./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/popl20-threaded-sum-3.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 a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 03:52:13,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:52:13,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:52:13,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:52:13,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:52:13,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:52:13,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:52:13,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:52:13,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:52:13,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:52:13,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:52:13,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:52:13,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:52:13,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:52:13,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:52:13,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:52:13,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:52:13,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:52:13,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:52:13,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:52:13,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:52:13,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:52:13,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:52:13,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:52:13,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:52:13,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:52:13,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:52:13,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:52:13,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:52:13,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:52:13,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:52:13,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:52:13,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:52:13,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:52:13,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:52:13,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:52:13,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:52:13,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:52:13,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:52:13,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:52:13,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:52:13,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:52:13,725 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:52:13,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:52:13,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:52:13,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:52:13,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:52:13,727 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:52:13,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:52:13,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:52:13,728 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:52:13,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:52:13,729 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:52:13,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:52:13,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:52:13,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:52:13,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:52:13,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:52:13,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:52:13,731 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:52:13,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:52:13,731 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:52:13,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:52:13,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:52:13,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:52:13,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:52:13,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:52:13,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:52:13,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:52:13,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:52:13,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:52:13,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:52:13,733 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:52:13,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:52:13,734 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:52:13,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:52:13,734 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:52:13,734 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:52:14,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:52:14,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:52:14,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:52:14,038 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:52:14,039 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:52:14,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c [2023-08-31 03:52:15,169 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:52:15,409 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:52:15,409 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c [2023-08-31 03:52:15,419 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94fd8625c/17c48a5f511244d38028e382a4c98adf/FLAGe3d22e779 [2023-08-31 03:52:15,437 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94fd8625c/17c48a5f511244d38028e382a4c98adf [2023-08-31 03:52:15,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:52:15,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:52:15,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:52:15,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:52:15,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:52:15,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f3595e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15, skipping insertion in model container [2023-08-31 03:52:15,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:52:15,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:52:15,665 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/popl20-threaded-sum-3.wvr.c[2957,2970] [2023-08-31 03:52:15,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:52:15,685 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:52:15,725 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/popl20-threaded-sum-3.wvr.c[2957,2970] [2023-08-31 03:52:15,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:52:15,742 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:52:15,742 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:52:15,747 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:52:15,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15 WrapperNode [2023-08-31 03:52:15,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:52:15,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:52:15,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:52:15,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:52:15,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,796 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2023-08-31 03:52:15,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:52:15,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:52:15,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:52:15,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:52:15,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,819 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:52:15,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:52:15,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:52:15,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:52:15,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15" (1/1) ... [2023-08-31 03:52:15,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:52:15,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:52:15,858 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) [2023-08-31 03:52:15,873 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 [2023-08-31 03:52:15,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:52:15,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:52:15,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:52:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:52:15,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:52:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 03:52:15,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 03:52:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:52:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:52:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:52:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:52:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:52:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:52:15,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:52:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:52:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:52:15,909 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 03:52:16,032 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:52:16,033 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:52:16,249 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:52:16,323 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:52:16,323 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 03:52:16,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:52:16 BoogieIcfgContainer [2023-08-31 03:52:16,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:52:16,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:52:16,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:52:16,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:52:16,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:52:15" (1/3) ... [2023-08-31 03:52:16,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3839e494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:52:16, skipping insertion in model container [2023-08-31 03:52:16,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:52:15" (2/3) ... [2023-08-31 03:52:16,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3839e494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:52:16, skipping insertion in model container [2023-08-31 03:52:16,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:52:16" (3/3) ... [2023-08-31 03:52:16,333 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2023-08-31 03:52:16,339 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:52:16,347 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:52:16,348 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:52:16,348 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:52:16,442 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 03:52:16,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 111 transitions, 246 flow [2023-08-31 03:52:16,557 INFO L130 PetriNetUnfolder]: 8/108 cut-off events. [2023-08-31 03:52:16,560 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:52:16,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 108 events. 8/108 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2023-08-31 03:52:16,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 111 transitions, 246 flow [2023-08-31 03:52:16,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 98 transitions, 214 flow [2023-08-31 03:52:16,582 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:52:16,593 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 98 transitions, 214 flow [2023-08-31 03:52:16,597 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 98 transitions, 214 flow [2023-08-31 03:52:16,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 98 transitions, 214 flow [2023-08-31 03:52:16,637 INFO L130 PetriNetUnfolder]: 8/98 cut-off events. [2023-08-31 03:52:16,643 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:52:16,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 98 events. 8/98 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 58 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2023-08-31 03:52:16,646 INFO L119 LiptonReduction]: Number of co-enabled transitions 1010 [2023-08-31 03:52:19,605 INFO L134 LiptonReduction]: Checked pairs total: 1725 [2023-08-31 03:52:19,606 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-08-31 03:52:19,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:52:19,623 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;@60ebcaa1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:52:19,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 03:52:19,629 INFO L130 PetriNetUnfolder]: 3/24 cut-off events. [2023-08-31 03:52:19,630 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:52:19,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:52:19,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:52:19,631 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)] === [2023-08-31 03:52:19,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:52:19,635 INFO L85 PathProgramCache]: Analyzing trace with hash -807744710, now seen corresponding path program 1 times [2023-08-31 03:52:19,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:52:19,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913749642] [2023-08-31 03:52:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:52:19,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:52:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:20,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:52:20,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913749642] [2023-08-31 03:52:20,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913749642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:52:20,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:52:20,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:52:20,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827391202] [2023-08-31 03:52:20,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:52:20,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:52:20,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:52:20,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:52:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:52:20,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 195 [2023-08-31 03:52:20,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 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) [2023-08-31 03:52:20,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:52:20,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 195 [2023-08-31 03:52:20,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:52:20,730 INFO L130 PetriNetUnfolder]: 593/845 cut-off events. [2023-08-31 03:52:20,731 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-31 03:52:20,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1734 conditions, 845 events. 593/845 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3158 event pairs, 73 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 1648. Up to 529 conditions per place. [2023-08-31 03:52:20,738 INFO L137 encePairwiseOnDemand]: 189/195 looper letters, 44 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2023-08-31 03:52:20,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 240 flow [2023-08-31 03:52:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:52:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:52:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 493 transitions. [2023-08-31 03:52:20,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056410256410256 [2023-08-31 03:52:20,752 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 493 transitions. [2023-08-31 03:52:20,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 493 transitions. [2023-08-31 03:52:20,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:52:20,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 493 transitions. [2023-08-31 03:52:20,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:20,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:20,765 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:20,766 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 5 states and 493 transitions. [2023-08-31 03:52:20,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 54 transitions, 240 flow [2023-08-31 03:52:20,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 54 transitions, 220 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 03:52:20,771 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 108 flow [2023-08-31 03:52:20,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-31 03:52:20,776 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2023-08-31 03:52:20,776 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 108 flow [2023-08-31 03:52:20,777 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) [2023-08-31 03:52:20,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:52:20,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:52:20,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:52:20,778 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)] === [2023-08-31 03:52:20,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:52:20,778 INFO L85 PathProgramCache]: Analyzing trace with hash 381329258, now seen corresponding path program 1 times [2023-08-31 03:52:20,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:52:20,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401363844] [2023-08-31 03:52:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:52:20,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:52:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:21,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:52:21,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401363844] [2023-08-31 03:52:21,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401363844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:52:21,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:52:21,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:52:21,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533272779] [2023-08-31 03:52:21,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:52:21,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:52:21,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:52:21,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:52:21,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:52:21,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 195 [2023-08-31 03:52:21,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:21,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:52:21,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 195 [2023-08-31 03:52:21,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:52:21,307 INFO L130 PetriNetUnfolder]: 767/1090 cut-off events. [2023-08-31 03:52:21,307 INFO L131 PetriNetUnfolder]: For 735/741 co-relation queries the response was YES. [2023-08-31 03:52:21,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2953 conditions, 1090 events. 767/1090 cut-off events. For 735/741 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4352 event pairs, 121 based on Foata normal form. 38/1124 useless extension candidates. Maximal degree in co-relation 1543. Up to 470 conditions per place. [2023-08-31 03:52:21,314 INFO L137 encePairwiseOnDemand]: 189/195 looper letters, 51 selfloop transitions, 10 changer transitions 2/65 dead transitions. [2023-08-31 03:52:21,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 65 transitions, 345 flow [2023-08-31 03:52:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:52:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:52:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 580 transitions. [2023-08-31 03:52:21,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49572649572649574 [2023-08-31 03:52:21,321 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 580 transitions. [2023-08-31 03:52:21,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 580 transitions. [2023-08-31 03:52:21,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:52:21,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 580 transitions. [2023-08-31 03:52:21,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:21,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 195.0) internal successors, (1365), 7 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:21,328 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 195.0) internal successors, (1365), 7 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:21,328 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 108 flow. Second operand 6 states and 580 transitions. [2023-08-31 03:52:21,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 65 transitions, 345 flow [2023-08-31 03:52:21,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 65 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:52:21,332 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 189 flow [2023-08-31 03:52:21,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-31 03:52:21,333 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 9 predicate places. [2023-08-31 03:52:21,334 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 189 flow [2023-08-31 03:52:21,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:21,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:52:21,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:52:21,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 03:52:21,335 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)] === [2023-08-31 03:52:21,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:52:21,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1574289386, now seen corresponding path program 2 times [2023-08-31 03:52:21,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:52:21,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147112893] [2023-08-31 03:52:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:52:21,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:52:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:21,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:52:21,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147112893] [2023-08-31 03:52:21,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147112893] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:52:21,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:52:21,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:52:21,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043702001] [2023-08-31 03:52:21,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:52:21,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:52:21,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:52:21,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:52:21,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:52:21,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 195 [2023-08-31 03:52:21,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:21,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:52:21,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 195 [2023-08-31 03:52:21,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:52:22,006 INFO L130 PetriNetUnfolder]: 1098/1642 cut-off events. [2023-08-31 03:52:22,006 INFO L131 PetriNetUnfolder]: For 2693/2785 co-relation queries the response was YES. [2023-08-31 03:52:22,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4866 conditions, 1642 events. 1098/1642 cut-off events. For 2693/2785 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7442 event pairs, 244 based on Foata normal form. 93/1699 useless extension candidates. Maximal degree in co-relation 2534. Up to 876 conditions per place. [2023-08-31 03:52:22,019 INFO L137 encePairwiseOnDemand]: 188/195 looper letters, 57 selfloop transitions, 23 changer transitions 0/88 dead transitions. [2023-08-31 03:52:22,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 88 transitions, 569 flow [2023-08-31 03:52:22,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:52:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:52:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 573 transitions. [2023-08-31 03:52:22,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897435897435897 [2023-08-31 03:52:22,022 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 573 transitions. [2023-08-31 03:52:22,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 573 transitions. [2023-08-31 03:52:22,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:52:22,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 573 transitions. [2023-08-31 03:52:22,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.5) internal successors, (573), 6 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:22,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 195.0) internal successors, (1365), 7 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:22,026 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 195.0) internal successors, (1365), 7 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:22,027 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 189 flow. Second operand 6 states and 573 transitions. [2023-08-31 03:52:22,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 88 transitions, 569 flow [2023-08-31 03:52:22,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 88 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:52:22,034 INFO L231 Difference]: Finished difference. Result has 47 places, 57 transitions, 402 flow [2023-08-31 03:52:22,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=402, PETRI_PLACES=47, PETRI_TRANSITIONS=57} [2023-08-31 03:52:22,035 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2023-08-31 03:52:22,035 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 57 transitions, 402 flow [2023-08-31 03:52:22,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:22,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:52:22,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:52:22,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 03:52:22,036 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)] === [2023-08-31 03:52:22,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:52:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1958053396, now seen corresponding path program 3 times [2023-08-31 03:52:22,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:52:22,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561605827] [2023-08-31 03:52:22,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:52:22,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:52:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:52:22,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:52:22,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561605827] [2023-08-31 03:52:22,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561605827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:52:22,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:52:22,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:52:22,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542255031] [2023-08-31 03:52:22,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:52:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:52:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:52:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:52:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:52:22,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 195 [2023-08-31 03:52:22,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 57 transitions, 402 flow. Second operand has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:22,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:52:22,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 195 [2023-08-31 03:52:22,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:52:22,637 INFO L130 PetriNetUnfolder]: 1929/2820 cut-off events. [2023-08-31 03:52:22,638 INFO L131 PetriNetUnfolder]: For 7826/8058 co-relation queries the response was YES. [2023-08-31 03:52:22,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11151 conditions, 2820 events. 1929/2820 cut-off events. For 7826/8058 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 13973 event pairs, 180 based on Foata normal form. 266/3045 useless extension candidates. Maximal degree in co-relation 6508. Up to 1546 conditions per place. [2023-08-31 03:52:22,658 INFO L137 encePairwiseOnDemand]: 189/195 looper letters, 122 selfloop transitions, 16 changer transitions 1/142 dead transitions. [2023-08-31 03:52:22,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 142 transitions, 1325 flow [2023-08-31 03:52:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:52:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:52:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 503 transitions. [2023-08-31 03:52:22,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158974358974359 [2023-08-31 03:52:22,661 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 503 transitions. [2023-08-31 03:52:22,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 503 transitions. [2023-08-31 03:52:22,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:52:22,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 503 transitions. [2023-08-31 03:52:22,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:22,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:22,666 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:22,666 INFO L175 Difference]: Start difference. First operand has 47 places, 57 transitions, 402 flow. Second operand 5 states and 503 transitions. [2023-08-31 03:52:22,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 142 transitions, 1325 flow [2023-08-31 03:52:22,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 142 transitions, 1325 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 03:52:22,679 INFO L231 Difference]: Finished difference. Result has 54 places, 69 transitions, 579 flow [2023-08-31 03:52:22,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=579, PETRI_PLACES=54, PETRI_TRANSITIONS=69} [2023-08-31 03:52:22,680 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2023-08-31 03:52:22,680 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 69 transitions, 579 flow [2023-08-31 03:52:22,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:22,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:52:22,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:52:22,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 03:52:22,681 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)] === [2023-08-31 03:52:22,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:52:22,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1258200504, now seen corresponding path program 1 times [2023-08-31 03:52:22,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:52:22,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756363445] [2023-08-31 03:52:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:52:22,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:52:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:23,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:52:23,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756363445] [2023-08-31 03:52:23,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756363445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:52:23,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346857801] [2023-08-31 03:52:23,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:52:23,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:52:23,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:52:23,163 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) [2023-08-31 03:52:23,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 03:52:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:23,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:52:23,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:52:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:52:23,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:52:23,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346857801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:52:23,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:52:23,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-08-31 03:52:23,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691823808] [2023-08-31 03:52:23,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:52:23,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:52:23,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:52:23,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:52:23,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-31 03:52:23,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 195 [2023-08-31 03:52:23,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 69 transitions, 579 flow. Second operand has 5 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:23,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:52:23,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 195 [2023-08-31 03:52:23,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:52:23,820 INFO L130 PetriNetUnfolder]: 2212/3211 cut-off events. [2023-08-31 03:52:23,821 INFO L131 PetriNetUnfolder]: For 11017/11277 co-relation queries the response was YES. [2023-08-31 03:52:23,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14067 conditions, 3211 events. 2212/3211 cut-off events. For 11017/11277 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 15301 event pairs, 329 based on Foata normal form. 368/3503 useless extension candidates. Maximal degree in co-relation 7075. Up to 2173 conditions per place. [2023-08-31 03:52:23,855 INFO L137 encePairwiseOnDemand]: 189/195 looper letters, 82 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2023-08-31 03:52:23,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 110 transitions, 1084 flow [2023-08-31 03:52:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:52:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:52:23,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 483 transitions. [2023-08-31 03:52:23,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49538461538461537 [2023-08-31 03:52:23,857 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 483 transitions. [2023-08-31 03:52:23,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 483 transitions. [2023-08-31 03:52:23,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:52:23,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 483 transitions. [2023-08-31 03:52:23,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:23,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:23,861 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:23,861 INFO L175 Difference]: Start difference. First operand has 54 places, 69 transitions, 579 flow. Second operand 5 states and 483 transitions. [2023-08-31 03:52:23,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 110 transitions, 1084 flow [2023-08-31 03:52:23,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 110 transitions, 1067 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 03:52:23,878 INFO L231 Difference]: Finished difference. Result has 59 places, 78 transitions, 693 flow [2023-08-31 03:52:23,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=693, PETRI_PLACES=59, PETRI_TRANSITIONS=78} [2023-08-31 03:52:23,879 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 27 predicate places. [2023-08-31 03:52:23,879 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 78 transitions, 693 flow [2023-08-31 03:52:23,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:23,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:52:23,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:52:23,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 03:52:24,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:52:24,085 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)] === [2023-08-31 03:52:24,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:52:24,086 INFO L85 PathProgramCache]: Analyzing trace with hash 375050114, now seen corresponding path program 2 times [2023-08-31 03:52:24,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:52:24,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062939544] [2023-08-31 03:52:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:52:24,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:52:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:24,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:52:24,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062939544] [2023-08-31 03:52:24,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062939544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:52:24,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048372869] [2023-08-31 03:52:24,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:52:24,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:52:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:52:24,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:52:24,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 03:52:24,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:52:24,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:52:24,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:52:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:52:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:24,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:52:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:24,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048372869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:52:24,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:52:24,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 12 [2023-08-31 03:52:24,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709717586] [2023-08-31 03:52:24,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:52:24,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 03:52:24,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:52:24,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 03:52:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-31 03:52:25,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 195 [2023-08-31 03:52:25,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 78 transitions, 693 flow. Second operand has 12 states, 12 states have (on average 82.75) internal successors, (993), 12 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:25,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:52:25,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 195 [2023-08-31 03:52:25,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:52:26,747 INFO L130 PetriNetUnfolder]: 4048/5727 cut-off events. [2023-08-31 03:52:26,747 INFO L131 PetriNetUnfolder]: For 24201/24201 co-relation queries the response was YES. [2023-08-31 03:52:26,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27357 conditions, 5727 events. 4048/5727 cut-off events. For 24201/24201 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 27091 event pairs, 232 based on Foata normal form. 424/6151 useless extension candidates. Maximal degree in co-relation 24506. Up to 1545 conditions per place. [2023-08-31 03:52:26,793 INFO L137 encePairwiseOnDemand]: 183/195 looper letters, 224 selfloop transitions, 119 changer transitions 0/343 dead transitions. [2023-08-31 03:52:26,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 343 transitions, 3518 flow [2023-08-31 03:52:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 03:52:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 03:52:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1905 transitions. [2023-08-31 03:52:26,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44405594405594406 [2023-08-31 03:52:26,799 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1905 transitions. [2023-08-31 03:52:26,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1905 transitions. [2023-08-31 03:52:26,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:52:26,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1905 transitions. [2023-08-31 03:52:26,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 86.5909090909091) internal successors, (1905), 22 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:26,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 195.0) internal successors, (4485), 23 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:26,811 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 195.0) internal successors, (4485), 23 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:26,811 INFO L175 Difference]: Start difference. First operand has 59 places, 78 transitions, 693 flow. Second operand 22 states and 1905 transitions. [2023-08-31 03:52:26,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 343 transitions, 3518 flow [2023-08-31 03:52:26,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 343 transitions, 3515 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:52:26,861 INFO L231 Difference]: Finished difference. Result has 96 places, 174 transitions, 2200 flow [2023-08-31 03:52:26,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2200, PETRI_PLACES=96, PETRI_TRANSITIONS=174} [2023-08-31 03:52:26,862 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 64 predicate places. [2023-08-31 03:52:26,863 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 174 transitions, 2200 flow [2023-08-31 03:52:26,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.75) internal successors, (993), 12 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:26,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:52:26,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:52:26,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 03:52:27,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-31 03:52:27,069 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)] === [2023-08-31 03:52:27,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:52:27,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1058562884, now seen corresponding path program 3 times [2023-08-31 03:52:27,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:52:27,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824606398] [2023-08-31 03:52:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:52:27,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:52:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:29,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:52:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824606398] [2023-08-31 03:52:29,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824606398] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:52:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552832429] [2023-08-31 03:52:29,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:52:29,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:52:29,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:52:29,361 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) [2023-08-31 03:52:29,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 03:52:29,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:52:29,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:52:29,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 03:52:29,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:52:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:30,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:52:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:31,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552832429] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:52:31,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:52:31,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-08-31 03:52:31,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438571231] [2023-08-31 03:52:31,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:52:31,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:52:31,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:52:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:52:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:52:32,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 195 [2023-08-31 03:52:32,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 174 transitions, 2200 flow. Second operand has 23 states, 23 states have (on average 73.73913043478261) internal successors, (1696), 23 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:32,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:52:32,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 195 [2023-08-31 03:52:32,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:52:51,687 INFO L130 PetriNetUnfolder]: 16542/23506 cut-off events. [2023-08-31 03:52:51,687 INFO L131 PetriNetUnfolder]: For 233240/233240 co-relation queries the response was YES. [2023-08-31 03:52:51,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147296 conditions, 23506 events. 16542/23506 cut-off events. For 233240/233240 co-relation queries the response was YES. Maximal size of possible extension queue 1231. Compared 140831 event pairs, 248 based on Foata normal form. 11/23517 useless extension candidates. Maximal degree in co-relation 142832. Up to 6499 conditions per place. [2023-08-31 03:52:52,003 INFO L137 encePairwiseOnDemand]: 182/195 looper letters, 775 selfloop transitions, 1037 changer transitions 254/2066 dead transitions. [2023-08-31 03:52:52,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 2066 transitions, 28879 flow [2023-08-31 03:52:52,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-08-31 03:52:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2023-08-31 03:52:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 7841 transitions. [2023-08-31 03:52:52,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061642061642062 [2023-08-31 03:52:52,024 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 7841 transitions. [2023-08-31 03:52:52,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 7841 transitions. [2023-08-31 03:52:52,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:52:52,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 7841 transitions. [2023-08-31 03:52:52,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 79.20202020202021) internal successors, (7841), 99 states have internal predecessors, (7841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:52,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 195.0) internal successors, (19500), 100 states have internal predecessors, (19500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:52,083 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 195.0) internal successors, (19500), 100 states have internal predecessors, (19500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:52,083 INFO L175 Difference]: Start difference. First operand has 96 places, 174 transitions, 2200 flow. Second operand 99 states and 7841 transitions. [2023-08-31 03:52:52,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 2066 transitions, 28879 flow [2023-08-31 03:52:53,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 2066 transitions, 27323 flow, removed 635 selfloop flow, removed 4 redundant places. [2023-08-31 03:52:53,121 INFO L231 Difference]: Finished difference. Result has 248 places, 1235 transitions, 20045 flow [2023-08-31 03:52:53,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=20045, PETRI_PLACES=248, PETRI_TRANSITIONS=1235} [2023-08-31 03:52:53,122 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 216 predicate places. [2023-08-31 03:52:53,122 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 1235 transitions, 20045 flow [2023-08-31 03:52:53,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 73.73913043478261) internal successors, (1696), 23 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:53,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:52:53,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:52:53,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 03:52:53,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:52:53,329 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)] === [2023-08-31 03:52:53,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:52:53,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1269405116, now seen corresponding path program 4 times [2023-08-31 03:52:53,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:52:53,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655432144] [2023-08-31 03:52:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:52:53,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:52:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:56,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:52:56,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655432144] [2023-08-31 03:52:56,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655432144] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:52:56,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169025485] [2023-08-31 03:52:56,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:52:56,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:52:56,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:52:56,101 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) [2023-08-31 03:52:56,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 03:52:56,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:52:56,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:52:56,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 03:52:56,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:52:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:57,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:52:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:59,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169025485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:52:59,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:52:59,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-08-31 03:52:59,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857889977] [2023-08-31 03:52:59,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:52:59,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 03:52:59,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:52:59,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 03:52:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2023-08-31 03:53:01,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:53:02,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 195 [2023-08-31 03:53:02,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 1235 transitions, 20045 flow. Second operand has 27 states, 27 states have (on average 75.18518518518519) internal successors, (2030), 27 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:53:02,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:53:02,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 195 [2023-08-31 03:53:02,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:53:35,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:54:13,591 INFO L130 PetriNetUnfolder]: 32757/47184 cut-off events. [2023-08-31 03:54:13,591 INFO L131 PetriNetUnfolder]: For 1071998/1072181 co-relation queries the response was YES. [2023-08-31 03:54:14,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381450 conditions, 47184 events. 32757/47184 cut-off events. For 1071998/1072181 co-relation queries the response was YES. Maximal size of possible extension queue 2384. Compared 316980 event pairs, 540 based on Foata normal form. 220/47400 useless extension candidates. Maximal degree in co-relation 381189. Up to 11743 conditions per place. [2023-08-31 03:54:14,738 INFO L137 encePairwiseOnDemand]: 182/195 looper letters, 1396 selfloop transitions, 2974 changer transitions 767/5147 dead transitions. [2023-08-31 03:54:14,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 5147 transitions, 91442 flow [2023-08-31 03:54:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-08-31 03:54:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2023-08-31 03:54:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 10175 transitions. [2023-08-31 03:54:14,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41743589743589743 [2023-08-31 03:54:14,765 INFO L72 ComplementDD]: Start complementDD. Operand 125 states and 10175 transitions. [2023-08-31 03:54:14,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 10175 transitions. [2023-08-31 03:54:14,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:54:14,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 125 states and 10175 transitions. [2023-08-31 03:54:14,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 126 states, 125 states have (on average 81.4) internal successors, (10175), 125 states have internal predecessors, (10175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:54:14,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 126 states, 126 states have (on average 195.0) internal successors, (24570), 126 states have internal predecessors, (24570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:54:14,837 INFO L81 ComplementDD]: Finished complementDD. Result has 126 states, 126 states have (on average 195.0) internal successors, (24570), 126 states have internal predecessors, (24570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:54:14,838 INFO L175 Difference]: Start difference. First operand has 248 places, 1235 transitions, 20045 flow. Second operand 125 states and 10175 transitions. [2023-08-31 03:54:14,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 5147 transitions, 91442 flow [2023-08-31 03:54:37,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 5147 transitions, 82491 flow, removed 4472 selfloop flow, removed 9 redundant places. [2023-08-31 03:54:37,932 INFO L231 Difference]: Finished difference. Result has 413 places, 3669 transitions, 63948 flow [2023-08-31 03:54:37,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=17006, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=923, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=125, PETRI_FLOW=63948, PETRI_PLACES=413, PETRI_TRANSITIONS=3669} [2023-08-31 03:54:37,934 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 381 predicate places. [2023-08-31 03:54:37,934 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 3669 transitions, 63948 flow [2023-08-31 03:54:37,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 75.18518518518519) internal successors, (2030), 27 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:54:37,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:54:37,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:54:37,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:54:38,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:54:38,136 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)] === [2023-08-31 03:54:38,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:54:38,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1918446348, now seen corresponding path program 5 times [2023-08-31 03:54:38,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:54:38,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215481351] [2023-08-31 03:54:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:54:38,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:54:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:54:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:54:40,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:54:40,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215481351] [2023-08-31 03:54:40,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215481351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:54:40,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116041555] [2023-08-31 03:54:40,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:54:40,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:54:40,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:54:40,691 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) [2023-08-31 03:54:40,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 03:54:40,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:54:40,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:54:40,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 03:54:40,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:54:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:54:41,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:54:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:54:43,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116041555] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:54:43,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:54:43,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 26 [2023-08-31 03:54:43,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567069176] [2023-08-31 03:54:43,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:54:43,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:54:43,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:54:43,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:54:43,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2023-08-31 03:54:43,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 195 [2023-08-31 03:54:43,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 3669 transitions, 63948 flow. Second operand has 28 states, 28 states have (on average 73.46428571428571) internal successors, (2057), 28 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:54:43,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:54:43,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 195 [2023-08-31 03:54:43,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:55:05,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:55:30,498 INFO L130 PetriNetUnfolder]: 36338/52100 cut-off events. [2023-08-31 03:55:30,498 INFO L131 PetriNetUnfolder]: For 1162272/1162272 co-relation queries the response was YES. [2023-08-31 03:55:32,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441283 conditions, 52100 events. 36338/52100 cut-off events. For 1162272/1162272 co-relation queries the response was YES. Maximal size of possible extension queue 2706. Compared 352428 event pairs, 991 based on Foata normal form. 33/52133 useless extension candidates. Maximal degree in co-relation 440777. Up to 16842 conditions per place. [2023-08-31 03:55:32,577 INFO L137 encePairwiseOnDemand]: 182/195 looper letters, 1728 selfloop transitions, 3455 changer transitions 425/5608 dead transitions. [2023-08-31 03:55:32,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 5608 transitions, 107024 flow [2023-08-31 03:55:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-08-31 03:55:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2023-08-31 03:55:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 6320 transitions. [2023-08-31 03:55:32,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40512820512820513 [2023-08-31 03:55:32,586 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 6320 transitions. [2023-08-31 03:55:32,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 6320 transitions. [2023-08-31 03:55:32,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:55:32,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 6320 transitions. [2023-08-31 03:55:32,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 79.0) internal successors, (6320), 80 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:55:32,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 195.0) internal successors, (15795), 81 states have internal predecessors, (15795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:55:32,614 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 195.0) internal successors, (15795), 81 states have internal predecessors, (15795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:55:32,615 INFO L175 Difference]: Start difference. First operand has 413 places, 3669 transitions, 63948 flow. Second operand 80 states and 6320 transitions. [2023-08-31 03:55:32,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 5608 transitions, 107024 flow [2023-08-31 03:56:38,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 5608 transitions, 98712 flow, removed 4056 selfloop flow, removed 39 redundant places. [2023-08-31 03:56:38,754 INFO L231 Difference]: Finished difference. Result has 466 places, 4646 transitions, 87852 flow [2023-08-31 03:56:38,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=58745, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=971, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=87852, PETRI_PLACES=466, PETRI_TRANSITIONS=4646} [2023-08-31 03:56:38,758 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 434 predicate places. [2023-08-31 03:56:38,758 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 4646 transitions, 87852 flow [2023-08-31 03:56:38,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 73.46428571428571) internal successors, (2057), 28 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:56:38,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:56:38,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:56:38,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 03:56:38,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:56:38,965 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)] === [2023-08-31 03:56:38,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:56:38,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2124744865, now seen corresponding path program 1 times [2023-08-31 03:56:38,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:56:38,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293382326] [2023-08-31 03:56:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:56:38,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:56:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:56:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:56:39,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:56:39,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293382326] [2023-08-31 03:56:39,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293382326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:56:39,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152738115] [2023-08-31 03:56:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:56:39,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:56:39,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:56:39,286 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) [2023-08-31 03:56:39,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 03:56:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:56:39,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-31 03:56:39,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:56:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:56:39,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:56:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:56:40,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152738115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:56:40,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:56:40,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 21 [2023-08-31 03:56:40,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308690449] [2023-08-31 03:56:40,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:56:40,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:56:40,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:56:40,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:56:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:56:40,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 195 [2023-08-31 03:56:40,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 4646 transitions, 87852 flow. Second operand has 22 states, 22 states have (on average 75.5909090909091) internal successors, (1663), 22 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:56:40,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:56:40,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 195 [2023-08-31 03:56:40,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:57:51,049 INFO L130 PetriNetUnfolder]: 59671/86052 cut-off events. [2023-08-31 03:57:51,049 INFO L131 PetriNetUnfolder]: For 1865270/1865270 co-relation queries the response was YES. [2023-08-31 03:57:54,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768861 conditions, 86052 events. 59671/86052 cut-off events. For 1865270/1865270 co-relation queries the response was YES. Maximal size of possible extension queue 4402. Compared 626833 event pairs, 226 based on Foata normal form. 454/86506 useless extension candidates. Maximal degree in co-relation 768098. Up to 15579 conditions per place. [2023-08-31 03:57:54,944 INFO L137 encePairwiseOnDemand]: 181/195 looper letters, 3228 selfloop transitions, 7609 changer transitions 0/10837 dead transitions. [2023-08-31 03:57:54,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 10837 transitions, 222944 flow [2023-08-31 03:57:54,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-08-31 03:57:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2023-08-31 03:57:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 7881 transitions. [2023-08-31 03:57:54,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124018838304553 [2023-08-31 03:57:54,956 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 7881 transitions. [2023-08-31 03:57:54,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 7881 transitions. [2023-08-31 03:57:54,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:57:54,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 7881 transitions. [2023-08-31 03:57:54,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 80.41836734693878) internal successors, (7881), 98 states have internal predecessors, (7881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:57:54,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 195.0) internal successors, (19305), 99 states have internal predecessors, (19305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:57:54,992 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 195.0) internal successors, (19305), 99 states have internal predecessors, (19305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:57:54,992 INFO L175 Difference]: Start difference. First operand has 466 places, 4646 transitions, 87852 flow. Second operand 98 states and 7881 transitions. [2023-08-31 03:57:54,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 10837 transitions, 222944 flow [2023-08-31 04:00:38,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 10837 transitions, 219901 flow, removed 1372 selfloop flow, removed 21 redundant places. [2023-08-31 04:00:38,797 INFO L231 Difference]: Finished difference. Result has 589 places, 9742 transitions, 210368 flow [2023-08-31 04:00:38,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=86328, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2971, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=210368, PETRI_PLACES=589, PETRI_TRANSITIONS=9742} [2023-08-31 04:00:38,803 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 557 predicate places. [2023-08-31 04:00:38,803 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 9742 transitions, 210368 flow [2023-08-31 04:00:38,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 75.5909090909091) internal successors, (1663), 22 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:00:38,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:00:38,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:00:38,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 04:00:39,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:00:39,010 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)] === [2023-08-31 04:00:39,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:00:39,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1476761651, now seen corresponding path program 1 times [2023-08-31 04:00:39,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:00:39,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556511135] [2023-08-31 04:00:39,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:00:39,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:00:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:00:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:00:40,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:00:40,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556511135] [2023-08-31 04:00:40,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556511135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:00:40,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118000469] [2023-08-31 04:00:40,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:00:40,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:00:40,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:00:40,484 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) [2023-08-31 04:00:40,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 04:00:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:00:40,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-31 04:00:40,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:00:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:00:41,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:00:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:00:43,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118000469] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:00:43,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:00:43,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-31 04:00:43,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409860858] [2023-08-31 04:00:43,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:00:43,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 04:00:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:00:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 04:00:43,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-08-31 04:00:44,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 195 [2023-08-31 04:00:44,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 9742 transitions, 210368 flow. Second operand has 24 states, 24 states have (on average 80.5) internal successors, (1932), 24 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:00:44,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:00:44,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 195 [2023-08-31 04:00:44,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:04:30,904 INFO L130 PetriNetUnfolder]: 72393/106137 cut-off events. [2023-08-31 04:04:30,904 INFO L131 PetriNetUnfolder]: For 3701290/3701938 co-relation queries the response was YES. [2023-08-31 04:04:36,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106430 conditions, 106137 events. 72393/106137 cut-off events. For 3701290/3701938 co-relation queries the response was YES. Maximal size of possible extension queue 5309. Compared 818139 event pairs, 231 based on Foata normal form. 574/106684 useless extension candidates. Maximal degree in co-relation 1105603. Up to 24094 conditions per place. [2023-08-31 04:04:37,412 INFO L137 encePairwiseOnDemand]: 186/195 looper letters, 2770 selfloop transitions, 8914 changer transitions 657/13444 dead transitions. [2023-08-31 04:04:37,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 13444 transitions, 315264 flow [2023-08-31 04:04:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-31 04:04:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-31 04:04:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 6372 transitions. [2023-08-31 04:04:37,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415800415800416 [2023-08-31 04:04:37,420 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 6372 transitions. [2023-08-31 04:04:37,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 6372 transitions. [2023-08-31 04:04:37,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:04:37,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 6372 transitions. [2023-08-31 04:04:37,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 86.10810810810811) internal successors, (6372), 74 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:04:37,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 195.0) internal successors, (14625), 75 states have internal predecessors, (14625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:04:37,439 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 195.0) internal successors, (14625), 75 states have internal predecessors, (14625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:04:37,440 INFO L175 Difference]: Start difference. First operand has 589 places, 9742 transitions, 210368 flow. Second operand 74 states and 6372 transitions. [2023-08-31 04:04:37,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 13444 transitions, 315264 flow Killed by 15