./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-mult-4.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-mult-4.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 --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 03:26:26,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:26:26,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:26:26,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:26:26,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:26:26,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:26:26,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:26:26,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:26:26,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:26:26,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:26:26,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:26:26,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:26:26,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:26:26,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:26:26,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:26:26,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:26:26,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:26:26,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:26:26,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:26:26,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:26:26,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:26:26,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:26:26,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:26:26,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:26:26,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:26:26,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:26:26,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:26:26,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:26:26,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:26:26,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:26:26,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:26:26,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:26:26,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:26:26,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:26:26,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:26:26,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:26:26,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:26:26,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:26:26,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:26:26,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:26:26,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:26:26,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:26:26,132 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:26:26,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:26:26,134 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:26:26,134 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:26:26,134 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:26:26,135 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:26:26,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:26:26,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:26:26,135 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:26:26,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:26:26,136 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:26:26,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:26:26,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:26:26,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:26:26,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:26:26,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:26:26,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:26:26,137 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:26:26,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:26:26,138 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:26:26,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:26:26,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:26:26,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:26:26,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:26:26,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:26:26,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:26:26,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:26:26,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:26:26,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:26:26,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:26:26,139 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:26:26,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:26:26,140 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:26:26,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:26:26,140 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:26:26,140 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:26:26,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:26:26,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:26:26,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:26:26,426 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:26:26,426 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:26:26,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-08-31 03:26:27,494 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:26:27,670 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:26:27,670 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-08-31 03:26:27,675 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17311f989/88c580dd918249a3a0ae29d445ff26e0/FLAG707813341 [2023-08-31 03:26:27,686 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17311f989/88c580dd918249a3a0ae29d445ff26e0 [2023-08-31 03:26:27,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:26:27,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:26:27,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:26:27,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:26:27,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:26:27,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:27,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1717621e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27, skipping insertion in model container [2023-08-31 03:26:27,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:27,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:26:27,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:26:27,896 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-mult-4.wvr.c[2612,2625] [2023-08-31 03:26:27,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:26:27,911 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:26:27,938 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-mult-4.wvr.c[2612,2625] [2023-08-31 03:26:27,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:26:27,946 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:26:27,946 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:26:27,950 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:26:27,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27 WrapperNode [2023-08-31 03:26:27,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:26:27,952 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:26:27,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:26:27,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:26:27,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:27,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:27,990 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2023-08-31 03:26:27,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:26:27,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:26:27,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:26:27,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:26:27,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:27,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:28,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:28,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:28,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:28,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:28,021 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:28,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:28,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:26:28,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:26:28,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:26:28,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:26:28,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27" (1/1) ... [2023-08-31 03:26:28,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:26:28,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:26:28,048 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 03:26:28,051 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 03:26:28,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:26:28,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:26:28,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:26:28,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:26:28,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:26:28,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 03:26:28,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 03:26:28,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-31 03:26:28,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-31 03:26:28,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:26:28,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:26:28,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:26:28,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:26:28,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:26:28,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:26:28,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:26:28,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:26:28,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:26:28,081 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 03:26:28,142 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:26:28,143 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:26:28,307 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:26:28,341 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:26:28,342 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 03:26:28,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:26:28 BoogieIcfgContainer [2023-08-31 03:26:28,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:26:28,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:26:28,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:26:28,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:26:28,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:26:27" (1/3) ... [2023-08-31 03:26:28,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f8f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:26:28, skipping insertion in model container [2023-08-31 03:26:28,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:26:27" (2/3) ... [2023-08-31 03:26:28,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f8f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:26:28, skipping insertion in model container [2023-08-31 03:26:28,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:26:28" (3/3) ... [2023-08-31 03:26:28,350 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2023-08-31 03:26:28,354 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:26:28,369 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:26:28,369 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:26:28,369 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:26:28,479 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 03:26:28,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 128 transitions, 288 flow [2023-08-31 03:26:28,595 INFO L130 PetriNetUnfolder]: 10/124 cut-off events. [2023-08-31 03:26:28,596 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 03:26:28,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 124 events. 10/124 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-08-31 03:26:28,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 128 transitions, 288 flow [2023-08-31 03:26:28,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 112 transitions, 248 flow [2023-08-31 03:26:28,606 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:26:28,615 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 112 transitions, 248 flow [2023-08-31 03:26:28,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 112 transitions, 248 flow [2023-08-31 03:26:28,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 112 transitions, 248 flow [2023-08-31 03:26:28,653 INFO L130 PetriNetUnfolder]: 10/112 cut-off events. [2023-08-31 03:26:28,654 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 03:26:28,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 112 events. 10/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 94 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-08-31 03:26:28,657 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-08-31 03:26:31,672 INFO L134 LiptonReduction]: Checked pairs total: 2598 [2023-08-31 03:26:31,673 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-31 03:26:31,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:26:31,721 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;@6d256767, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:26:31,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 03:26:31,734 INFO L130 PetriNetUnfolder]: 4/28 cut-off events. [2023-08-31 03:26:31,734 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 03:26:31,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:31,735 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 03:26:31,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:31,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:31,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1971920350, now seen corresponding path program 1 times [2023-08-31 03:26:31,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:31,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386890781] [2023-08-31 03:26:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:31,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:32,183 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 03:26:32,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:32,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386890781] [2023-08-31 03:26:32,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386890781] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:26:32,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:26:32,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 03:26:32,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892920370] [2023-08-31 03:26:32,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:32,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 03:26:32,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:32,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 03:26:32,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 03:26:32,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 222 [2023-08-31 03:26:32,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 03:26:32,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:32,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 222 [2023-08-31 03:26:32,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:32,433 INFO L130 PetriNetUnfolder]: 1343/1736 cut-off events. [2023-08-31 03:26:32,433 INFO L131 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2023-08-31 03:26:32,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3612 conditions, 1736 events. 1343/1736 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5850 event pairs, 215 based on Foata normal form. 1/1054 useless extension candidates. Maximal degree in co-relation 2691. Up to 1515 conditions per place. [2023-08-31 03:26:32,441 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 39 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2023-08-31 03:26:32,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 233 flow [2023-08-31 03:26:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 03:26:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 03:26:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-08-31 03:26:32,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2023-08-31 03:26:32,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-08-31 03:26:32,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-08-31 03:26:32,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:32,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-08-31 03:26:32,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 03:26:32,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states 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 03:26:32,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states 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 03:26:32,461 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 372 transitions. [2023-08-31 03:26:32,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 233 flow [2023-08-31 03:26:32,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-31 03:26:32,466 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2023-08-31 03:26:32,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-31 03:26:32,469 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-08-31 03:26:32,469 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2023-08-31 03:26:32,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 03:26:32,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:32,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:26:32,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:26:32,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:32,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:32,471 INFO L85 PathProgramCache]: Analyzing trace with hash 550150448, now seen corresponding path program 1 times [2023-08-31 03:26:32,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:32,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441346706] [2023-08-31 03:26:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:32,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:32,574 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 03:26:32,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:32,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441346706] [2023-08-31 03:26:32,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441346706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:26:32,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:26:32,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:26:32,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118197663] [2023-08-31 03:26:32,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:32,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:26:32,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:32,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:26:32,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:26:32,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 222 [2023-08-31 03:26:32,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 03:26:32,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:32,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 222 [2023-08-31 03:26:32,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:32,874 INFO L130 PetriNetUnfolder]: 1929/2707 cut-off events. [2023-08-31 03:26:32,874 INFO L131 PetriNetUnfolder]: For 828/828 co-relation queries the response was YES. [2023-08-31 03:26:32,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6276 conditions, 2707 events. 1929/2707 cut-off events. For 828/828 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12322 event pairs, 489 based on Foata normal form. 304/2995 useless extension candidates. Maximal degree in co-relation 2470. Up to 1349 conditions per place. [2023-08-31 03:26:32,883 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 74 selfloop transitions, 4 changer transitions 2/82 dead transitions. [2023-08-31 03:26:32,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 82 transitions, 384 flow [2023-08-31 03:26:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:26:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:26:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 582 transitions. [2023-08-31 03:26:32,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243243243243243 [2023-08-31 03:26:32,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 582 transitions. [2023-08-31 03:26:32,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 582 transitions. [2023-08-31 03:26:32,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:32,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 582 transitions. [2023-08-31 03:26:32,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states 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 03:26:32,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 03:26:32,905 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 03:26:32,905 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 5 states and 582 transitions. [2023-08-31 03:26:32,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 82 transitions, 384 flow [2023-08-31 03:26:32,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 82 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:26:32,907 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 134 flow [2023-08-31 03:26:32,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-08-31 03:26:32,908 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-31 03:26:32,908 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 134 flow [2023-08-31 03:26:32,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 03:26:32,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:32,909 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, 1] [2023-08-31 03:26:32,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 03:26:32,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:32,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:32,909 INFO L85 PathProgramCache]: Analyzing trace with hash -634446788, now seen corresponding path program 2 times [2023-08-31 03:26:32,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:32,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084481494] [2023-08-31 03:26:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:32,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:32,978 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 03:26:32,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:32,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084481494] [2023-08-31 03:26:32,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084481494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:26:32,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:26:32,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 03:26:32,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509517957] [2023-08-31 03:26:32,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:32,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:26:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:32,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:26:32,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:26:32,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-31 03:26:32,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 03:26:32,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:32,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-31 03:26:32,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:33,235 INFO L130 PetriNetUnfolder]: 1807/2582 cut-off events. [2023-08-31 03:26:33,235 INFO L131 PetriNetUnfolder]: For 2758/3083 co-relation queries the response was YES. [2023-08-31 03:26:33,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7767 conditions, 2582 events. 1807/2582 cut-off events. For 2758/3083 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12128 event pairs, 489 based on Foata normal form. 400/2953 useless extension candidates. Maximal degree in co-relation 1682. Up to 1640 conditions per place. [2023-08-31 03:26:33,245 INFO L137 encePairwiseOnDemand]: 218/222 looper letters, 54 selfloop transitions, 4 changer transitions 7/69 dead transitions. [2023-08-31 03:26:33,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 69 transitions, 381 flow [2023-08-31 03:26:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:26:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:26:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-31 03:26:33,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292792792792793 [2023-08-31 03:26:33,247 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-31 03:26:33,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-31 03:26:33,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:33,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-31 03:26:33,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 03:26:33,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:33,250 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:33,250 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 134 flow. Second operand 4 states and 470 transitions. [2023-08-31 03:26:33,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 69 transitions, 381 flow [2023-08-31 03:26:33,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 69 transitions, 374 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 03:26:33,253 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 160 flow [2023-08-31 03:26:33,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-31 03:26:33,254 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-08-31 03:26:33,254 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 160 flow [2023-08-31 03:26:33,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 03:26:33,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:33,254 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, 1] [2023-08-31 03:26:33,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 03:26:33,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:33,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1967310179, now seen corresponding path program 1 times [2023-08-31 03:26:33,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:33,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845490097] [2023-08-31 03:26:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:33,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:33,359 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 03:26:33,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:33,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845490097] [2023-08-31 03:26:33,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845490097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:26:33,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:26:33,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:26:33,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912715522] [2023-08-31 03:26:33,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:33,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:26:33,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:33,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:26:33,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:26:33,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 222 [2023-08-31 03:26:33,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 03:26:33,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:33,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 222 [2023-08-31 03:26:33,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:33,706 INFO L130 PetriNetUnfolder]: 2391/3500 cut-off events. [2023-08-31 03:26:33,706 INFO L131 PetriNetUnfolder]: For 6576/6968 co-relation queries the response was YES. [2023-08-31 03:26:33,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10873 conditions, 3500 events. 2391/3500 cut-off events. For 6576/6968 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18396 event pairs, 729 based on Foata normal form. 569/4038 useless extension candidates. Maximal degree in co-relation 4402. Up to 1997 conditions per place. [2023-08-31 03:26:33,726 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 63 selfloop transitions, 5 changer transitions 18/88 dead transitions. [2023-08-31 03:26:33,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 88 transitions, 514 flow [2023-08-31 03:26:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:26:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:26:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 579 transitions. [2023-08-31 03:26:33,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216216216216216 [2023-08-31 03:26:33,729 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 579 transitions. [2023-08-31 03:26:33,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 579 transitions. [2023-08-31 03:26:33,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:33,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 579 transitions. [2023-08-31 03:26:33,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.8) internal successors, (579), 5 states have internal predecessors, (579), 0 states have call successors, (0), 0 states 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 03:26:33,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 03:26:33,734 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 03:26:33,734 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 160 flow. Second operand 5 states and 579 transitions. [2023-08-31 03:26:33,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 88 transitions, 514 flow [2023-08-31 03:26:33,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 88 transitions, 509 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 03:26:33,761 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 200 flow [2023-08-31 03:26:33,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-31 03:26:33,762 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-08-31 03:26:33,762 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 200 flow [2023-08-31 03:26:33,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 03:26:33,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:33,763 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, 1] [2023-08-31 03:26:33,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 03:26:33,763 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:33,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:33,764 INFO L85 PathProgramCache]: Analyzing trace with hash -630595977, now seen corresponding path program 2 times [2023-08-31 03:26:33,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:33,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959491318] [2023-08-31 03:26:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:33,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:33,839 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 03:26:33,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:33,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959491318] [2023-08-31 03:26:33,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959491318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:26:33,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:26:33,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 03:26:33,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128358964] [2023-08-31 03:26:33,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:33,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:26:33,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:33,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:26:33,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:26:33,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-31 03:26:33,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 03:26:33,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:33,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-31 03:26:33,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:34,268 INFO L130 PetriNetUnfolder]: 2636/3791 cut-off events. [2023-08-31 03:26:34,269 INFO L131 PetriNetUnfolder]: For 12510/13050 co-relation queries the response was YES. [2023-08-31 03:26:34,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14035 conditions, 3791 events. 2636/3791 cut-off events. For 12510/13050 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19034 event pairs, 704 based on Foata normal form. 474/4113 useless extension candidates. Maximal degree in co-relation 8693. Up to 1833 conditions per place. [2023-08-31 03:26:34,296 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 63 selfloop transitions, 10 changer transitions 1/79 dead transitions. [2023-08-31 03:26:34,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 570 flow [2023-08-31 03:26:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:26:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:26:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-31 03:26:34,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292792792792793 [2023-08-31 03:26:34,299 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-31 03:26:34,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-31 03:26:34,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:34,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-31 03:26:34,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 03:26:34,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:34,303 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:34,303 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 200 flow. Second operand 4 states and 470 transitions. [2023-08-31 03:26:34,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 570 flow [2023-08-31 03:26:34,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 549 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-31 03:26:34,319 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 321 flow [2023-08-31 03:26:34,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-31 03:26:34,319 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-08-31 03:26:34,320 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 321 flow [2023-08-31 03:26:34,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 03:26:34,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:34,320 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, 1] [2023-08-31 03:26:34,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 03:26:34,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:34,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:34,321 INFO L85 PathProgramCache]: Analyzing trace with hash 373265492, now seen corresponding path program 3 times [2023-08-31 03:26:34,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:34,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932804185] [2023-08-31 03:26:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:34,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:34,399 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 03:26:34,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:34,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932804185] [2023-08-31 03:26:34,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932804185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:26:34,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:26:34,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 03:26:34,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250848925] [2023-08-31 03:26:34,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:34,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:26:34,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:34,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:26:34,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:26:34,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-31 03:26:34,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 03:26:34,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:34,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-31 03:26:34,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:34,910 INFO L130 PetriNetUnfolder]: 3959/5512 cut-off events. [2023-08-31 03:26:34,910 INFO L131 PetriNetUnfolder]: For 27139/27835 co-relation queries the response was YES. [2023-08-31 03:26:34,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23963 conditions, 5512 events. 3959/5512 cut-off events. For 27139/27835 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27821 event pairs, 1419 based on Foata normal form. 655/6035 useless extension candidates. Maximal degree in co-relation 11708. Up to 3327 conditions per place. [2023-08-31 03:26:34,937 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 69 selfloop transitions, 19 changer transitions 5/97 dead transitions. [2023-08-31 03:26:34,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 97 transitions, 845 flow [2023-08-31 03:26:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:26:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:26:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-08-31 03:26:34,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304054054054054 [2023-08-31 03:26:34,939 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-08-31 03:26:34,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-08-31 03:26:34,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:34,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-08-31 03:26:34,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states 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 03:26:34,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:34,942 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:34,942 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 321 flow. Second operand 4 states and 471 transitions. [2023-08-31 03:26:34,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 97 transitions, 845 flow [2023-08-31 03:26:34,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 97 transitions, 810 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-31 03:26:34,963 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 542 flow [2023-08-31 03:26:34,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=542, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-31 03:26:34,963 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2023-08-31 03:26:34,963 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 542 flow [2023-08-31 03:26:34,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 03:26:34,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:34,964 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, 1] [2023-08-31 03:26:34,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 03:26:34,964 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:34,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:34,965 INFO L85 PathProgramCache]: Analyzing trace with hash 913151625, now seen corresponding path program 3 times [2023-08-31 03:26:34,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:34,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067072484] [2023-08-31 03:26:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:34,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:35,014 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 03:26:35,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:35,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067072484] [2023-08-31 03:26:35,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067072484] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:26:35,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:26:35,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 03:26:35,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272399824] [2023-08-31 03:26:35,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:35,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:26:35,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:35,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:26:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:26:35,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-31 03:26:35,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 542 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 03:26:35,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:35,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-31 03:26:35,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:35,599 INFO L130 PetriNetUnfolder]: 4069/5629 cut-off events. [2023-08-31 03:26:35,599 INFO L131 PetriNetUnfolder]: For 34585/35242 co-relation queries the response was YES. [2023-08-31 03:26:35,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26334 conditions, 5629 events. 4069/5629 cut-off events. For 34585/35242 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28061 event pairs, 1051 based on Foata normal form. 543/6085 useless extension candidates. Maximal degree in co-relation 17951. Up to 4642 conditions per place. [2023-08-31 03:26:35,640 INFO L137 encePairwiseOnDemand]: 218/222 looper letters, 70 selfloop transitions, 9 changer transitions 12/95 dead transitions. [2023-08-31 03:26:35,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 95 transitions, 932 flow [2023-08-31 03:26:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:26:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:26:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2023-08-31 03:26:35,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247747747747747 [2023-08-31 03:26:35,643 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2023-08-31 03:26:35,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2023-08-31 03:26:35,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:35,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2023-08-31 03:26:35,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 03:26:35,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:35,647 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:35,647 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 542 flow. Second operand 4 states and 466 transitions. [2023-08-31 03:26:35,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 95 transitions, 932 flow [2023-08-31 03:26:35,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 95 transitions, 922 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:26:35,671 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 588 flow [2023-08-31 03:26:35,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=588, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-31 03:26:35,672 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-08-31 03:26:35,672 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 588 flow [2023-08-31 03:26:35,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 03:26:35,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:35,673 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, 1] [2023-08-31 03:26:35,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 03:26:35,673 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:35,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:35,674 INFO L85 PathProgramCache]: Analyzing trace with hash -254193814, now seen corresponding path program 4 times [2023-08-31 03:26:35,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:35,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74248898] [2023-08-31 03:26:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:35,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:35,829 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 03:26:35,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:35,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74248898] [2023-08-31 03:26:35,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74248898] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:26:35,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:26:35,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:26:35,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919474629] [2023-08-31 03:26:35,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:35,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:26:35,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:35,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:26:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:26:35,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 222 [2023-08-31 03:26:35,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 588 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 03:26:35,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:35,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 222 [2023-08-31 03:26:35,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:36,549 INFO L130 PetriNetUnfolder]: 4191/5821 cut-off events. [2023-08-31 03:26:36,550 INFO L131 PetriNetUnfolder]: For 34875/35391 co-relation queries the response was YES. [2023-08-31 03:26:36,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27011 conditions, 5821 events. 4191/5821 cut-off events. For 34875/35391 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 29329 event pairs, 1433 based on Foata normal form. 467/6264 useless extension candidates. Maximal degree in co-relation 21531. Up to 4101 conditions per place. [2023-08-31 03:26:36,580 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 87 selfloop transitions, 16 changer transitions 21/126 dead transitions. [2023-08-31 03:26:36,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 126 transitions, 1224 flow [2023-08-31 03:26:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:26:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:26:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 679 transitions. [2023-08-31 03:26:36,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097597597597597 [2023-08-31 03:26:36,582 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 679 transitions. [2023-08-31 03:26:36,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 679 transitions. [2023-08-31 03:26:36,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:36,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 679 transitions. [2023-08-31 03:26:36,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.16666666666667) internal successors, (679), 6 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:36,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states 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 03:26:36,586 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states 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 03:26:36,586 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 588 flow. Second operand 6 states and 679 transitions. [2023-08-31 03:26:36,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 126 transitions, 1224 flow [2023-08-31 03:26:36,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 126 transitions, 1176 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-31 03:26:36,604 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 691 flow [2023-08-31 03:26:36,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=691, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2023-08-31 03:26:36,606 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-08-31 03:26:36,606 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 691 flow [2023-08-31 03:26:36,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 03:26:36,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:36,607 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, 1] [2023-08-31 03:26:36,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 03:26:36,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:36,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:36,613 INFO L85 PathProgramCache]: Analyzing trace with hash 48622009, now seen corresponding path program 4 times [2023-08-31 03:26:36,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:36,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504768969] [2023-08-31 03:26:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:36,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:36,688 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 03:26:36,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:36,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504768969] [2023-08-31 03:26:36,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504768969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:26:36,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:26:36,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 03:26:36,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603732775] [2023-08-31 03:26:36,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:36,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:26:36,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:36,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:26:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:26:36,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-31 03:26:36,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 691 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 03:26:36,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:36,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-31 03:26:36,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:37,243 INFO L130 PetriNetUnfolder]: 5266/7366 cut-off events. [2023-08-31 03:26:37,243 INFO L131 PetriNetUnfolder]: For 67702/70243 co-relation queries the response was YES. [2023-08-31 03:26:37,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35154 conditions, 7366 events. 5266/7366 cut-off events. For 67702/70243 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 38692 event pairs, 1726 based on Foata normal form. 1773/8952 useless extension candidates. Maximal degree in co-relation 26456. Up to 4880 conditions per place. [2023-08-31 03:26:37,279 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 117 selfloop transitions, 6 changer transitions 0/129 dead transitions. [2023-08-31 03:26:37,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 129 transitions, 1596 flow [2023-08-31 03:26:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:26:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:26:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 464 transitions. [2023-08-31 03:26:37,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225225225225225 [2023-08-31 03:26:37,281 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 464 transitions. [2023-08-31 03:26:37,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 464 transitions. [2023-08-31 03:26:37,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:37,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 464 transitions. [2023-08-31 03:26:37,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 03:26:37,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:37,283 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:37,283 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 691 flow. Second operand 4 states and 464 transitions. [2023-08-31 03:26:37,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 129 transitions, 1596 flow [2023-08-31 03:26:37,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 129 transitions, 1533 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-31 03:26:37,299 INFO L231 Difference]: Finished difference. Result has 65 places, 71 transitions, 809 flow [2023-08-31 03:26:37,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=809, PETRI_PLACES=65, PETRI_TRANSITIONS=71} [2023-08-31 03:26:37,300 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2023-08-31 03:26:37,300 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 71 transitions, 809 flow [2023-08-31 03:26:37,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 03:26:37,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:37,301 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, 1] [2023-08-31 03:26:37,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 03:26:37,301 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:37,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:37,301 INFO L85 PathProgramCache]: Analyzing trace with hash -234274435, now seen corresponding path program 5 times [2023-08-31 03:26:37,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:37,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230975327] [2023-08-31 03:26:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:37,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:37,411 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 03:26:37,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:37,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230975327] [2023-08-31 03:26:37,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230975327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:26:37,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:26:37,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 03:26:37,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468125244] [2023-08-31 03:26:37,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:37,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:26:37,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:26:37,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:26:37,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-31 03:26:37,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 71 transitions, 809 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 03:26:37,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:37,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-31 03:26:37,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:37,999 INFO L130 PetriNetUnfolder]: 4779/6700 cut-off events. [2023-08-31 03:26:37,999 INFO L131 PetriNetUnfolder]: For 55435/57405 co-relation queries the response was YES. [2023-08-31 03:26:38,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36636 conditions, 6700 events. 4779/6700 cut-off events. For 55435/57405 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 34177 event pairs, 1447 based on Foata normal form. 1495/8061 useless extension candidates. Maximal degree in co-relation 29093. Up to 4406 conditions per place. [2023-08-31 03:26:38,027 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 82 selfloop transitions, 15 changer transitions 12/115 dead transitions. [2023-08-31 03:26:38,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 1347 flow [2023-08-31 03:26:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:26:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:26:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-31 03:26:38,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292792792792793 [2023-08-31 03:26:38,029 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-31 03:26:38,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-31 03:26:38,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:38,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-31 03:26:38,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 03:26:38,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:38,031 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:38,031 INFO L175 Difference]: Start difference. First operand has 65 places, 71 transitions, 809 flow. Second operand 4 states and 470 transitions. [2023-08-31 03:26:38,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 1347 flow [2023-08-31 03:26:38,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 1328 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 03:26:38,048 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 876 flow [2023-08-31 03:26:38,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=876, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2023-08-31 03:26:38,049 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-08-31 03:26:38,049 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 876 flow [2023-08-31 03:26:38,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 03:26:38,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:38,049 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, 1, 1] [2023-08-31 03:26:38,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 03:26:38,050 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:38,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:38,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1251327380, now seen corresponding path program 1 times [2023-08-31 03:26:38,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:38,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829446584] [2023-08-31 03:26:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:38,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:26:38,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:38,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829446584] [2023-08-31 03:26:38,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829446584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:26:38,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:26:38,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:26:38,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600626216] [2023-08-31 03:26:38,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:38,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:26:38,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:38,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:26:38,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:26:38,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 222 [2023-08-31 03:26:38,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 876 flow. Second operand has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 03:26:38,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:38,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 222 [2023-08-31 03:26:38,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:38,521 INFO L130 PetriNetUnfolder]: 4201/5794 cut-off events. [2023-08-31 03:26:38,521 INFO L131 PetriNetUnfolder]: For 59445/60555 co-relation queries the response was YES. [2023-08-31 03:26:38,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32881 conditions, 5794 events. 4201/5794 cut-off events. For 59445/60555 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27820 event pairs, 1667 based on Foata normal form. 1024/6763 useless extension candidates. Maximal degree in co-relation 26313. Up to 4049 conditions per place. [2023-08-31 03:26:38,549 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 78 selfloop transitions, 13 changer transitions 18/112 dead transitions. [2023-08-31 03:26:38,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 1365 flow [2023-08-31 03:26:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:26:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:26:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 560 transitions. [2023-08-31 03:26:38,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045045045045045 [2023-08-31 03:26:38,552 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 560 transitions. [2023-08-31 03:26:38,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 560 transitions. [2023-08-31 03:26:38,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:38,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 560 transitions. [2023-08-31 03:26:38,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 03:26:38,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 03:26:38,555 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 03:26:38,555 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 876 flow. Second operand 5 states and 560 transitions. [2023-08-31 03:26:38,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 1365 flow [2023-08-31 03:26:38,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 1304 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-31 03:26:38,585 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 874 flow [2023-08-31 03:26:38,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=874, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-08-31 03:26:38,586 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2023-08-31 03:26:38,586 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 874 flow [2023-08-31 03:26:38,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 03:26:38,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:38,587 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, 1, 1] [2023-08-31 03:26:38,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 03:26:38,587 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:38,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:38,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1898023995, now seen corresponding path program 1 times [2023-08-31 03:26:38,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:38,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130798994] [2023-08-31 03:26:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:38,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:38,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:38,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130798994] [2023-08-31 03:26:38,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130798994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:26:38,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:26:38,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:26:38,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707722388] [2023-08-31 03:26:38,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:38,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:26:38,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:38,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:26:38,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:26:38,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 222 [2023-08-31 03:26:38,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 874 flow. Second operand has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 03:26:38,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:38,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 222 [2023-08-31 03:26:38,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:39,220 INFO L130 PetriNetUnfolder]: 4197/5653 cut-off events. [2023-08-31 03:26:39,220 INFO L131 PetriNetUnfolder]: For 59686/60734 co-relation queries the response was YES. [2023-08-31 03:26:39,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34240 conditions, 5653 events. 4197/5653 cut-off events. For 59686/60734 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 25502 event pairs, 1565 based on Foata normal form. 1008/6589 useless extension candidates. Maximal degree in co-relation 30326. Up to 4391 conditions per place. [2023-08-31 03:26:39,269 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 83 selfloop transitions, 29 changer transitions 6/121 dead transitions. [2023-08-31 03:26:39,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 1562 flow [2023-08-31 03:26:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:26:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:26:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 562 transitions. [2023-08-31 03:26:39,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063063063063064 [2023-08-31 03:26:39,271 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 562 transitions. [2023-08-31 03:26:39,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 562 transitions. [2023-08-31 03:26:39,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:39,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 562 transitions. [2023-08-31 03:26:39,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 03:26:39,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 03:26:39,274 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 03:26:39,274 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 874 flow. Second operand 5 states and 562 transitions. [2023-08-31 03:26:39,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 1562 flow [2023-08-31 03:26:39,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 1428 flow, removed 52 selfloop flow, removed 4 redundant places. [2023-08-31 03:26:39,313 INFO L231 Difference]: Finished difference. Result has 71 places, 86 transitions, 1079 flow [2023-08-31 03:26:39,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1079, PETRI_PLACES=71, PETRI_TRANSITIONS=86} [2023-08-31 03:26:39,313 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-08-31 03:26:39,313 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 86 transitions, 1079 flow [2023-08-31 03:26:39,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 03:26:39,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:39,314 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, 1, 1, 1] [2023-08-31 03:26:39,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 03:26:39,314 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:39,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:39,315 INFO L85 PathProgramCache]: Analyzing trace with hash 967516647, now seen corresponding path program 1 times [2023-08-31 03:26:39,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:39,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618538429] [2023-08-31 03:26:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:39,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:39,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:39,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618538429] [2023-08-31 03:26:39,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618538429] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:26:39,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133659964] [2023-08-31 03:26:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:39,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:26:39,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:26:39,465 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 03:26:39,529 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 03:26:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:39,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 03:26:39,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:26:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:39,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:26:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:39,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133659964] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:26:39,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:26:39,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-31 03:26:39,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687869973] [2023-08-31 03:26:39,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:26:39,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:26:39,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:39,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:26:39,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-31 03:26:39,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-31 03:26:39,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 86 transitions, 1079 flow. Second operand has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states 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 03:26:39,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:39,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-31 03:26:39,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:40,403 INFO L130 PetriNetUnfolder]: 5554/7244 cut-off events. [2023-08-31 03:26:40,404 INFO L131 PetriNetUnfolder]: For 84222/86425 co-relation queries the response was YES. [2023-08-31 03:26:40,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45650 conditions, 7244 events. 5554/7244 cut-off events. For 84222/86425 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31186 event pairs, 1070 based on Foata normal form. 1098/8191 useless extension candidates. Maximal degree in co-relation 36019. Up to 6002 conditions per place. [2023-08-31 03:26:40,450 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 116 selfloop transitions, 19 changer transitions 1/143 dead transitions. [2023-08-31 03:26:40,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 143 transitions, 1973 flow [2023-08-31 03:26:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:26:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:26:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2023-08-31 03:26:40,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180180180180181 [2023-08-31 03:26:40,452 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2023-08-31 03:26:40,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2023-08-31 03:26:40,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:40,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2023-08-31 03:26:40,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 03:26:40,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:40,455 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:40,455 INFO L175 Difference]: Start difference. First operand has 71 places, 86 transitions, 1079 flow. Second operand 4 states and 460 transitions. [2023-08-31 03:26:40,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 143 transitions, 1973 flow [2023-08-31 03:26:40,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 143 transitions, 1871 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-08-31 03:26:40,487 INFO L231 Difference]: Finished difference. Result has 70 places, 93 transitions, 1158 flow [2023-08-31 03:26:40,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1158, PETRI_PLACES=70, PETRI_TRANSITIONS=93} [2023-08-31 03:26:40,488 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-08-31 03:26:40,488 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 93 transitions, 1158 flow [2023-08-31 03:26:40,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states 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 03:26:40,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:40,489 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, 1, 1, 1] [2023-08-31 03:26:40,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 03:26:40,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 03:26:40,693 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:40,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:40,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1526123081, now seen corresponding path program 2 times [2023-08-31 03:26:40,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:40,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990712540] [2023-08-31 03:26:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:40,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:26:40,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:40,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990712540] [2023-08-31 03:26:40,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990712540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:26:40,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948131657] [2023-08-31 03:26:40,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:26:40,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:26:40,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:26:40,835 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 03:26:40,837 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 03:26:40,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:26:40,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:26:40,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 03:26:40,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:26:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:26:41,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:26:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:26:41,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948131657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:26:41,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:26:41,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 03:26:41,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344232475] [2023-08-31 03:26:41,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:26:41,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 03:26:41,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:41,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 03:26:41,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-31 03:26:41,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 222 [2023-08-31 03:26:41,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 93 transitions, 1158 flow. Second operand has 8 states, 8 states have (on average 103.5) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 03:26:41,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:41,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 222 [2023-08-31 03:26:41,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:41,987 INFO L130 PetriNetUnfolder]: 6710/8604 cut-off events. [2023-08-31 03:26:41,987 INFO L131 PetriNetUnfolder]: For 104664/105795 co-relation queries the response was YES. [2023-08-31 03:26:42,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57175 conditions, 8604 events. 6710/8604 cut-off events. For 104664/105795 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 35602 event pairs, 1400 based on Foata normal form. 1197/9756 useless extension candidates. Maximal degree in co-relation 41583. Up to 5421 conditions per place. [2023-08-31 03:26:42,029 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 135 selfloop transitions, 97 changer transitions 2/239 dead transitions. [2023-08-31 03:26:42,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 239 transitions, 3638 flow [2023-08-31 03:26:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:26:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:26:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 669 transitions. [2023-08-31 03:26:42,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022522522522522 [2023-08-31 03:26:42,032 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 669 transitions. [2023-08-31 03:26:42,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 669 transitions. [2023-08-31 03:26:42,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:42,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 669 transitions. [2023-08-31 03:26:42,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.5) internal successors, (669), 6 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 03:26:42,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states 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 03:26:42,035 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states 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 03:26:42,035 INFO L175 Difference]: Start difference. First operand has 70 places, 93 transitions, 1158 flow. Second operand 6 states and 669 transitions. [2023-08-31 03:26:42,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 239 transitions, 3638 flow [2023-08-31 03:26:42,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 239 transitions, 3376 flow, removed 114 selfloop flow, removed 1 redundant places. [2023-08-31 03:26:42,076 INFO L231 Difference]: Finished difference. Result has 77 places, 175 transitions, 2755 flow [2023-08-31 03:26:42,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2755, PETRI_PLACES=77, PETRI_TRANSITIONS=175} [2023-08-31 03:26:42,077 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-08-31 03:26:42,077 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 175 transitions, 2755 flow [2023-08-31 03:26:42,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 103.5) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 03:26:42,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:42,078 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, 1, 1, 1, 1] [2023-08-31 03:26:42,085 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 03:26:42,289 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,SelfDestructingSolverStorable13 [2023-08-31 03:26:42,289 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:42,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:42,290 INFO L85 PathProgramCache]: Analyzing trace with hash 423727133, now seen corresponding path program 1 times [2023-08-31 03:26:42,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:42,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452281548] [2023-08-31 03:26:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:42,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:26:42,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:42,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452281548] [2023-08-31 03:26:42,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452281548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:26:42,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198762590] [2023-08-31 03:26:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:42,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:26:42,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:26:42,407 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 03:26:42,409 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 03:26:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:42,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 03:26:42,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:26:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:26:42,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:26:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:26:42,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198762590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:26:42,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:26:42,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-31 03:26:42,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123862293] [2023-08-31 03:26:42,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:26:42,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 03:26:42,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:42,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 03:26:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-31 03:26:42,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 222 [2023-08-31 03:26:42,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 175 transitions, 2755 flow. Second operand has 8 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states 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 03:26:42,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:42,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 222 [2023-08-31 03:26:42,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:44,148 INFO L130 PetriNetUnfolder]: 12306/16025 cut-off events. [2023-08-31 03:26:44,148 INFO L131 PetriNetUnfolder]: For 236807/241514 co-relation queries the response was YES. [2023-08-31 03:26:44,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110797 conditions, 16025 events. 12306/16025 cut-off events. For 236807/241514 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 76960 event pairs, 1296 based on Foata normal form. 3116/17982 useless extension candidates. Maximal degree in co-relation 98264. Up to 10285 conditions per place. [2023-08-31 03:26:44,299 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 162 selfloop transitions, 167 changer transitions 3/344 dead transitions. [2023-08-31 03:26:44,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 344 transitions, 5614 flow [2023-08-31 03:26:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:26:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:26:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 495 transitions. [2023-08-31 03:26:44,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574324324324325 [2023-08-31 03:26:44,301 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 495 transitions. [2023-08-31 03:26:44,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 495 transitions. [2023-08-31 03:26:44,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:44,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 495 transitions. [2023-08-31 03:26:44,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 03:26:44,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:44,305 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 03:26:44,305 INFO L175 Difference]: Start difference. First operand has 77 places, 175 transitions, 2755 flow. Second operand 4 states and 495 transitions. [2023-08-31 03:26:44,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 344 transitions, 5614 flow [2023-08-31 03:26:44,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 344 transitions, 5400 flow, removed 84 selfloop flow, removed 2 redundant places. [2023-08-31 03:26:44,478 INFO L231 Difference]: Finished difference. Result has 79 places, 307 transitions, 5508 flow [2023-08-31 03:26:44,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5508, PETRI_PLACES=79, PETRI_TRANSITIONS=307} [2023-08-31 03:26:44,479 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-08-31 03:26:44,479 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 307 transitions, 5508 flow [2023-08-31 03:26:44,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states 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 03:26:44,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:44,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:26:44,486 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 03:26:44,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:26:44,686 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:44,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:44,686 INFO L85 PathProgramCache]: Analyzing trace with hash 147049617, now seen corresponding path program 2 times [2023-08-31 03:26:44,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:44,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218491451] [2023-08-31 03:26:44,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:44,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:44,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218491451] [2023-08-31 03:26:44,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218491451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:26:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932321244] [2023-08-31 03:26:44,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:26:44,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:26:44,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:26:44,830 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 03:26:44,833 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 03:26:45,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:26:45,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:26:45,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 03:26:45,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:26:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:45,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:26:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:45,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932321244] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:26:45,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:26:45,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-31 03:26:45,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628353805] [2023-08-31 03:26:45,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:26:45,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 03:26:45,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:45,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 03:26:45,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-31 03:26:45,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 222 [2023-08-31 03:26:45,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 307 transitions, 5508 flow. Second operand has 9 states, 9 states have (on average 112.66666666666667) internal successors, (1014), 9 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 03:26:45,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:45,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 222 [2023-08-31 03:26:45,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:48,126 INFO L130 PetriNetUnfolder]: 23620/30836 cut-off events. [2023-08-31 03:26:48,126 INFO L131 PetriNetUnfolder]: For 595698/603632 co-relation queries the response was YES. [2023-08-31 03:26:48,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239377 conditions, 30836 events. 23620/30836 cut-off events. For 595698/603632 co-relation queries the response was YES. Maximal size of possible extension queue 1530. Compared 162725 event pairs, 2059 based on Foata normal form. 4919/33922 useless extension candidates. Maximal degree in co-relation 212854. Up to 19599 conditions per place. [2023-08-31 03:26:48,411 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 181 selfloop transitions, 379 changer transitions 3/575 dead transitions. [2023-08-31 03:26:48,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 575 transitions, 10577 flow [2023-08-31 03:26:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:26:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:26:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 624 transitions. [2023-08-31 03:26:48,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5621621621621622 [2023-08-31 03:26:48,413 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 624 transitions. [2023-08-31 03:26:48,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 624 transitions. [2023-08-31 03:26:48,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:48,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 624 transitions. [2023-08-31 03:26:48,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states 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 03:26:48,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 03:26:48,416 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 03:26:48,416 INFO L175 Difference]: Start difference. First operand has 79 places, 307 transitions, 5508 flow. Second operand 5 states and 624 transitions. [2023-08-31 03:26:48,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 575 transitions, 10577 flow [2023-08-31 03:26:48,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 575 transitions, 10383 flow, removed 97 selfloop flow, removed 0 redundant places. [2023-08-31 03:26:49,012 INFO L231 Difference]: Finished difference. Result has 85 places, 519 transitions, 10439 flow [2023-08-31 03:26:49,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=5314, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10439, PETRI_PLACES=85, PETRI_TRANSITIONS=519} [2023-08-31 03:26:49,024 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2023-08-31 03:26:49,025 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 519 transitions, 10439 flow [2023-08-31 03:26:49,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.66666666666667) internal successors, (1014), 9 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 03:26:49,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:49,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 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 03:26:49,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 03:26:49,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 03:26:49,231 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:26:49,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash 263795595, now seen corresponding path program 3 times [2023-08-31 03:26:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:49,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062983605] [2023-08-31 03:26:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:49,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:26:49,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:49,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062983605] [2023-08-31 03:26:49,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062983605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:26:49,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629159233] [2023-08-31 03:26:49,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:26:49,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:26:49,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:26:49,453 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 03:26:49,456 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 03:26:49,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:26:49,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:26:49,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:26:49,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:26:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:26:49,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:26:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:26:49,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629159233] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:26:49,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:26:49,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-31 03:26:49,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040972356] [2023-08-31 03:26:49,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:26:49,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 03:26:49,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:49,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 03:26:49,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-31 03:26:49,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 222 [2023-08-31 03:26:49,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 519 transitions, 10439 flow. Second operand has 14 states, 14 states have (on average 100.92857142857143) internal successors, (1413), 14 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:49,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:49,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 222 [2023-08-31 03:26:49,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:27:05,205 INFO L130 PetriNetUnfolder]: 73165/99419 cut-off events. [2023-08-31 03:27:05,206 INFO L131 PetriNetUnfolder]: For 1652660/1658110 co-relation queries the response was YES. [2023-08-31 03:27:05,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736479 conditions, 99419 events. 73165/99419 cut-off events. For 1652660/1658110 co-relation queries the response was YES. Maximal size of possible extension queue 3861. Compared 647629 event pairs, 2626 based on Foata normal form. 7292/106701 useless extension candidates. Maximal degree in co-relation 696923. Up to 41573 conditions per place. [2023-08-31 03:27:06,288 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 2496 selfloop transitions, 935 changer transitions 0/3434 dead transitions. [2023-08-31 03:27:06,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 3434 transitions, 69490 flow [2023-08-31 03:27:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-31 03:27:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-31 03:27:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5120 transitions. [2023-08-31 03:27:06,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4907034694268737 [2023-08-31 03:27:06,318 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5120 transitions. [2023-08-31 03:27:06,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5120 transitions. [2023-08-31 03:27:06,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:27:06,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5120 transitions. [2023-08-31 03:27:06,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 108.93617021276596) internal successors, (5120), 47 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states 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 03:27:06,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 222.0) internal successors, (10656), 48 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states 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 03:27:06,345 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 222.0) internal successors, (10656), 48 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states 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 03:27:06,345 INFO L175 Difference]: Start difference. First operand has 85 places, 519 transitions, 10439 flow. Second operand 47 states and 5120 transitions. [2023-08-31 03:27:06,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 3434 transitions, 69490 flow [2023-08-31 03:27:12,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 3434 transitions, 65338 flow, removed 2076 selfloop flow, removed 0 redundant places. [2023-08-31 03:27:12,118 INFO L231 Difference]: Finished difference. Result has 169 places, 1477 transitions, 31404 flow [2023-08-31 03:27:12,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=9821, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=31404, PETRI_PLACES=169, PETRI_TRANSITIONS=1477} [2023-08-31 03:27:12,119 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 131 predicate places. [2023-08-31 03:27:12,119 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 1477 transitions, 31404 flow [2023-08-31 03:27:12,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 100.92857142857143) internal successors, (1413), 14 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:27:12,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:27:12,120 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 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 03:27:12,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 03:27:12,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 03:27:12,325 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:27:12,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:27:12,325 INFO L85 PathProgramCache]: Analyzing trace with hash -560273567, now seen corresponding path program 4 times [2023-08-31 03:27:12,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:27:12,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466916919] [2023-08-31 03:27:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:27:12,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:27:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:27:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:27:12,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:27:12,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466916919] [2023-08-31 03:27:12,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466916919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:27:12,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956633138] [2023-08-31 03:27:12,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:27:12,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:27:12,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:27:12,465 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 03:27:12,485 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 03:27:12,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:27:12,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:27:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:27:12,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:27:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:27:12,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:27:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:27:12,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956633138] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:27:12,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:27:12,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-31 03:27:12,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950658338] [2023-08-31 03:27:12,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:27:12,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 03:27:12,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:27:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 03:27:12,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-08-31 03:27:12,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 222 [2023-08-31 03:27:12,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 1477 transitions, 31404 flow. Second operand has 14 states, 14 states have (on average 99.28571428571429) internal successors, (1390), 14 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states 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 03:27:12,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:27:12,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 222 [2023-08-31 03:27:12,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:28:21,088 INFO L130 PetriNetUnfolder]: 182421/252798 cut-off events. [2023-08-31 03:28:21,088 INFO L131 PetriNetUnfolder]: For 7924589/7928551 co-relation queries the response was YES. [2023-08-31 03:28:24,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2305237 conditions, 252798 events. 182421/252798 cut-off events. For 7924589/7928551 co-relation queries the response was YES. Maximal size of possible extension queue 9717. Compared 1890504 event pairs, 7429 based on Foata normal form. 8952/261746 useless extension candidates. Maximal degree in co-relation 2174794. Up to 91989 conditions per place. [2023-08-31 03:28:25,932 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 4077 selfloop transitions, 2849 changer transitions 108/7052 dead transitions. [2023-08-31 03:28:25,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 7052 transitions, 157459 flow [2023-08-31 03:28:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-31 03:28:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-31 03:28:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 8104 transitions. [2023-08-31 03:28:25,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48672672672672673 [2023-08-31 03:28:25,964 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 8104 transitions. [2023-08-31 03:28:25,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 8104 transitions. [2023-08-31 03:28:25,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:28:25,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 8104 transitions. [2023-08-31 03:28:25,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 108.05333333333333) internal successors, (8104), 75 states have internal predecessors, (8104), 0 states have call successors, (0), 0 states 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 03:28:25,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 222.0) internal successors, (16872), 76 states have internal predecessors, (16872), 0 states have call successors, (0), 0 states 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 03:28:25,991 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 222.0) internal successors, (16872), 76 states have internal predecessors, (16872), 0 states have call successors, (0), 0 states 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 03:28:25,992 INFO L175 Difference]: Start difference. First operand has 169 places, 1477 transitions, 31404 flow. Second operand 75 states and 8104 transitions. [2023-08-31 03:28:25,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 7052 transitions, 157459 flow Killed by 15