-08-30 19:39:54,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:39:54" (3/3) ... [2023-08-30 19:39:54,046 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-08-30 19:39:54,051 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:39:54,057 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:39:54,057 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:39:54,057 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:39:54,119 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 19:39:54,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 109 transitions, 242 flow [2023-08-30 19:39:54,175 INFO L130 PetriNetUnfolder]: 7/106 cut-off events. [2023-08-30 19:39:54,176 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:39:54,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 7/106 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-08-30 19:39:54,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 109 transitions, 242 flow [2023-08-30 19:39:54,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 96 transitions, 210 flow [2023-08-30 19:39:54,184 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:39:54,190 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 96 transitions, 210 flow [2023-08-30 19:39:54,191 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 96 transitions, 210 flow [2023-08-30 19:39:54,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 96 transitions, 210 flow [2023-08-30 19:39:54,221 INFO L130 PetriNetUnfolder]: 7/96 cut-off events. [2023-08-30 19:39:54,221 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:39:54,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 96 events. 7/96 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-08-30 19:39:54,223 INFO L119 LiptonReduction]: Number of co-enabled transitions 1370 [2023-08-30 19:39:56,904 INFO L134 LiptonReduction]: Checked pairs total: 1979 [2023-08-30 19:39:56,904 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-30 19:39:56,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:39:56,925 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;@50875d65, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:39:56,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 19:39:56,935 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2023-08-30 19:39:56,936 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:39:56,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:56,936 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 19:39:56,937 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 19:39:56,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash -771544553, now seen corresponding path program 1 times [2023-08-30 19:39:56,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:56,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652671747] [2023-08-30 19:39:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:56,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:57,396 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 19:39:57,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:57,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652671747] [2023-08-30 19:39:57,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652671747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:57,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:57,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:39:57,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315175162] [2023-08-30 19:39:57,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:57,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:39:57,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:57,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:39:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:39:57,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 188 [2023-08-30 19:39:57,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:57,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:57,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 188 [2023-08-30 19:39:57,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:57,655 INFO L130 PetriNetUnfolder]: 348/576 cut-off events. [2023-08-30 19:39:57,656 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-08-30 19:39:57,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 576 events. 348/576 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2317 event pairs, 49 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 929. Up to 297 conditions per place. [2023-08-30 19:39:57,663 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 50 selfloop transitions, 5 changer transitions 18/75 dead transitions. [2023-08-30 19:39:57,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 75 transitions, 350 flow [2023-08-30 19:39:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:39:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:39:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 684 transitions. [2023-08-30 19:39:57,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2023-08-30 19:39:57,679 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 684 transitions. [2023-08-30 19:39:57,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 684 transitions. [2023-08-30 19:39:57,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:57,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 684 transitions. [2023-08-30 19:39:57,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:57,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:57,689 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:57,690 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 684 transitions. [2023-08-30 19:39:57,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 75 transitions, 350 flow [2023-08-30 19:39:57,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 75 transitions, 314 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 19:39:57,694 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2023-08-30 19:39:57,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, 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 19:39:57,697 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-30 19:39:57,698 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2023-08-30 19:39:57,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:57,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:57,698 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 19:39:57,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:39:57,699 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 19:39:57,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:57,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1110178059, now seen corresponding path program 2 times [2023-08-30 19:39:57,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:57,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363104687] [2023-08-30 19:39:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:57,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:57,928 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 19:39:57,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:57,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363104687] [2023-08-30 19:39:57,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363104687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:57,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:57,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:39:57,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074789747] [2023-08-30 19:39:57,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:57,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:39:57,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:57,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:39:57,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:39:57,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 188 [2023-08-30 19:39:57,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:57,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:57,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 188 [2023-08-30 19:39:57,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:58,053 INFO L130 PetriNetUnfolder]: 251/422 cut-off events. [2023-08-30 19:39:58,053 INFO L131 PetriNetUnfolder]: For 644/660 co-relation queries the response was YES. [2023-08-30 19:39:58,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 422 events. 251/422 cut-off events. For 644/660 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1529 event pairs, 23 based on Foata normal form. 24/432 useless extension candidates. Maximal degree in co-relation 841. Up to 244 conditions per place. [2023-08-30 19:39:58,056 INFO L137 encePairwiseOnDemand]: 184/188 looper letters, 34 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-08-30 19:39:58,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 248 flow [2023-08-30 19:39:58,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:39:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:39:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 391 transitions. [2023-08-30 19:39:58,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5199468085106383 [2023-08-30 19:39:58,058 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 391 transitions. [2023-08-30 19:39:58,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 391 transitions. [2023-08-30 19:39:58,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:58,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 391 transitions. [2023-08-30 19:39:58,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.75) internal successors, (391), 4 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:58,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:58,062 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:58,062 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 391 transitions. [2023-08-30 19:39:58,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 248 flow [2023-08-30 19:39:58,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 233 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 19:39:58,065 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2023-08-30 19:39:58,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, 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 19:39:58,066 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-30 19:39:58,066 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2023-08-30 19:39:58,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:58,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:58,066 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 19:39:58,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:39:58,067 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 19:39:58,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:58,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2127314941, now seen corresponding path program 3 times [2023-08-30 19:39:58,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:58,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137529479] [2023-08-30 19:39:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:58,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:58,237 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 19:39:58,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:58,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137529479] [2023-08-30 19:39:58,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137529479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:58,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:58,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:39:58,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169090048] [2023-08-30 19:39:58,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:58,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:39:58,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:58,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:39:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:39:58,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 188 [2023-08-30 19:39:58,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:58,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:58,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 188 [2023-08-30 19:39:58,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:58,332 INFO L130 PetriNetUnfolder]: 162/285 cut-off events. [2023-08-30 19:39:58,333 INFO L131 PetriNetUnfolder]: For 448/464 co-relation queries the response was YES. [2023-08-30 19:39:58,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 285 events. 162/285 cut-off events. For 448/464 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 970 event pairs, 17 based on Foata normal form. 52/335 useless extension candidates. Maximal degree in co-relation 870. Up to 117 conditions per place. [2023-08-30 19:39:58,334 INFO L137 encePairwiseOnDemand]: 182/188 looper letters, 33 selfloop transitions, 7 changer transitions 6/49 dead transitions. [2023-08-30 19:39:58,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 318 flow [2023-08-30 19:39:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:39:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:39:58,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2023-08-30 19:39:58,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085106382978724 [2023-08-30 19:39:58,336 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2023-08-30 19:39:58,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2023-08-30 19:39:58,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:58,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2023-08-30 19:39:58,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:58,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:58,339 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:58,339 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 5 states and 478 transitions. [2023-08-30 19:39:58,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 318 flow [2023-08-30 19:39:58,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:39:58,343 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 160 flow [2023-08-30 19:39:58,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-30 19:39:58,344 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2023-08-30 19:39:58,346 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 160 flow [2023-08-30 19:39:58,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:58,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:58,347 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 19:39:58,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:39:58,348 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 19:39:58,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1776338007, now seen corresponding path program 1 times [2023-08-30 19:39:58,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:58,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317166565] [2023-08-30 19:39:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:58,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:58,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:58,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317166565] [2023-08-30 19:39:58,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317166565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:58,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86405081] [2023-08-30 19:39:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:58,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:58,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:58,563 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 19:39:58,573 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 19:39:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:58,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 19:39:58,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:58,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:59,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86405081] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:59,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:59,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 19:39:59,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407474943] [2023-08-30 19:39:59,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:59,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:39:59,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:59,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:39:59,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:39:59,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 188 [2023-08-30 19:39:59,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 160 flow. Second operand has 12 states, 12 states have (on average 87.16666666666667) internal successors, (1046), 12 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:59,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:59,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 188 [2023-08-30 19:39:59,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:59,438 INFO L130 PetriNetUnfolder]: 422/744 cut-off events. [2023-08-30 19:39:59,439 INFO L131 PetriNetUnfolder]: For 2779/2834 co-relation queries the response was YES. [2023-08-30 19:39:59,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3011 conditions, 744 events. 422/744 cut-off events. For 2779/2834 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3406 event pairs, 18 based on Foata normal form. 95/828 useless extension candidates. Maximal degree in co-relation 1802. Up to 321 conditions per place. [2023-08-30 19:39:59,443 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 81 selfloop transitions, 33 changer transitions 39/157 dead transitions. [2023-08-30 19:39:59,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 157 transitions, 1189 flow [2023-08-30 19:39:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 19:39:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 19:39:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1910 transitions. [2023-08-30 19:39:59,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837892603850051 [2023-08-30 19:39:59,447 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1910 transitions. [2023-08-30 19:39:59,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1910 transitions. [2023-08-30 19:39:59,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:59,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1910 transitions. [2023-08-30 19:39:59,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 90.95238095238095) internal successors, (1910), 21 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:59,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 188.0) internal successors, (4136), 22 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:59,472 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 188.0) internal successors, (4136), 22 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:59,473 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 160 flow. Second operand 21 states and 1910 transitions. [2023-08-30 19:39:59,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 157 transitions, 1189 flow [2023-08-30 19:39:59,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 157 transitions, 1181 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 19:39:59,478 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 550 flow [2023-08-30 19:39:59,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=550, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-08-30 19:39:59,479 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2023-08-30 19:39:59,479 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 550 flow [2023-08-30 19:39:59,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.16666666666667) internal successors, (1046), 12 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:59,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:59,480 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 19:39:59,487 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 19:39:59,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:59,685 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 19:39:59,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:59,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2050961286, now seen corresponding path program 1 times [2023-08-30 19:39:59,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:59,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328021938] [2023-08-30 19:39:59,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:59,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:59,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:59,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328021938] [2023-08-30 19:39:59,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328021938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:59,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706437195] [2023-08-30 19:39:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:59,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:59,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:59,946 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 19:39:59,948 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 19:40:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:00,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 19:40:00,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:00,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:00,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706437195] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:00,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:00,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 19:40:00,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758218796] [2023-08-30 19:40:00,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:00,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:40:00,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:00,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:40:00,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:40:00,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 188 [2023-08-30 19:40:00,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 550 flow. Second operand has 11 states, 11 states have (on average 87.18181818181819) internal successors, (959), 11 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:00,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:00,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 188 [2023-08-30 19:40:00,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:00,674 INFO L130 PetriNetUnfolder]: 430/740 cut-off events. [2023-08-30 19:40:00,674 INFO L131 PetriNetUnfolder]: For 5633/5645 co-relation queries the response was YES. [2023-08-30 19:40:00,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3756 conditions, 740 events. 430/740 cut-off events. For 5633/5645 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3145 event pairs, 8 based on Foata normal form. 44/779 useless extension candidates. Maximal degree in co-relation 2681. Up to 327 conditions per place. [2023-08-30 19:40:00,679 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 61 selfloop transitions, 25 changer transitions 64/156 dead transitions. [2023-08-30 19:40:00,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 156 transitions, 1510 flow [2023-08-30 19:40:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:40:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:40:00,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1546 transitions. [2023-08-30 19:40:00,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483729662077597 [2023-08-30 19:40:00,682 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1546 transitions. [2023-08-30 19:40:00,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1546 transitions. [2023-08-30 19:40:00,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:00,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1546 transitions. [2023-08-30 19:40:00,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 90.94117647058823) internal successors, (1546), 17 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:00,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 188.0) internal successors, (3384), 18 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:00,690 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 188.0) internal successors, (3384), 18 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:00,690 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 550 flow. Second operand 17 states and 1546 transitions. [2023-08-30 19:40:00,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 156 transitions, 1510 flow [2023-08-30 19:40:00,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 156 transitions, 1138 flow, removed 174 selfloop flow, removed 10 redundant places. [2023-08-30 19:40:00,701 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 403 flow [2023-08-30 19:40:00,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=403, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-08-30 19:40:00,702 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-08-30 19:40:00,702 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 403 flow [2023-08-30 19:40:00,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 87.18181818181819) internal successors, (959), 11 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:00,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:00,703 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] [2023-08-30 19:40:00,711 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 19:40:00,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:00,908 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 19:40:00,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:00,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1700482413, now seen corresponding path program 2 times [2023-08-30 19:40:00,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:00,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555487108] [2023-08-30 19:40:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:00,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:01,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:01,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555487108] [2023-08-30 19:40:01,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555487108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:01,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387861669] [2023-08-30 19:40:01,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:40:01,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:01,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:01,188 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 19:40:01,228 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 19:40:01,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:40:01,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:01,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 19:40:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:01,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:01,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387861669] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:01,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:01,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 19:40:01,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774655860] [2023-08-30 19:40:01,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:01,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:40:01,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:01,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:40:01,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:40:02,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 188 [2023-08-30 19:40:02,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 403 flow. Second operand has 18 states, 18 states have (on average 86.61111111111111) internal successors, (1559), 18 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:02,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:02,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 188 [2023-08-30 19:40:02,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:03,074 INFO L130 PetriNetUnfolder]: 830/1452 cut-off events. [2023-08-30 19:40:03,075 INFO L131 PetriNetUnfolder]: For 8077/8186 co-relation queries the response was YES. [2023-08-30 19:40:03,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7061 conditions, 1452 events. 830/1452 cut-off events. For 8077/8186 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7349 event pairs, 22 based on Foata normal form. 127/1541 useless extension candidates. Maximal degree in co-relation 6285. Up to 596 conditions per place. [2023-08-30 19:40:03,082 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 138 selfloop transitions, 65 changer transitions 100/309 dead transitions. [2023-08-30 19:40:03,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 309 transitions, 2906 flow [2023-08-30 19:40:03,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 19:40:03,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 19:40:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3538 transitions. [2023-08-30 19:40:03,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48254228041462083 [2023-08-30 19:40:03,089 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3538 transitions. [2023-08-30 19:40:03,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3538 transitions. [2023-08-30 19:40:03,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:03,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3538 transitions. [2023-08-30 19:40:03,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 90.71794871794872) internal successors, (3538), 39 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:03,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:03,104 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:03,104 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 403 flow. Second operand 39 states and 3538 transitions. [2023-08-30 19:40:03,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 309 transitions, 2906 flow [2023-08-30 19:40:03,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 309 transitions, 2466 flow, removed 167 selfloop flow, removed 12 redundant places. [2023-08-30 19:40:03,122 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 869 flow [2023-08-30 19:40:03,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=869, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-08-30 19:40:03,123 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2023-08-30 19:40:03,123 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 869 flow [2023-08-30 19:40:03,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 86.61111111111111) internal successors, (1559), 18 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:03,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:03,124 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 19:40:03,129 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 19:40:03,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:03,329 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 19:40:03,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:03,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1615993566, now seen corresponding path program 1 times [2023-08-30 19:40:03,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:03,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974412853] [2023-08-30 19:40:03,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:03,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:03,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:03,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974412853] [2023-08-30 19:40:03,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974412853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:03,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164578203] [2023-08-30 19:40:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:03,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:03,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:03,598 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 19:40:03,600 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 19:40:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:03,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 19:40:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:03,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:04,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164578203] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:04,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:04,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 19:40:04,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981524548] [2023-08-30 19:40:04,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:04,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:40:04,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:04,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:40:04,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:40:04,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:40:04,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 869 flow. Second operand has 19 states, 19 states have (on average 84.57894736842105) internal successors, (1607), 19 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:04,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:04,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:40:04,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:05,512 INFO L130 PetriNetUnfolder]: 1005/1811 cut-off events. [2023-08-30 19:40:05,512 INFO L131 PetriNetUnfolder]: For 10765/10800 co-relation queries the response was YES. [2023-08-30 19:40:05,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8782 conditions, 1811 events. 1005/1811 cut-off events. For 10765/10800 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9749 event pairs, 0 based on Foata normal form. 93/1896 useless extension candidates. Maximal degree in co-relation 8198. Up to 655 conditions per place. [2023-08-30 19:40:05,522 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 148 selfloop transitions, 90 changer transitions 117/363 dead transitions. [2023-08-30 19:40:05,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 363 transitions, 3442 flow [2023-08-30 19:40:05,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 19:40:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 19:40:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3468 transitions. [2023-08-30 19:40:05,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47299509001636664 [2023-08-30 19:40:05,528 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3468 transitions. [2023-08-30 19:40:05,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3468 transitions. [2023-08-30 19:40:05,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:05,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3468 transitions. [2023-08-30 19:40:05,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 88.92307692307692) internal successors, (3468), 39 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:05,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:05,542 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:05,542 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 869 flow. Second operand 39 states and 3468 transitions. [2023-08-30 19:40:05,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 363 transitions, 3442 flow [2023-08-30 19:40:05,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 363 transitions, 2686 flow, removed 331 selfloop flow, removed 14 redundant places. [2023-08-30 19:40:05,577 INFO L231 Difference]: Finished difference. Result has 119 places, 134 transitions, 1268 flow [2023-08-30 19:40:05,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1268, PETRI_PLACES=119, PETRI_TRANSITIONS=134} [2023-08-30 19:40:05,578 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2023-08-30 19:40:05,578 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 134 transitions, 1268 flow [2023-08-30 19:40:05,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 84.57894736842105) internal successors, (1607), 19 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:05,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:05,579 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 19:40:05,596 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 19:40:05,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:05,784 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 19:40:05,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:05,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1081110094, now seen corresponding path program 2 times [2023-08-30 19:40:05,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:05,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344138253] [2023-08-30 19:40:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:05,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:06,094 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 19:40:06,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:06,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344138253] [2023-08-30 19:40:06,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344138253] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:06,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773586727] [2023-08-30 19:40:06,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:40:06,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:06,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:06,099 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 19:40:06,126 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 19:40:06,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:40:06,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:06,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 19:40:06,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:06,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:06,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773586727] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:06,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:06,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 19:40:06,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383919328] [2023-08-30 19:40:06,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:06,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:40:06,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:06,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:40:06,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:40:06,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-30 19:40:06,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 134 transitions, 1268 flow. Second operand has 18 states, 18 states have (on average 82.05555555555556) internal successors, (1477), 18 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:06,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:06,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-30 19:40:06,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:08,501 INFO L130 PetriNetUnfolder]: 1731/2800 cut-off events. [2023-08-30 19:40:08,501 INFO L131 PetriNetUnfolder]: For 13061/13061 co-relation queries the response was YES. [2023-08-30 19:40:08,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13074 conditions, 2800 events. 1731/2800 cut-off events. For 13061/13061 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13588 event pairs, 41 based on Foata normal form. 144/2944 useless extension candidates. Maximal degree in co-relation 12547. Up to 691 conditions per place. [2023-08-30 19:40:08,518 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 188 selfloop transitions, 93 changer transitions 187/468 dead transitions. [2023-08-30 19:40:08,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 468 transitions, 4641 flow [2023-08-30 19:40:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 19:40:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 19:40:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4376 transitions. [2023-08-30 19:40:08,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45640383813099705 [2023-08-30 19:40:08,525 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4376 transitions. [2023-08-30 19:40:08,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4376 transitions. [2023-08-30 19:40:08,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:08,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4376 transitions. [2023-08-30 19:40:08,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 85.80392156862744) internal successors, (4376), 51 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:08,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 188.0) internal successors, (9776), 52 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:08,551 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 188.0) internal successors, (9776), 52 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:08,551 INFO L175 Difference]: Start difference. First operand has 119 places, 134 transitions, 1268 flow. Second operand 51 states and 4376 transitions. [2023-08-30 19:40:08,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 468 transitions, 4641 flow [2023-08-30 19:40:08,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 468 transitions, 4056 flow, removed 175 selfloop flow, removed 22 redundant places. [2023-08-30 19:40:08,603 INFO L231 Difference]: Finished difference. Result has 163 places, 161 transitions, 1686 flow [2023-08-30 19:40:08,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1686, PETRI_PLACES=163, PETRI_TRANSITIONS=161} [2023-08-30 19:40:08,605 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2023-08-30 19:40:08,605 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 161 transitions, 1686 flow [2023-08-30 19:40:08,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 82.05555555555556) internal successors, (1477), 18 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:08,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:08,606 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] [2023-08-30 19:40:08,619 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 19:40:08,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:08,811 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 19:40:08,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash 364047418, now seen corresponding path program 2 times [2023-08-30 19:40:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:08,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791729981] [2023-08-30 19:40:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:09,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:09,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791729981] [2023-08-30 19:40:09,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791729981] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:09,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83030035] [2023-08-30 19:40:09,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:40:09,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:09,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:09,137 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 19:40:09,149 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 19:40:09,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:40:09,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:09,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 19:40:09,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:09,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:09,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83030035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:09,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:09,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 19:40:09,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787517495] [2023-08-30 19:40:09,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:09,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:40:09,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:09,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:40:09,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:40:09,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 188 [2023-08-30 19:40:09,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 161 transitions, 1686 flow. Second operand has 17 states, 17 states have (on average 84.29411764705883) internal successors, (1433), 17 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:09,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:09,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 188 [2023-08-30 19:40:09,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:11,517 INFO L130 PetriNetUnfolder]: 2002/3239 cut-off events. [2023-08-30 19:40:11,517 INFO L131 PetriNetUnfolder]: For 48926/48926 co-relation queries the response was YES. [2023-08-30 19:40:11,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18451 conditions, 3239 events. 2002/3239 cut-off events. For 48926/48926 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16164 event pairs, 59 based on Foata normal form. 104/3343 useless extension candidates. Maximal degree in co-relation 17317. Up to 1026 conditions per place. [2023-08-30 19:40:11,540 INFO L137 encePairwiseOnDemand]: 178/188 looper letters, 212 selfloop transitions, 93 changer transitions 165/470 dead transitions. [2023-08-30 19:40:11,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 470 transitions, 5842 flow [2023-08-30 19:40:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 19:40:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 19:40:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4302 transitions. [2023-08-30 19:40:11,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46699956578376034 [2023-08-30 19:40:11,544 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4302 transitions. [2023-08-30 19:40:11,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4302 transitions. [2023-08-30 19:40:11,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:11,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4302 transitions. [2023-08-30 19:40:11,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 87.79591836734694) internal successors, (4302), 49 states have internal predecessors, (4302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:11,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 188.0) internal successors, (9400), 50 states have internal predecessors, (9400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:11,555 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 188.0) internal successors, (9400), 50 states have internal predecessors, (9400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:11,556 INFO L175 Difference]: Start difference. First operand has 163 places, 161 transitions, 1686 flow. Second operand 49 states and 4302 transitions. [2023-08-30 19:40:11,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 470 transitions, 5842 flow [2023-08-30 19:40:11,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 470 transitions, 4865 flow, removed 471 selfloop flow, removed 28 redundant places. [2023-08-30 19:40:11,700 INFO L231 Difference]: Finished difference. Result has 184 places, 198 transitions, 2215 flow [2023-08-30 19:40:11,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2215, PETRI_PLACES=184, PETRI_TRANSITIONS=198} [2023-08-30 19:40:11,701 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2023-08-30 19:40:11,701 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 198 transitions, 2215 flow [2023-08-30 19:40:11,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 84.29411764705883) internal successors, (1433), 17 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:11,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:11,702 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 19:40:11,713 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 19:40:11,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:11,908 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 19:40:11,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:11,909 INFO L85 PathProgramCache]: Analyzing trace with hash 563170391, now seen corresponding path program 3 times [2023-08-30 19:40:11,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:11,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130535702] [2023-08-30 19:40:11,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:11,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:12,268 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 19:40:12,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:12,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130535702] [2023-08-30 19:40:12,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130535702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:12,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046543614] [2023-08-30 19:40:12,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:40:12,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:12,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:12,269 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 19:40:12,272 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 19:40:12,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 19:40:12,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:12,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 19:40:12,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:12,535 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 19:40:12,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:13,251 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 19:40:13,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046543614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:13,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:13,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 19:40:13,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261734290] [2023-08-30 19:40:13,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:13,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:40:13,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:13,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:40:13,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:40:13,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:40:13,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 198 transitions, 2215 flow. Second operand has 21 states, 21 states have (on average 84.61904761904762) internal successors, (1777), 21 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:13,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:13,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:40:13,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:15,486 INFO L130 PetriNetUnfolder]: 1898/3370 cut-off events. [2023-08-30 19:40:15,487 INFO L131 PetriNetUnfolder]: For 111673/111990 co-relation queries the response was YES. [2023-08-30 19:40:15,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25623 conditions, 3370 events. 1898/3370 cut-off events. For 111673/111990 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20375 event pairs, 8 based on Foata normal form. 219/3537 useless extension candidates. Maximal degree in co-relation 24101. Up to 881 conditions per place. [2023-08-30 19:40:15,511 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 247 selfloop transitions, 152 changer transitions 143/558 dead transitions. [2023-08-30 19:40:15,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 558 transitions, 8423 flow [2023-08-30 19:40:15,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-30 19:40:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-30 19:40:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4601 transitions. [2023-08-30 19:40:15,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47064238952536824 [2023-08-30 19:40:15,528 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4601 transitions. [2023-08-30 19:40:15,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4601 transitions. [2023-08-30 19:40:15,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:15,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4601 transitions. [2023-08-30 19:40:15,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 88.48076923076923) internal successors, (4601), 52 states have internal predecessors, (4601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:15,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 188.0) internal successors, (9964), 53 states have internal predecessors, (9964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:15,545 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 188.0) internal successors, (9964), 53 states have internal predecessors, (9964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:15,546 INFO L175 Difference]: Start difference. First operand has 184 places, 198 transitions, 2215 flow. Second operand 52 states and 4601 transitions. [2023-08-30 19:40:15,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 558 transitions, 8423 flow [2023-08-30 19:40:15,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 558 transitions, 6626 flow, removed 882 selfloop flow, removed 31 redundant places. [2023-08-30 19:40:15,691 INFO L231 Difference]: Finished difference. Result has 188 places, 271 transitions, 3342 flow [2023-08-30 19:40:15,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3342, PETRI_PLACES=188, PETRI_TRANSITIONS=271} [2023-08-30 19:40:15,692 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2023-08-30 19:40:15,692 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 271 transitions, 3342 flow [2023-08-30 19:40:15,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 84.61904761904762) internal successors, (1777), 21 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:15,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:15,693 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:15,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 19:40:15,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:15,898 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 19:40:15,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:15,899 INFO L85 PathProgramCache]: Analyzing trace with hash 297215833, now seen corresponding path program 4 times [2023-08-30 19:40:15,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:15,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585852259] [2023-08-30 19:40:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:15,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:16,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:16,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585852259] [2023-08-30 19:40:16,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585852259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:16,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078961891] [2023-08-30 19:40:16,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:40:16,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:16,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:16,262 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 19:40:16,263 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 19:40:16,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:40:16,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:16,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 19:40:16,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:16,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:17,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078961891] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:17,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:17,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 19:40:17,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757107087] [2023-08-30 19:40:17,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:17,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:40:17,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:17,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:40:17,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:40:17,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:40:17,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 271 transitions, 3342 flow. Second operand has 25 states, 25 states have (on average 84.32) internal successors, (2108), 25 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:17,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:17,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:40:17,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:21,424 INFO L130 PetriNetUnfolder]: 3060/5420 cut-off events. [2023-08-30 19:40:21,424 INFO L131 PetriNetUnfolder]: For 97652/97983 co-relation queries the response was YES. [2023-08-30 19:40:21,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36830 conditions, 5420 events. 3060/5420 cut-off events. For 97652/97983 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 35551 event pairs, 34 based on Foata normal form. 311/5651 useless extension candidates. Maximal degree in co-relation 36146. Up to 1377 conditions per place. [2023-08-30 19:40:21,474 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 290 selfloop transitions, 254 changer transitions 342/901 dead transitions. [2023-08-30 19:40:21,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 901 transitions, 12498 flow [2023-08-30 19:40:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-08-30 19:40:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2023-08-30 19:40:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 6953 transitions. [2023-08-30 19:40:21,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4741543917075832 [2023-08-30 19:40:21,479 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 6953 transitions. [2023-08-30 19:40:21,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 6953 transitions. [2023-08-30 19:40:21,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:21,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 6953 transitions. [2023-08-30 19:40:21,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 89.14102564102564) internal successors, (6953), 78 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:21,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 188.0) internal successors, (14852), 79 states have internal predecessors, (14852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:21,499 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 188.0) internal successors, (14852), 79 states have internal predecessors, (14852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:21,499 INFO L175 Difference]: Start difference. First operand has 188 places, 271 transitions, 3342 flow. Second operand 78 states and 6953 transitions. [2023-08-30 19:40:21,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 901 transitions, 12498 flow [2023-08-30 19:40:21,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 901 transitions, 11020 flow, removed 730 selfloop flow, removed 14 redundant places. [2023-08-30 19:40:21,867 INFO L231 Difference]: Finished difference. Result has 255 places, 361 transitions, 5001 flow [2023-08-30 19:40:21,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=5001, PETRI_PLACES=255, PETRI_TRANSITIONS=361} [2023-08-30 19:40:21,868 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2023-08-30 19:40:21,868 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 361 transitions, 5001 flow [2023-08-30 19:40:21,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.32) internal successors, (2108), 25 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:21,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:21,869 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:21,876 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 19:40:22,074 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,SelfDestructingSolverStorable10 [2023-08-30 19:40:22,074 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 19:40:22,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:22,074 INFO L85 PathProgramCache]: Analyzing trace with hash 915863082, now seen corresponding path program 5 times [2023-08-30 19:40:22,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:22,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233812383] [2023-08-30 19:40:22,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:22,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:22,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:22,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233812383] [2023-08-30 19:40:22,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233812383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:22,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425727424] [2023-08-30 19:40:22,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:40:22,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:22,442 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 19:40:22,443 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 19:40:22,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 19:40:22,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:22,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 19:40:22,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:22,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:23,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425727424] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:23,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:23,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 19:40:23,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073284236] [2023-08-30 19:40:23,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:23,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:40:23,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:23,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:40:23,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:40:23,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:40:23,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 361 transitions, 5001 flow. Second operand has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:23,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:23,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:40:23,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:27,382 INFO L130 PetriNetUnfolder]: 3239/5749 cut-off events. [2023-08-30 19:40:27,382 INFO L131 PetriNetUnfolder]: For 171465/171808 co-relation queries the response was YES. [2023-08-30 19:40:27,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44413 conditions, 5749 events. 3239/5749 cut-off events. For 171465/171808 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 38196 event pairs, 14 based on Foata normal form. 323/5992 useless extension candidates. Maximal degree in co-relation 44253. Up to 1495 conditions per place. [2023-08-30 19:40:27,426 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 307 selfloop transitions, 257 changer transitions 271/855 dead transitions. [2023-08-30 19:40:27,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 855 transitions, 14219 flow [2023-08-30 19:40:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-30 19:40:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-30 19:40:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5741 transitions. [2023-08-30 19:40:27,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4698036006546645 [2023-08-30 19:40:27,431 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5741 transitions. [2023-08-30 19:40:27,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5741 transitions. [2023-08-30 19:40:27,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:27,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5741 transitions. [2023-08-30 19:40:27,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 88.32307692307693) internal successors, (5741), 65 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:27,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 188.0) internal successors, (12408), 66 states have internal predecessors, (12408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:27,445 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 188.0) internal successors, (12408), 66 states have internal predecessors, (12408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:27,446 INFO L175 Difference]: Start difference. First operand has 255 places, 361 transitions, 5001 flow. Second operand 65 states and 5741 transitions. [2023-08-30 19:40:27,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 855 transitions, 14219 flow [2023-08-30 19:40:28,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 855 transitions, 11271 flow, removed 1427 selfloop flow, removed 36 redundant places. [2023-08-30 19:40:28,440 INFO L231 Difference]: Finished difference. Result has 275 places, 422 transitions, 5858 flow [2023-08-30 19:40:28,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=5858, PETRI_PLACES=275, PETRI_TRANSITIONS=422} [2023-08-30 19:40:28,441 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2023-08-30 19:40:28,441 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 422 transitions, 5858 flow [2023-08-30 19:40:28,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:28,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:28,442 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:28,449 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 19:40:28,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:28,647 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 19:40:28,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:28,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1511671080, now seen corresponding path program 6 times [2023-08-30 19:40:28,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:28,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867046290] [2023-08-30 19:40:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:28,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:29,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:29,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867046290] [2023-08-30 19:40:29,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867046290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:29,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611421882] [2023-08-30 19:40:29,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:40:29,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:29,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:29,044 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 19:40:29,071 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 19:40:29,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 19:40:29,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:29,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 19:40:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:29,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:30,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611421882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:30,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:30,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 19:40:30,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646853919] [2023-08-30 19:40:30,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:30,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:40:30,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:30,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:40:30,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:40:30,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-30 19:40:30,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 422 transitions, 5858 flow. Second operand has 25 states, 25 states have (on average 81.88) internal successors, (2047), 25 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:30,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:30,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-30 19:40:30,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:36,359 INFO L130 PetriNetUnfolder]: 5581/8996 cut-off events. [2023-08-30 19:40:36,360 INFO L131 PetriNetUnfolder]: For 148695/148695 co-relation queries the response was YES. [2023-08-30 19:40:36,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55616 conditions, 8996 events. 5581/8996 cut-off events. For 148695/148695 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 54762 event pairs, 237 based on Foata normal form. 344/9340 useless extension candidates. Maximal degree in co-relation 55215. Up to 2614 conditions per place. [2023-08-30 19:40:36,436 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 437 selfloop transitions, 263 changer transitions 421/1121 dead transitions. [2023-08-30 19:40:36,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1121 transitions, 16429 flow [2023-08-30 19:40:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-08-30 19:40:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-08-30 19:40:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 8124 transitions. [2023-08-30 19:40:36,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45487122060470325 [2023-08-30 19:40:36,467 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 8124 transitions. [2023-08-30 19:40:36,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 8124 transitions. [2023-08-30 19:40:36,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:36,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 8124 transitions. [2023-08-30 19:40:36,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 85.51578947368421) internal successors, (8124), 95 states have internal predecessors, (8124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:36,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 188.0) internal successors, (18048), 96 states have internal predecessors, (18048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:36,490 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 188.0) internal successors, (18048), 96 states have internal predecessors, (18048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:36,490 INFO L175 Difference]: Start difference. First operand has 275 places, 422 transitions, 5858 flow. Second operand 95 states and 8124 transitions. [2023-08-30 19:40:36,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1121 transitions, 16429 flow [2023-08-30 19:40:37,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1121 transitions, 14493 flow, removed 782 selfloop flow, removed 43 redundant places. [2023-08-30 19:40:37,283 INFO L231 Difference]: Finished difference. Result has 352 places, 486 transitions, 7078 flow [2023-08-30 19:40:37,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=4988, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=7078, PETRI_PLACES=352, PETRI_TRANSITIONS=486} [2023-08-30 19:40:37,284 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 322 predicate places. [2023-08-30 19:40:37,284 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 486 transitions, 7078 flow [2023-08-30 19:40:37,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.88) internal successors, (2047), 25 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:37,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:37,285 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:37,293 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 19:40:37,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 19:40:37,488 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 19:40:37,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:37,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1657231966, now seen corresponding path program 7 times [2023-08-30 19:40:37,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:37,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651445790] [2023-08-30 19:40:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:37,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:37,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:37,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651445790] [2023-08-30 19:40:37,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651445790] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:37,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636143576] [2023-08-30 19:40:37,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:40:37,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:37,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:37,842 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 19:40:37,844 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 19:40:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:37,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 19:40:37,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:38,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:39,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636143576] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:39,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:39,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 19:40:39,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107903854] [2023-08-30 19:40:39,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:39,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:40:39,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:39,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:40:39,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:40:39,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:40:39,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 486 transitions, 7078 flow. Second operand has 25 states, 25 states have (on average 84.2) internal successors, (2105), 25 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:39,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:39,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:40:39,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:42,734 INFO L130 PetriNetUnfolder]: 4047/7267 cut-off events. [2023-08-30 19:40:42,734 INFO L131 PetriNetUnfolder]: For 495484/496052 co-relation queries the response was YES. [2023-08-30 19:40:42,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65705 conditions, 7267 events. 4047/7267 cut-off events. For 495484/496052 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 50528 event pairs, 140 based on Foata normal form. 304/7504 useless extension candidates. Maximal degree in co-relation 65523. Up to 1897 conditions per place. [2023-08-30 19:40:42,815 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 435 selfloop transitions, 256 changer transitions 266/975 dead transitions. [2023-08-30 19:40:42,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 975 transitions, 17064 flow [2023-08-30 19:40:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-30 19:40:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-30 19:40:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 5530 transitions. [2023-08-30 19:40:42,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744337680164722 [2023-08-30 19:40:42,834 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 5530 transitions. [2023-08-30 19:40:42,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 5530 transitions. [2023-08-30 19:40:42,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:42,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 5530 transitions. [2023-08-30 19:40:42,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 89.19354838709677) internal successors, (5530), 62 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:42,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 188.0) internal successors, (11844), 63 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:42,845 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 188.0) internal successors, (11844), 63 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:42,846 INFO L175 Difference]: Start difference. First operand has 352 places, 486 transitions, 7078 flow. Second operand 62 states and 5530 transitions. [2023-08-30 19:40:42,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 975 transitions, 17064 flow [2023-08-30 19:40:43,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 975 transitions, 13392 flow, removed 1651 selfloop flow, removed 68 redundant places. [2023-08-30 19:40:43,698 INFO L231 Difference]: Finished difference. Result has 308 places, 542 transitions, 8162 flow [2023-08-30 19:40:43,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=6248, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=8162, PETRI_PLACES=308, PETRI_TRANSITIONS=542} [2023-08-30 19:40:43,698 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2023-08-30 19:40:43,698 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 542 transitions, 8162 flow [2023-08-30 19:40:43,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.2) internal successors, (2105), 25 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:43,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:43,699 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:43,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 19:40:43,903 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,SelfDestructingSolverStorable13 [2023-08-30 19:40:43,903 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 19:40:43,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash -464045331, now seen corresponding path program 8 times [2023-08-30 19:40:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:43,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790718114] [2023-08-30 19:40:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:44,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:44,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790718114] [2023-08-30 19:40:44,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790718114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:44,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261788396] [2023-08-30 19:40:44,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:40:44,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:44,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:44,242 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 19:40:44,265 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 19:40:44,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:40:44,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:44,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 19:40:44,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:44,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:45,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261788396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:45,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:45,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 19:40:45,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732059161] [2023-08-30 19:40:45,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:45,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:40:45,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:45,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:40:45,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:40:45,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-30 19:40:45,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 542 transitions, 8162 flow. Second operand has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:45,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:45,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-30 19:40:45,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:50,757 INFO L130 PetriNetUnfolder]: 6689/10816 cut-off events. [2023-08-30 19:40:50,757 INFO L131 PetriNetUnfolder]: For 165963/165963 co-relation queries the response was YES. [2023-08-30 19:40:50,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70139 conditions, 10816 events. 6689/10816 cut-off events. For 165963/165963 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 68219 event pairs, 507 based on Foata normal form. 178/10994 useless extension candidates. Maximal degree in co-relation 69928. Up to 4582 conditions per place. [2023-08-30 19:40:50,840 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 593 selfloop transitions, 292 changer transitions 232/1117 dead transitions. [2023-08-30 19:40:50,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1117 transitions, 17800 flow [2023-08-30 19:40:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-30 19:40:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-30 19:40:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 6800 transitions. [2023-08-30 19:40:50,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45785079450579047 [2023-08-30 19:40:50,845 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 6800 transitions. [2023-08-30 19:40:50,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 6800 transitions. [2023-08-30 19:40:50,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:50,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 6800 transitions. [2023-08-30 19:40:50,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 86.07594936708861) internal successors, (6800), 79 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:50,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 188.0) internal successors, (15040), 80 states have internal predecessors, (15040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:50,889 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 188.0) internal successors, (15040), 80 states have internal predecessors, (15040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:50,889 INFO L175 Difference]: Start difference. First operand has 308 places, 542 transitions, 8162 flow. Second operand 79 states and 6800 transitions. [2023-08-30 19:40:50,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1117 transitions, 17800 flow [2023-08-30 19:40:51,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1117 transitions, 16890 flow, removed 399 selfloop flow, removed 32 redundant places. [2023-08-30 19:40:51,861 INFO L231 Difference]: Finished difference. Result has 375 places, 648 transitions, 10710 flow [2023-08-30 19:40:51,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=7658, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=10710, PETRI_PLACES=375, PETRI_TRANSITIONS=648} [2023-08-30 19:40:51,861 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 345 predicate places. [2023-08-30 19:40:51,861 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 648 transitions, 10710 flow [2023-08-30 19:40:51,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:51,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:51,869 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:51,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-30 19:40:52,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 19:40:52,073 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 19:40:52,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:52,074 INFO L85 PathProgramCache]: Analyzing trace with hash -784792479, now seen corresponding path program 9 times [2023-08-30 19:40:52,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:52,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847582251] [2023-08-30 19:40:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:52,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:52,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:52,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847582251] [2023-08-30 19:40:52,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847582251] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:52,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308718365] [2023-08-30 19:40:52,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:40:52,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:52,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:52,511 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:40:52,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 19:40:52,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 19:40:52,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:52,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 19:40:52,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:53,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:53,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308718365] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:53,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:53,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 19:40:53,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135222882] [2023-08-30 19:40:53,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:53,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:40:53,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:40:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:40:54,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-30 19:40:54,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 648 transitions, 10710 flow. Second operand has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:54,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:54,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-30 19:40:54,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:59,631 INFO L130 PetriNetUnfolder]: 7402/11955 cut-off events. [2023-08-30 19:40:59,632 INFO L131 PetriNetUnfolder]: For 473424/473424 co-relation queries the response was YES. [2023-08-30 19:40:59,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94762 conditions, 11955 events. 7402/11955 cut-off events. For 473424/473424 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 76607 event pairs, 565 based on Foata normal form. 200/12155 useless extension candidates. Maximal degree in co-relation 94584. Up to 5156 conditions per place. [2023-08-30 19:40:59,749 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 621 selfloop transitions, 286 changer transitions 285/1192 dead transitions. [2023-08-30 19:40:59,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1192 transitions, 22495 flow [2023-08-30 19:40:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-08-30 19:40:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-08-30 19:40:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 7291 transitions. [2023-08-30 19:40:59,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625782227784734 [2023-08-30 19:40:59,755 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 7291 transitions. [2023-08-30 19:40:59,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 7291 transitions. [2023-08-30 19:40:59,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:59,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 7291 transitions. [2023-08-30 19:40:59,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 85.7764705882353) internal successors, (7291), 85 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:59,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 188.0) internal successors, (16168), 86 states have internal predecessors, (16168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:59,796 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 188.0) internal successors, (16168), 86 states have internal predecessors, (16168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:59,797 INFO L175 Difference]: Start difference. First operand has 375 places, 648 transitions, 10710 flow. Second operand 85 states and 7291 transitions. [2023-08-30 19:40:59,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1192 transitions, 22495 flow [2023-08-30 19:41:01,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1192 transitions, 19754 flow, removed 1331 selfloop flow, removed 46 redundant places. [2023-08-30 19:41:01,515 INFO L231 Difference]: Finished difference. Result has 425 places, 704 transitions, 12120 flow [2023-08-30 19:41:01,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=9985, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=12120, PETRI_PLACES=425, PETRI_TRANSITIONS=704} [2023-08-30 19:41:01,517 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 395 predicate places. [2023-08-30 19:41:01,517 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 704 transitions, 12120 flow [2023-08-30 19:41:01,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:01,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:41:01,518 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:41:01,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 19:41:01,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 19:41:01,723 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 19:41:01,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:41:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2122151057, now seen corresponding path program 10 times [2023-08-30 19:41:01,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:41:01,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83176425] [2023-08-30 19:41:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:41:01,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:41:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:02,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:41:02,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83176425] [2023-08-30 19:41:02,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83176425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:41:02,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448140480] [2023-08-30 19:41:02,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:41:02,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:02,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:41:02,061 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:41:02,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 19:41:02,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:41:02,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:41:02,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 19:41:02,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:41:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:02,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:41:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:03,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448140480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:41:03,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:41:03,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 19:41:03,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510487347] [2023-08-30 19:41:03,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:41:03,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:41:03,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:41:03,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:41:03,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:41:03,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:41:03,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 704 transitions, 12120 flow. Second operand has 25 states, 25 states have (on average 84.44) internal successors, (2111), 25 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:03,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:41:03,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:41:03,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:41:08,783 INFO L130 PetriNetUnfolder]: 5407/9581 cut-off events. [2023-08-30 19:41:08,783 INFO L131 PetriNetUnfolder]: For 767021/768833 co-relation queries the response was YES. [2023-08-30 19:41:08,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100214 conditions, 9581 events. 5407/9581 cut-off events. For 767021/768833 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 69868 event pairs, 214 based on Foata normal form. 553/9937 useless extension candidates. Maximal degree in co-relation 100061. Up to 2863 conditions per place. [2023-08-30 19:41:08,915 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 567 selfloop transitions, 323 changer transitions 273/1193 dead transitions. [2023-08-30 19:41:08,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1193 transitions, 24655 flow [2023-08-30 19:41:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-30 19:41:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-30 19:41:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5650 transitions. [2023-08-30 19:41:08,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695811170212766 [2023-08-30 19:41:08,919 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5650 transitions. [2023-08-30 19:41:08,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5650 transitions. [2023-08-30 19:41:08,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:41:08,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5650 transitions. [2023-08-30 19:41:08,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 88.28125) internal successors, (5650), 64 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:08,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 188.0) internal successors, (12220), 65 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:08,930 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 188.0) internal successors, (12220), 65 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:08,930 INFO L175 Difference]: Start difference. First operand has 425 places, 704 transitions, 12120 flow. Second operand 64 states and 5650 transitions. [2023-08-30 19:41:08,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1193 transitions, 24655 flow [2023-08-30 19:41:10,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1193 transitions, 20055 flow, removed 2093 selfloop flow, removed 66 redundant places. [2023-08-30 19:41:10,710 INFO L231 Difference]: Finished difference. Result has 396 places, 758 transitions, 13330 flow [2023-08-30 19:41:10,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=11118, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=13330, PETRI_PLACES=396, PETRI_TRANSITIONS=758} [2023-08-30 19:41:10,711 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 366 predicate places. [2023-08-30 19:41:10,711 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 758 transitions, 13330 flow [2023-08-30 19:41:10,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.44) internal successors, (2111), 25 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:10,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:41:10,712 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:41:10,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 19:41:10,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:10,916 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 19:41:10,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:41:10,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1978207091, now seen corresponding path program 11 times [2023-08-30 19:41:10,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:41:10,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824365711] [2023-08-30 19:41:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:41:10,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:41:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:11,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:41:11,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824365711] [2023-08-30 19:41:11,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824365711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:41:11,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230061397] [2023-08-30 19:41:11,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:41:11,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:11,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:41:11,278 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:41:11,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 19:41:11,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 19:41:11,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:41:11,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 19:41:11,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:41:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:11,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:41:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:12,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230061397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:41:12,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:41:12,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 19:41:12,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473295988] [2023-08-30 19:41:12,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:41:12,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:41:12,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:41:12,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:41:12,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:41:12,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:41:12,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 758 transitions, 13330 flow. Second operand has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:12,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:41:12,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:41:12,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:41:16,984 INFO L130 PetriNetUnfolder]: 5815/10433 cut-off events. [2023-08-30 19:41:16,984 INFO L131 PetriNetUnfolder]: For 274125/274789 co-relation queries the response was YES. [2023-08-30 19:41:17,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83319 conditions, 10433 events. 5815/10433 cut-off events. For 274125/274789 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 76952 event pairs, 424 based on Foata normal form. 386/10714 useless extension candidates. Maximal degree in co-relation 83193. Up to 3384 conditions per place. [2023-08-30 19:41:17,208 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 692 selfloop transitions, 314 changer transitions 236/1264 dead transitions. [2023-08-30 19:41:17,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1264 transitions, 23654 flow [2023-08-30 19:41:17,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-30 19:41:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-30 19:41:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5712 transitions. [2023-08-30 19:41:17,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4747340425531915 [2023-08-30 19:41:17,240 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5712 transitions. [2023-08-30 19:41:17,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5712 transitions. [2023-08-30 19:41:17,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:41:17,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5712 transitions. [2023-08-30 19:41:17,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 89.25) internal successors, (5712), 64 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:17,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 188.0) internal successors, (12220), 65 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:17,252 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 188.0) internal successors, (12220), 65 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:17,252 INFO L175 Difference]: Start difference. First operand has 396 places, 758 transitions, 13330 flow. Second operand 64 states and 5712 transitions. [2023-08-30 19:41:17,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1264 transitions, 23654 flow [2023-08-30 19:41:18,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1264 transitions, 22031 flow, removed 755 selfloop flow, removed 35 redundant places. [2023-08-30 19:41:18,865 INFO L231 Difference]: Finished difference. Result has 412 places, 836 transitions, 15233 flow [2023-08-30 19:41:18,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=12492, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=15233, PETRI_PLACES=412, PETRI_TRANSITIONS=836} [2023-08-30 19:41:18,867 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2023-08-30 19:41:18,867 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 836 transitions, 15233 flow [2023-08-30 19:41:18,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:18,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:41:18,867 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:41:18,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 19:41:19,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 19:41:19,069 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 19:41:19,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:41:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash -535611417, now seen corresponding path program 12 times [2023-08-30 19:41:19,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:41:19,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106132557] [2023-08-30 19:41:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:41:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:41:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:19,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:41:19,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106132557] [2023-08-30 19:41:19,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106132557] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:41:19,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854900269] [2023-08-30 19:41:19,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:41:19,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:19,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:41:19,432 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:41:19,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 19:41:19,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 19:41:19,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:41:19,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:41:19,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:41:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:19,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:41:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:21,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854900269] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:41:21,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:41:21,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-30 19:41:21,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145236844] [2023-08-30 19:41:21,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:41:21,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 19:41:21,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:41:21,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 19:41:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:41:21,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:41:21,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 836 transitions, 15233 flow. Second operand has 27 states, 27 states have (on average 84.25925925925925) internal successors, (2275), 27 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:21,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:41:21,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:41:21,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:41:28,216 INFO L130 PetriNetUnfolder]: 7392/13284 cut-off events. [2023-08-30 19:41:28,217 INFO L131 PetriNetUnfolder]: For 383744/384585 co-relation queries the response was YES. [2023-08-30 19:41:28,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112165 conditions, 13284 events. 7392/13284 cut-off events. For 383744/384585 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 102230 event pairs, 264 based on Foata normal form. 481/13615 useless extension candidates. Maximal degree in co-relation 111956. Up to 2966 conditions per place. [2023-08-30 19:41:28,566 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 747 selfloop transitions, 552 changer transitions 389/1710 dead transitions. [2023-08-30 19:41:28,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1710 transitions, 32131 flow [2023-08-30 19:41:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-30 19:41:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-30 19:41:28,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8662 transitions. [2023-08-30 19:41:28,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4749945163413029 [2023-08-30 19:41:28,575 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8662 transitions. [2023-08-30 19:41:28,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8662 transitions. [2023-08-30 19:41:28,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:41:28,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8662 transitions. [2023-08-30 19:41:28,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 89.29896907216495) internal successors, (8662), 97 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:28,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 188.0) internal successors, (18424), 98 states have internal predecessors, (18424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:28,589 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 188.0) internal successors, (18424), 98 states have internal predecessors, (18424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:28,589 INFO L175 Difference]: Start difference. First operand has 412 places, 836 transitions, 15233 flow. Second operand 97 states and 8662 transitions. [2023-08-30 19:41:28,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1710 transitions, 32131 flow [2023-08-30 19:41:30,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1710 transitions, 30260 flow, removed 759 selfloop flow, removed 29 redundant places. [2023-08-30 19:41:30,533 INFO L231 Difference]: Finished difference. Result has 486 places, 1010 transitions, 19858 flow [2023-08-30 19:41:30,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=14042, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=19858, PETRI_PLACES=486, PETRI_TRANSITIONS=1010} [2023-08-30 19:41:30,534 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 456 predicate places. [2023-08-30 19:41:30,534 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 1010 transitions, 19858 flow [2023-08-30 19:41:30,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.25925925925925) internal successors, (2275), 27 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:30,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:41:30,535 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:41:30,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 19:41:30,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:30,740 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 19:41:30,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:41:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash -858648437, now seen corresponding path program 13 times [2023-08-30 19:41:30,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:41:30,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399945990] [2023-08-30 19:41:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:41:30,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:41:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:31,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:41:31,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399945990] [2023-08-30 19:41:31,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399945990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:41:31,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483107546] [2023-08-30 19:41:31,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:41:31,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:31,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:41:31,099 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:41:31,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 19:41:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:31,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:41:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:41:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:31,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:41:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:33,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483107546] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:41:33,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:41:33,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-30 19:41:33,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110072920] [2023-08-30 19:41:33,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:41:33,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 19:41:33,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:41:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 19:41:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:41:33,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:41:33,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 1010 transitions, 19858 flow. Second operand has 27 states, 27 states have (on average 84.25925925925925) internal successors, (2275), 27 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:33,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:41:33,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:41:33,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:41:41,906 INFO L130 PetriNetUnfolder]: 7897/14059 cut-off events. [2023-08-30 19:41:41,906 INFO L131 PetriNetUnfolder]: For 489922/491033 co-relation queries the response was YES. [2023-08-30 19:41:42,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128980 conditions, 14059 events. 7897/14059 cut-off events. For 489922/491033 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 108669 event pairs, 536 based on Foata normal form. 677/14533 useless extension candidates. Maximal degree in co-relation 128852. Up to 4328 conditions per place. [2023-08-30 19:41:42,070 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 890 selfloop transitions, 483 changer transitions 250/1673 dead transitions. [2023-08-30 19:41:42,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 1673 transitions, 36054 flow [2023-08-30 19:41:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-08-30 19:41:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-08-30 19:41:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 7335 transitions. [2023-08-30 19:41:42,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700717764675724 [2023-08-30 19:41:42,075 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 7335 transitions. [2023-08-30 19:41:42,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 7335 transitions. [2023-08-30 19:41:42,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:41:42,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 7335 transitions. [2023-08-30 19:41:42,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 88.37349397590361) internal successors, (7335), 83 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:42,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 188.0) internal successors, (15792), 84 states have internal predecessors, (15792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:42,088 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 188.0) internal successors, (15792), 84 states have internal predecessors, (15792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:42,089 INFO L175 Difference]: Start difference. First operand has 486 places, 1010 transitions, 19858 flow. Second operand 83 states and 7335 transitions. [2023-08-30 19:41:42,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 1673 transitions, 36054 flow [2023-08-30 19:41:46,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 1673 transitions, 32179 flow, removed 1862 selfloop flow, removed 47 redundant places. [2023-08-30 19:41:46,215 INFO L231 Difference]: Finished difference. Result has 522 places, 1182 transitions, 24013 flow [2023-08-30 19:41:46,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=18289, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=24013, PETRI_PLACES=522, PETRI_TRANSITIONS=1182} [2023-08-30 19:41:46,216 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 492 predicate places. [2023-08-30 19:41:46,216 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 1182 transitions, 24013 flow [2023-08-30 19:41:46,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.25925925925925) internal successors, (2275), 27 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:46,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:41:46,216 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:41:46,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 19:41:46,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:46,419 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 19:41:46,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:41:46,419 INFO L85 PathProgramCache]: Analyzing trace with hash -815196267, now seen corresponding path program 14 times [2023-08-30 19:41:46,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:41:46,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811173258] [2023-08-30 19:41:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:41:46,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:41:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:46,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:41:46,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811173258] [2023-08-30 19:41:46,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811173258] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:41:46,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528846831] [2023-08-30 19:41:46,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:41:46,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:46,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:41:46,974 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:41:46,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 19:41:47,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:41:47,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:41:47,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:41:47,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:41:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:47,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:41:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:49,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528846831] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:41:49,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:41:49,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 19:41:49,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875143149] [2023-08-30 19:41:49,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:41:49,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:41:49,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:41:49,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:41:49,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:41:49,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:41:49,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1182 transitions, 24013 flow. Second operand has 30 states, 30 states have (on average 83.96666666666667) internal successors, (2519), 30 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:49,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:41:49,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:41:49,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:42:01,180 INFO L130 PetriNetUnfolder]: 9716/17394 cut-off events. [2023-08-30 19:42:01,180 INFO L131 PetriNetUnfolder]: For 616003/617340 co-relation queries the response was YES. [2023-08-30 19:42:01,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156781 conditions, 17394 events. 9716/17394 cut-off events. For 616003/617340 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 141515 event pairs, 346 based on Foata normal form. 853/17998 useless extension candidates. Maximal degree in co-relation 156619. Up to 4308 conditions per place. [2023-08-30 19:42:01,365 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 949 selfloop transitions, 724 changer transitions 431/2154 dead transitions. [2023-08-30 19:42:01,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 2154 transitions, 45324 flow [2023-08-30 19:42:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-08-30 19:42:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2023-08-30 19:42:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 10260 transitions. [2023-08-30 19:42:01,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47046955245781363 [2023-08-30 19:42:01,371 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 10260 transitions. [2023-08-30 19:42:01,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 10260 transitions. [2023-08-30 19:42:01,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:42:01,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 10260 transitions. [2023-08-30 19:42:01,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 88.44827586206897) internal successors, (10260), 116 states have internal predecessors, (10260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:01,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 188.0) internal successors, (21996), 117 states have internal predecessors, (21996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:01,388 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 188.0) internal successors, (21996), 117 states have internal predecessors, (21996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:01,388 INFO L175 Difference]: Start difference. First operand has 522 places, 1182 transitions, 24013 flow. Second operand 116 states and 10260 transitions. [2023-08-30 19:42:01,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 2154 transitions, 45324 flow [2023-08-30 19:42:03,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 2154 transitions, 43861 flow, removed 694 selfloop flow, removed 29 redundant places. [2023-08-30 19:42:03,443 INFO L231 Difference]: Finished difference. Result has 622 places, 1393 transitions, 30545 flow [2023-08-30 19:42:03,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=22794, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=30545, PETRI_PLACES=622, PETRI_TRANSITIONS=1393} [2023-08-30 19:42:03,444 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 592 predicate places. [2023-08-30 19:42:03,444 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 1393 transitions, 30545 flow [2023-08-30 19:42:03,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.96666666666667) internal successors, (2519), 30 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:03,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:42:03,445 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:42:03,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 19:42:03,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:42:03,649 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 19:42:03,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:42:03,649 INFO L85 PathProgramCache]: Analyzing trace with hash 430765921, now seen corresponding path program 15 times [2023-08-30 19:42:03,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:42:03,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405444027] [2023-08-30 19:42:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:42:03,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:42:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:42:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:42:04,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:42:04,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405444027] [2023-08-30 19:42:04,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405444027] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:42:04,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323912647] [2023-08-30 19:42:04,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:42:04,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:42:04,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:42:04,217 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:42:04,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 19:42:04,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-30 19:42:04,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:42:04,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:42:04,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:42:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:42:05,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:42:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:42:07,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323912647] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:42:07,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:42:07,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 19:42:07,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561338677] [2023-08-30 19:42:07,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:42:07,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:42:07,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:42:07,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:42:07,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:42:07,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-30 19:42:07,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 1393 transitions, 30545 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:07,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:42:07,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-30 19:42:07,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:42:25,149 INFO L130 PetriNetUnfolder]: 16607/27004 cut-off events. [2023-08-30 19:42:25,150 INFO L131 PetriNetUnfolder]: For 1188496/1188496 co-relation queries the response was YES. [2023-08-30 19:42:25,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238234 conditions, 27004 events. 16607/27004 cut-off events. For 1188496/1188496 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 197778 event pairs, 1085 based on Foata normal form. 432/27436 useless extension candidates. Maximal degree in co-relation 238002. Up to 9826 conditions per place. [2023-08-30 19:42:25,528 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 1314 selfloop transitions, 728 changer transitions 533/2575 dead transitions. [2023-08-30 19:42:25,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 2575 transitions, 59306 flow [2023-08-30 19:42:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-08-30 19:42:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2023-08-30 19:42:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 12931 transitions. [2023-08-30 19:42:25,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45550937015640414 [2023-08-30 19:42:25,535 INFO L72 ComplementDD]: Start complementDD. Operand 151 states and 12931 transitions. [2023-08-30 19:42:25,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 151 states and 12931 transitions. [2023-08-30 19:42:25,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:42:25,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 151 states and 12931 transitions. [2023-08-30 19:42:25,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 152 states, 151 states have (on average 85.63576158940397) internal successors, (12931), 151 states have internal predecessors, (12931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:25,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 152 states, 152 states have (on average 188.0) internal successors, (28576), 152 states have internal predecessors, (28576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:25,556 INFO L81 ComplementDD]: Finished complementDD. Result has 152 states, 152 states have (on average 188.0) internal successors, (28576), 152 states have internal predecessors, (28576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:25,556 INFO L175 Difference]: Start difference. First operand has 622 places, 1393 transitions, 30545 flow. Second operand 151 states and 12931 transitions. [2023-08-30 19:42:25,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 2575 transitions, 59306 flow [2023-08-30 19:42:30,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 2575 transitions, 53108 flow, removed 2269 selfloop flow, removed 49 redundant places. [2023-08-30 19:42:30,427 INFO L231 Difference]: Finished difference. Result has 768 places, 1635 transitions, 36201 flow [2023-08-30 19:42:30,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=27313, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=151, PETRI_FLOW=36201, PETRI_PLACES=768, PETRI_TRANSITIONS=1635} [2023-08-30 19:42:30,428 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 738 predicate places. [2023-08-30 19:42:30,428 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 1635 transitions, 36201 flow [2023-08-30 19:42:30,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:30,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:42:30,429 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:42:30,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 19:42:30,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:42:30,633 INFO L420 AbstractCegarLoop]: === Iteration 23 === 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 19:42:30,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:42:30,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1299411541, now seen corresponding path program 16 times [2023-08-30 19:42:30,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:42:30,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90382021] [2023-08-30 19:42:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:42:30,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:42:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:42:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:42:31,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:42:31,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90382021] [2023-08-30 19:42:31,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90382021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:42:31,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364087762] [2023-08-30 19:42:31,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:42:31,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:42:31,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:42:31,356 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:42:31,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 19:42:31,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:42:31,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:42:31,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:42:31,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:42:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:42:32,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:42:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:42:33,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364087762] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:42:33,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:42:33,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 19:42:33,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801123536] [2023-08-30 19:42:33,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:42:33,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:42:33,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:42:33,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:42:33,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:42:34,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:42:34,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 1635 transitions, 36201 flow. Second operand has 30 states, 30 states have (on average 83.9) internal successors, (2517), 30 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:34,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:42:34,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:42:34,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:42:51,943 INFO L130 PetriNetUnfolder]: 12954/23226 cut-off events. [2023-08-30 19:42:51,943 INFO L131 PetriNetUnfolder]: For 4575187/4578688 co-relation queries the response was YES. [2023-08-30 19:42:52,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327468 conditions, 23226 events. 12954/23226 cut-off events. For 4575187/4578688 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 194912 event pairs, 532 based on Foata normal form. 963/23915 useless extension candidates. Maximal degree in co-relation 325855. Up to 5874 conditions per place. [2023-08-30 19:42:52,904 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 1292 selfloop transitions, 791 changer transitions 561/2704 dead transitions. [2023-08-30 19:42:52,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 808 places, 2704 transitions, 68816 flow [2023-08-30 19:42:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-08-30 19:42:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2023-08-30 19:42:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 10787 transitions. [2023-08-30 19:42:52,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47419553367329 [2023-08-30 19:42:52,910 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 10787 transitions. [2023-08-30 19:42:52,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 10787 transitions. [2023-08-30 19:42:52,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:42:52,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 10787 transitions. [2023-08-30 19:42:52,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 89.14876033057851) internal successors, (10787), 121 states have internal predecessors, (10787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:52,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 188.0) internal successors, (22936), 122 states have internal predecessors, (22936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:52,931 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 188.0) internal successors, (22936), 122 states have internal predecessors, (22936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:52,931 INFO L175 Difference]: Start difference. First operand has 768 places, 1635 transitions, 36201 flow. Second operand 121 states and 10787 transitions. [2023-08-30 19:42:52,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 808 places, 2704 transitions, 68816 flow [2023-08-30 19:43:20,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 2704 transitions, 58281 flow, removed 5224 selfloop flow, removed 99 redundant places. [2023-08-30 19:43:20,454 INFO L231 Difference]: Finished difference. Result has 760 places, 1826 transitions, 41852 flow [2023-08-30 19:43:20,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=34148, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=960, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=41852, PETRI_PLACES=760, PETRI_TRANSITIONS=1826} [2023-08-30 19:43:20,470 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 730 predicate places. [2023-08-30 19:43:20,470 INFO L495 AbstractCegarLoop]: Abstraction has has 760 places, 1826 transitions, 41852 flow [2023-08-30 19:43:20,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.9) internal successors, (2517), 30 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:20,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:43:20,471 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:43:20,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 19:43:20,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 19:43:20,671 INFO L420 AbstractCegarLoop]: === Iteration 24 === 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 19:43:20,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:43:20,671 INFO L85 PathProgramCache]: Analyzing trace with hash 807146657, now seen corresponding path program 17 times [2023-08-30 19:43:20,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:43:20,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526487623] [2023-08-30 19:43:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:43:20,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:43:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:43:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:43:21,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:43:21,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526487623] [2023-08-30 19:43:21,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526487623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:43:21,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995905192] [2023-08-30 19:43:21,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:43:21,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:43:21,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:43:21,501 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:43:21,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 19:43:21,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 19:43:21,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:43:21,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:43:21,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:43:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:43:22,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:43:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:43:23,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995905192] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:43:23,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:43:23,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 19:43:23,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69863719] [2023-08-30 19:43:23,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:43:23,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:43:23,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:43:23,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:43:23,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:43:24,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:43:24,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 1826 transitions, 41852 flow. Second operand has 30 states, 30 states have (on average 84.16666666666667) internal successors, (2525), 30 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:24,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:43:24,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:43:24,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:43:41,574 INFO L130 PetriNetUnfolder]: 13659/24346 cut-off events. [2023-08-30 19:43:41,574 INFO L131 PetriNetUnfolder]: For 1792669/1794613 co-relation queries the response was YES. [2023-08-30 19:43:41,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273373 conditions, 24346 events. 13659/24346 cut-off events. For 1792669/1794613 co-relation queries the response was YES. Maximal size of possible extension queue 1138. Compared 205465 event pairs, 504 based on Foata normal form. 1113/25086 useless extension candidates. Maximal degree in co-relation 273146. Up to 6345 conditions per place. [2023-08-30 19:43:41,968 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 1377 selfloop transitions, 921 changer transitions 481/2837 dead transitions. [2023-08-30 19:43:41,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 821 places, 2837 transitions, 70294 flow [2023-08-30 19:43:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-08-30 19:43:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2023-08-30 19:43:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 10261 transitions. [2023-08-30 19:43:41,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470515407190022 [2023-08-30 19:43:41,986 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 10261 transitions. [2023-08-30 19:43:41,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 10261 transitions. [2023-08-30 19:43:41,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:43:41,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 10261 transitions. [2023-08-30 19:43:41,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 88.45689655172414) internal successors, (10261), 116 states have internal predecessors, (10261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:42,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 188.0) internal successors, (21996), 117 states have internal predecessors, (21996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:42,002 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 188.0) internal successors, (21996), 117 states have internal predecessors, (21996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:42,002 INFO L175 Difference]: Start difference. First operand has 760 places, 1826 transitions, 41852 flow. Second operand 116 states and 10261 transitions. [2023-08-30 19:43:42,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 821 places, 2837 transitions, 70294 flow [2023-08-30 19:44:08,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 2837 transitions, 64903 flow, removed 2565 selfloop flow, removed 56 redundant places. [2023-08-30 19:44:08,710 INFO L231 Difference]: Finished difference. Result has 803 places, 1988 transitions, 47475 flow [2023-08-30 19:44:08,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=39623, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1064, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=47475, PETRI_PLACES=803, PETRI_TRANSITIONS=1988} [2023-08-30 19:44:08,712 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 773 predicate places. [2023-08-30 19:44:08,712 INFO L495 AbstractCegarLoop]: Abstraction has has 803 places, 1988 transitions, 47475 flow [2023-08-30 19:44:08,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.16666666666667) internal successors, (2525), 30 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:08,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:44:08,712 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:44:08,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 19:44:08,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 19:44:08,917 INFO L420 AbstractCegarLoop]: === Iteration 25 === 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 19:44:08,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:44:08,918 INFO L85 PathProgramCache]: Analyzing trace with hash -275210114, now seen corresponding path program 18 times [2023-08-30 19:44:08,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:44:08,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349418480] [2023-08-30 19:44:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:44:08,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:44:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:44:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:44:09,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:44:09,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349418480] [2023-08-30 19:44:09,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349418480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:44:09,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76799529] [2023-08-30 19:44:09,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:44:09,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:44:09,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:44:09,644 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:44:09,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 19:44:09,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 19:44:09,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:44:09,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:44:09,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:44:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:44:10,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:44:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:44:12,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76799529] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:44:12,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:44:12,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 19:44:12,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068506221] [2023-08-30 19:44:12,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:44:12,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:44:12,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:44:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:44:12,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:44:12,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-30 19:44:12,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 803 places, 1988 transitions, 47475 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:12,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:44:12,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-30 19:44:12,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:44:35,675 INFO L130 PetriNetUnfolder]: 21364/34655 cut-off events. [2023-08-30 19:44:35,675 INFO L131 PetriNetUnfolder]: For 1746303/1746303 co-relation queries the response was YES. [2023-08-30 19:44:36,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319123 conditions, 34655 events. 21364/34655 cut-off events. For 1746303/1746303 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 259934 event pairs, 1591 based on Foata normal form. 610/35265 useless extension candidates. Maximal degree in co-relation 318868. Up to 14042 conditions per place. [2023-08-30 19:44:36,381 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 1552 selfloop transitions, 849 changer transitions 660/3061 dead transitions. [2023-08-30 19:44:36,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 884 places, 3061 transitions, 75847 flow [2023-08-30 19:44:36,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-08-30 19:44:36,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2023-08-30 19:44:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 10704 transitions. [2023-08-30 19:44:36,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45548936170212767 [2023-08-30 19:44:36,387 INFO L72 ComplementDD]: Start complementDD. Operand 125 states and 10704 transitions. [2023-08-30 19:44:36,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 10704 transitions. [2023-08-30 19:44:36,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:44:36,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 125 states and 10704 transitions. [2023-08-30 19:44:36,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 126 states, 125 states have (on average 85.632) internal successors, (10704), 125 states have internal predecessors, (10704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:36,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 126 states, 126 states have (on average 188.0) internal successors, (23688), 126 states have internal predecessors, (23688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:36,404 INFO L81 ComplementDD]: Finished complementDD. Result has 126 states, 126 states have (on average 188.0) internal successors, (23688), 126 states have internal predecessors, (23688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:36,404 INFO L175 Difference]: Start difference. First operand has 803 places, 1988 transitions, 47475 flow. Second operand 125 states and 10704 transitions. [2023-08-30 19:44:36,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 884 places, 3061 transitions, 75847 flow [2023-08-30 19:44:49,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 831 places, 3061 transitions, 71385 flow, removed 2115 selfloop flow, removed 53 redundant places. [2023-08-30 19:44:49,440 INFO L231 Difference]: Finished difference. Result has 904 places, 2030 transitions, 49688 flow [2023-08-30 19:44:49,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=44949, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=714, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=125, PETRI_FLOW=49688, PETRI_PLACES=904, PETRI_TRANSITIONS=2030} [2023-08-30 19:44:49,442 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 874 predicate places. [2023-08-30 19:44:49,442 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 2030 transitions, 49688 flow [2023-08-30 19:44:49,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:49,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:44:49,443 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:44:49,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 19:44:49,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:44:49,647 INFO L420 AbstractCegarLoop]: === Iteration 26 === 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 19:44:49,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:44:49,648 INFO L85 PathProgramCache]: Analyzing trace with hash 400638337, now seen corresponding path program 19 times [2023-08-30 19:44:49,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:44:49,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940444784] [2023-08-30 19:44:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:44:49,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:44:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:44:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:44:50,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:44:50,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940444784] [2023-08-30 19:44:50,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940444784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:44:50,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440494524] [2023-08-30 19:44:50,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:44:50,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:44:50,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:44:50,094 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:44:50,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 19:44:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:44:50,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:44:50,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:44:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:44:50,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:44:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:44:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440494524] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:44:52,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:44:52,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 19:44:52,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048697568] [2023-08-30 19:44:52,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:44:52,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:44:52,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:44:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:44:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:44:53,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:44:53,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 2030 transitions, 49688 flow. Second operand has 30 states, 30 states have (on average 84.1) internal successors, (2523), 30 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:53,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:44:53,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:44:53,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:45:13,895 INFO L130 PetriNetUnfolder]: 15901/28575 cut-off events. [2023-08-30 19:45:13,895 INFO L131 PetriNetUnfolder]: For 4385103/4389689 co-relation queries the response was YES. [2023-08-30 19:45:14,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395416 conditions, 28575 events. 15901/28575 cut-off events. For 4385103/4389689 co-relation queries the response was YES. Maximal size of possible extension queue 1279. Compared 247918 event pairs, 658 based on Foata normal form. 1096/29358 useless extension candidates. Maximal degree in co-relation 394137. Up to 8255 conditions per place. [2023-08-30 19:45:14,547 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 1587 selfloop transitions, 964 changer transitions 458/3079 dead transitions. [2023-08-30 19:45:14,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 938 places, 3079 transitions, 84422 flow [2023-08-30 19:45:14,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-08-30 19:45:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2023-08-30 19:45:14,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 9538 transitions. [2023-08-30 19:45:14,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47414993040365877 [2023-08-30 19:45:14,558 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 9538 transitions. [2023-08-30 19:45:14,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 9538 transitions. [2023-08-30 19:45:14,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:45:14,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 9538 transitions. [2023-08-30 19:45:14,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 89.14018691588785) internal successors, (9538), 107 states have internal predecessors, (9538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:45:14,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 188.0) internal successors, (20304), 108 states have internal predecessors, (20304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:45:14,573 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 188.0) internal successors, (20304), 108 states have internal predecessors, (20304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:45:14,573 INFO L175 Difference]: Start difference. First operand has 904 places, 2030 transitions, 49688 flow. Second operand 107 states and 9538 transitions. [2023-08-30 19:45:14,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 938 places, 3079 transitions, 84422 flow [2023-08-30 19:45:40,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 845 places, 3079 transitions, 78465 flow, removed 2799 selfloop flow, removed 93 redundant places. [2023-08-30 19:45:40,726 INFO L231 Difference]: Finished difference. Result has 886 places, 2303 transitions, 59871 flow [2023-08-30 19:45:40,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=48335, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=711, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=59871, PETRI_PLACES=886, PETRI_TRANSITIONS=2303} [2023-08-30 19:45:40,727 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 856 predicate places. [2023-08-30 19:45:40,728 INFO L495 AbstractCegarLoop]: Abstraction has has 886 places, 2303 transitions, 59871 flow [2023-08-30 19:45:40,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.1) internal successors, (2523), 30 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:45:40,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:45:40,728 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:45:40,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 19:45:40,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:45:40,932 INFO L420 AbstractCegarLoop]: === Iteration 27 === 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 19:45:40,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:45:40,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1581172496, now seen corresponding path program 20 times [2023-08-30 19:45:40,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:45:40,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355279204] [2023-08-30 19:45:40,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:45:40,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:45:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:45:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:45:41,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:45:41,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355279204] [2023-08-30 19:45:41,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355279204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:45:41,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828348041] [2023-08-30 19:45:41,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:45:41,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:45:41,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:45:41,330 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:45:41,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 19:45:41,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:45:41,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:45:41,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:45:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:45:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:45:41,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:45:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:45:44,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828348041] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:45:44,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:45:44,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 19:45:44,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691626307] [2023-08-30 19:45:44,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:45:44,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:45:44,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:45:44,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:45:44,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:45:44,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-30 19:45:44,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 886 places, 2303 transitions, 59871 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:45:44,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:45:44,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-30 19:45:44,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:46:17,279 INFO L130 PetriNetUnfolder]: 26177/42514 cut-off events. [2023-08-30 19:46:17,279 INFO L131 PetriNetUnfolder]: For 2950710/2950710 co-relation queries the response was YES. [2023-08-30 19:46:18,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451543 conditions, 42514 events. 26177/42514 cut-off events. For 2950710/2950710 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 330759 event pairs, 2159 based on Foata normal form. 478/42992 useless extension candidates. Maximal degree in co-relation 450802. Up to 17754 conditions per place. [2023-08-30 19:46:18,627 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 1931 selfloop transitions, 1084 changer transitions 589/3604 dead transitions. [2023-08-30 19:46:18,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1005 places, 3604 transitions, 100701 flow [2023-08-30 19:46:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2023-08-30 19:46:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2023-08-30 19:46:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 13356 transitions. [2023-08-30 19:46:18,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4554009819967267 [2023-08-30 19:46:18,633 INFO L72 ComplementDD]: Start complementDD. Operand 156 states and 13356 transitions. [2023-08-30 19:46:18,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 156 states and 13356 transitions. [2023-08-30 19:46:18,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:46:18,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 156 states and 13356 transitions. [2023-08-30 19:46:18,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 157 states, 156 states have (on average 85.61538461538461) internal successors, (13356), 156 states have internal predecessors, (13356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:46:18,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 157 states, 157 states have (on average 188.0) internal successors, (29516), 157 states have internal predecessors, (29516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:46:18,790 INFO L81 ComplementDD]: Finished complementDD. Result has 157 states, 157 states have (on average 188.0) internal successors, (29516), 157 states have internal predecessors, (29516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:46:18,790 INFO L175 Difference]: Start difference. First operand has 886 places, 2303 transitions, 59871 flow. Second operand 156 states and 13356 transitions. [2023-08-30 19:46:18,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1005 places, 3604 transitions, 100701 flow [2023-08-30 19:46:54,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 955 places, 3604 transitions, 95550 flow, removed 2490 selfloop flow, removed 50 redundant places. [2023-08-30 19:46:54,150 INFO L231 Difference]: Finished difference. Result has 1054 places, 2568 transitions, 70036 flow [2023-08-30 19:46:54,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=56992, PETRI_DIFFERENCE_MINUEND_PLACES=800, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=831, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=156, PETRI_FLOW=70036, PETRI_PLACES=1054, PETRI_TRANSITIONS=2568} [2023-08-30 19:46:54,151 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1024 predicate places. [2023-08-30 19:46:54,152 INFO L495 AbstractCegarLoop]: Abstraction has has 1054 places, 2568 transitions, 70036 flow [2023-08-30 19:46:54,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:46:54,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:46:54,152 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:46:54,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-30 19:46:54,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 19:46:54,356 INFO L420 AbstractCegarLoop]: === Iteration 28 === 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 19:46:54,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:46:54,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1670714576, now seen corresponding path program 21 times [2023-08-30 19:46:54,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:46:54,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299594903] [2023-08-30 19:46:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:46:54,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:46:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:46:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:46:54,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:46:54,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299594903] [2023-08-30 19:46:54,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299594903] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:46:54,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731976774] [2023-08-30 19:46:54,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:46:54,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:46:54,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:46:54,837 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:46:54,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 19:46:54,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-08-30 19:46:54,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:46:54,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:46:54,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:46:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:46:55,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:46:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:46:57,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731976774] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:46:57,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:46:57,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 19:46:57,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240464562] [2023-08-30 19:46:57,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:46:57,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:46:57,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:46:57,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:46:57,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:46:57,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-30 19:46:57,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1054 places, 2568 transitions, 70036 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:46:57,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:46:57,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-30 19:46:57,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:47:36,167 INFO L130 PetriNetUnfolder]: 28007/45386 cut-off events. [2023-08-30 19:47:36,167 INFO L131 PetriNetUnfolder]: For 9721797/9721797 co-relation queries the response was YES. [2023-08-30 19:47:38,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608466 conditions, 45386 events. 28007/45386 cut-off events. For 9721797/9721797 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 355309 event pairs, 2423 based on Foata normal form. 812/46198 useless extension candidates. Maximal degree in co-relation 607950. Up to 19158 conditions per place. [2023-08-30 19:47:38,503 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 1975 selfloop transitions, 1017 changer transitions 857/3849 dead transitions. [2023-08-30 19:47:38,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1110 places, 3849 transitions, 116127 flow [2023-08-30 19:47:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2023-08-30 19:47:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2023-08-30 19:47:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 12387 transitions. [2023-08-30 19:47:38,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544020542920029 [2023-08-30 19:47:38,509 INFO L72 ComplementDD]: Start complementDD. Operand 145 states and 12387 transitions. [2023-08-30 19:47:38,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 145 states and 12387 transitions. [2023-08-30 19:47:38,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:47:38,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 145 states and 12387 transitions. [2023-08-30 19:47:38,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 146 states, 145 states have (on average 85.42758620689655) internal successors, (12387), 145 states have internal predecessors, (12387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:38,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 146 states, 146 states have (on average 188.0) internal successors, (27448), 146 states have internal predecessors, (27448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:38,542 INFO L81 ComplementDD]: Finished complementDD. Result has 146 states, 146 states have (on average 188.0) internal successors, (27448), 146 states have internal predecessors, (27448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:38,542 INFO L175 Difference]: Start difference. First operand has 1054 places, 2568 transitions, 70036 flow. Second operand 145 states and 12387 transitions. [2023-08-30 19:47:38,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1110 places, 3849 transitions, 116127 flow [2023-08-30 19:48:50,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1013 places, 3849 transitions, 105767 flow, removed 5107 selfloop flow, removed 97 redundant places. [2023-08-30 19:48:50,186 INFO L231 Difference]: Finished difference. Result has 1106 places, 2623 transitions, 73299 flow [2023-08-30 19:48:50,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=66374, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=849, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=145, PETRI_FLOW=73299, PETRI_PLACES=1106, PETRI_TRANSITIONS=2623} [2023-08-30 19:48:50,187 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1076 predicate places. [2023-08-30 19:48:50,188 INFO L495 AbstractCegarLoop]: Abstraction has has 1106 places, 2623 transitions, 73299 flow [2023-08-30 19:48:50,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:48:50,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:48:50,188 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:48:50,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 19:48:50,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 19:48:50,393 INFO L420 AbstractCegarLoop]: === Iteration 29 === 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 19:48:50,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:48:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2055918567, now seen corresponding path program 22 times [2023-08-30 19:48:50,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:48:50,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061773899] [2023-08-30 19:48:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:48:50,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:48:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:48:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:48:50,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:48:50,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061773899] [2023-08-30 19:48:50,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061773899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:48:50,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377325133] [2023-08-30 19:48:50,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:48:50,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:48:50,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:48:50,880 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:48:50,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 19:48:50,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:48:50,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:48:50,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:48:50,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:48:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:48:51,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:48:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:48:53,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377325133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:48:53,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:48:53,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 19:48:53,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097064768] [2023-08-30 19:48:53,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:48:53,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:48:53,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:48:53,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:48:53,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:48:53,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:48:53,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1106 places, 2623 transitions, 73299 flow. Second operand has 30 states, 30 states have (on average 84.1) internal successors, (2523), 30 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:48:53,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:48:53,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:48:53,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:49:23,026 INFO L130 PetriNetUnfolder]: 18879/33865 cut-off events. [2023-08-30 19:49:23,026 INFO L131 PetriNetUnfolder]: For 9904962/9911900 co-relation queries the response was YES. [2023-08-30 19:49:24,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561211 conditions, 33865 events. 18879/33865 cut-off events. For 9904962/9911900 co-relation queries the response was YES. Maximal size of possible extension queue 1521. Compared 299077 event pairs, 1472 based on Foata normal form. 1360/34900 useless extension candidates. Maximal degree in co-relation 560015. Up to 11044 conditions per place. [2023-08-30 19:49:24,441 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 1968 selfloop transitions, 991 changer transitions 451/3497 dead transitions. [2023-08-30 19:49:24,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1113 places, 3497 transitions, 108495 flow [2023-08-30 19:49:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-08-30 19:49:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-08-30 19:49:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 8200 transitions. [2023-08-30 19:49:24,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47409805735430155 [2023-08-30 19:49:24,445 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 8200 transitions. [2023-08-30 19:49:24,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 8200 transitions. [2023-08-30 19:49:24,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:49:24,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 8200 transitions. [2023-08-30 19:49:24,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 89.1304347826087) internal successors, (8200), 92 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:49:24,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 188.0) internal successors, (17484), 93 states have internal predecessors, (17484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:49:24,457 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 188.0) internal successors, (17484), 93 states have internal predecessors, (17484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:49:24,457 INFO L175 Difference]: Start difference. First operand has 1106 places, 2623 transitions, 73299 flow. Second operand 92 states and 8200 transitions. [2023-08-30 19:49:24,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1113 places, 3497 transitions, 108495 flow [2023-08-30 19:50:20,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1009 places, 3497 transitions, 100336 flow, removed 3987 selfloop flow, removed 104 redundant places. [2023-08-30 19:50:20,832 INFO L231 Difference]: Finished difference. Result has 1048 places, 2755 transitions, 79329 flow [2023-08-30 19:50:20,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=70528, PETRI_DIFFERENCE_MINUEND_PLACES=918, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=793, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=79329, PETRI_PLACES=1048, PETRI_TRANSITIONS=2755} [2023-08-30 19:50:20,834 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1018 predicate places. [2023-08-30 19:50:20,834 INFO L495 AbstractCegarLoop]: Abstraction has has 1048 places, 2755 transitions, 79329 flow [2023-08-30 19:50:20,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.1) internal successors, (2523), 30 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:50:20,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:50:20,835 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:50:20,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-30 19:50:21,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 19:50:21,039 INFO L420 AbstractCegarLoop]: === Iteration 30 === 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 19:50:21,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:50:21,039 INFO L85 PathProgramCache]: Analyzing trace with hash 189166611, now seen corresponding path program 23 times [2023-08-30 19:50:21,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:50:21,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85243589] [2023-08-30 19:50:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:50:21,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:50:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:50:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:50:21,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:50:21,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85243589] [2023-08-30 19:50:21,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85243589] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:50:21,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847708554] [2023-08-30 19:50:21,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:50:21,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:50:21,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:50:21,447 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:50:21,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 19:50:21,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-08-30 19:50:21,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:50:21,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:50:21,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:50:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:50:22,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:50:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:50:23,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847708554] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:50:23,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:50:23,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-30 19:50:23,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379140211] [2023-08-30 19:50:23,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:50:23,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 19:50:23,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:50:23,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 19:50:23,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2023-08-30 19:50:24,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:50:24,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1048 places, 2755 transitions, 79329 flow. Second operand has 31 states, 31 states have (on average 84.06451612903226) internal successors, (2606), 31 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:50:24,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:50:24,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:50:24,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:50:52,288 INFO L130 PetriNetUnfolder]: 19446/35108 cut-off events. [2023-08-30 19:50:52,288 INFO L131 PetriNetUnfolder]: For 4493799/4498618 co-relation queries the response was YES. [2023-08-30 19:50:54,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476897 conditions, 35108 events. 19446/35108 cut-off events. For 4493799/4498618 co-relation queries the response was YES. Maximal size of possible extension queue 1572. Compared 315773 event pairs, 1294 based on Foata normal form. 1263/36027 useless extension candidates. Maximal degree in co-relation 476564. Up to 12893 conditions per place. [2023-08-30 19:50:55,074 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 2167 selfloop transitions, 859 changer transitions 488/3601 dead transitions. [2023-08-30 19:50:55,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1119 places, 3601 transitions, 109615 flow [2023-08-30 19:50:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-08-30 19:50:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2023-08-30 19:50:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 8831 transitions. [2023-08-30 19:50:55,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744788308618096 [2023-08-30 19:50:55,081 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 8831 transitions. [2023-08-30 19:50:55,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 8831 transitions. [2023-08-30 19:50:55,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:50:55,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 8831 transitions. [2023-08-30 19:50:55,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 89.20202020202021) internal successors, (8831), 99 states have internal predecessors, (8831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:50:55,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 188.0) internal successors, (18800), 100 states have internal predecessors, (18800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:50:55,100 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 188.0) internal successors, (18800), 100 states have internal predecessors, (18800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:50:55,100 INFO L175 Difference]: Start difference. First operand has 1048 places, 2755 transitions, 79329 flow. Second operand 99 states and 8831 transitions. [2023-08-30 19:50:55,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1119 places, 3601 transitions, 109615 flow [2023-08-30 19:51:29,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1078 places, 3601 transitions, 107577 flow, removed 918 selfloop flow, removed 41 redundant places. [2023-08-30 19:51:29,792 INFO L231 Difference]: Finished difference. Result has 1107 places, 2862 transitions, 84208 flow [2023-08-30 19:51:29,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=77467, PETRI_DIFFERENCE_MINUEND_PLACES=980, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=734, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2007, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=84208, PETRI_PLACES=1107, PETRI_TRANSITIONS=2862} [2023-08-30 19:51:29,795 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1077 predicate places. [2023-08-30 19:51:29,795 INFO L495 AbstractCegarLoop]: Abstraction has has 1107 places, 2862 transitions, 84208 flow [2023-08-30 19:51:29,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 84.06451612903226) internal successors, (2606), 31 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:51:29,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:51:29,795 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:51:29,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-30 19:51:29,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:51:29,996 INFO L420 AbstractCegarLoop]: === Iteration 31 === 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 19:51:29,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:51:29,996 INFO L85 PathProgramCache]: Analyzing trace with hash 226689989, now seen corresponding path program 24 times [2023-08-30 19:51:29,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:51:29,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450456782] [2023-08-30 19:51:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:51:29,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:51:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:51:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:51:30,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:51:30,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450456782] [2023-08-30 19:51:30,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450456782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:51:30,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120323144] [2023-08-30 19:51:30,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:51:30,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:51:30,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:51:30,399 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:51:30,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 19:51:30,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 19:51:30,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:51:30,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:51:30,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:51:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:51:31,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:51:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:51:32,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120323144] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:51:32,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:51:32,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-30 19:51:32,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982059653] [2023-08-30 19:51:32,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:51:32,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 19:51:32,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:51:32,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 19:51:32,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2023-08-30 19:51:32,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:51:32,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1107 places, 2862 transitions, 84208 flow. Second operand has 31 states, 31 states have (on average 84.06451612903226) internal successors, (2606), 31 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:51:32,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:51:32,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:51:32,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:52:05,031 INFO L130 PetriNetUnfolder]: 20014/36228 cut-off events. [2023-08-30 19:52:05,032 INFO L131 PetriNetUnfolder]: For 5354716/5359327 co-relation queries the response was YES. [2023-08-30 19:52:07,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507628 conditions, 36228 events. 20014/36228 cut-off events. For 5354716/5359327 co-relation queries the response was YES. Maximal size of possible extension queue 1607. Compared 328129 event pairs, 1308 based on Foata normal form. 1317/37199 useless extension candidates. Maximal degree in co-relation 506136. Up to 13144 conditions per place. [2023-08-30 19:52:07,514 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 2201 selfloop transitions, 904 changer transitions 540/3728 dead transitions. [2023-08-30 19:52:07,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1160 places, 3728 transitions, 116237 flow [2023-08-30 19:52:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-08-30 19:52:07,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2023-08-30 19:52:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 9090 transitions. [2023-08-30 19:52:07,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740300375469337 [2023-08-30 19:52:07,519 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 9090 transitions. [2023-08-30 19:52:07,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 9090 transitions. [2023-08-30 19:52:07,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:52:07,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 9090 transitions. [2023-08-30 19:52:07,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 89.11764705882354) internal successors, (9090), 102 states have internal predecessors, (9090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:52:07,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 188.0) internal successors, (19364), 103 states have internal predecessors, (19364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:52:07,533 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 188.0) internal successors, (19364), 103 states have internal predecessors, (19364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:52:07,533 INFO L175 Difference]: Start difference. First operand has 1107 places, 2862 transitions, 84208 flow. Second operand 102 states and 9090 transitions. [2023-08-30 19:52:07,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1160 places, 3728 transitions, 116237 flow [2023-08-30 19:53:03,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1115 places, 3728 transitions, 113444 flow, removed 1303 selfloop flow, removed 45 redundant places. [2023-08-30 19:53:03,439 INFO L231 Difference]: Finished difference. Result has 1139 places, 2897 transitions, 87581 flow [2023-08-30 19:53:03,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=82479, PETRI_DIFFERENCE_MINUEND_PLACES=1014, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=785, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2065, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=87581, PETRI_PLACES=1139, PETRI_TRANSITIONS=2897} [2023-08-30 19:53:03,441 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1109 predicate places. [2023-08-30 19:53:03,441 INFO L495 AbstractCegarLoop]: Abstraction has has 1139 places, 2897 transitions, 87581 flow [2023-08-30 19:53:03,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 84.06451612903226) internal successors, (2606), 31 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:53:03,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:53:03,441 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:53:03,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 19:53:03,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:53:03,647 INFO L420 AbstractCegarLoop]: === Iteration 32 === 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 19:53:03,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:53:03,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1984821604, now seen corresponding path program 25 times [2023-08-30 19:53:03,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:53:03,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448482725] [2023-08-30 19:53:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:53:03,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:53:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:53:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:53:04,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:53:04,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448482725] [2023-08-30 19:53:04,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448482725] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:53:04,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603532157] [2023-08-30 19:53:04,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:53:04,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:53:04,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:53:04,120 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:53:04,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 19:53:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:53:04,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:53:04,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:53:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:53:04,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:53:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:53:06,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603532157] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:53:06,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:53:06,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 19:53:06,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525823241] [2023-08-30 19:53:06,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:53:06,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:53:06,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:53:06,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:53:06,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:53:06,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-30 19:53:06,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1139 places, 2897 transitions, 87581 flow. Second operand has 30 states, 30 states have (on average 84.06666666666666) internal successors, (2522), 30 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:53:06,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:53:06,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-30 19:53:06,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15