./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-proofs-counter-add-4-semi-Q67.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 ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:29:12,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:29:12,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:29:13,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:29:13,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:29:13,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:29:13,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:29:13,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:29:13,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:29:13,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:29:13,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:29:13,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:29:13,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:29:13,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:29:13,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:29:13,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:29:13,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:29:13,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:29:13,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:29:13,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:29:13,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:29:13,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:29:13,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:29:13,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:29:13,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:29:13,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:29:13,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:29:13,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:29:13,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:29:13,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:29:13,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:29:13,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:29:13,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:29:13,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:29:13,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:29:13,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:29:13,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:29:13,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:29:13,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:29:13,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:29:13,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:29:13,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:29:13,090 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:29:13,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:29:13,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:29:13,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:29:13,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:29:13,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:29:13,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:29:13,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:29:13,093 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:29:13,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:29:13,094 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:29:13,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:29:13,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:29:13,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:29:13,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:29:13,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:29:13,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:29:13,094 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:29:13,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:29:13,095 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:29:13,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:29:13,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:29:13,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:29:13,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:29:13,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:29:13,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:29:13,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:29:13,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:29:13,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:29:13,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:29:13,096 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:29:13,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:29:13,097 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:29:13,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:29:13,097 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:29:13,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:29:13,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:29:13,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:29:13,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:29:13,358 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:29:13,359 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:29:13,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-09-01 14:29:14,263 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:29:14,438 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:29:14,439 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-09-01 14:29:14,445 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4ecfca5b/b2698ea3cc06423f88fd8ba2b17a84d6/FLAGe5d2f762d [2023-09-01 14:29:14,454 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4ecfca5b/b2698ea3cc06423f88fd8ba2b17a84d6 [2023-09-01 14:29:14,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:29:14,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:29:14,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:29:14,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:29:14,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:29:14,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10fba31c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14, skipping insertion in model container [2023-09-01 14:29:14,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:29:14,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:29:14,625 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-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2023-09-01 14:29:14,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:29:14,639 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:29:14,669 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-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2023-09-01 14:29:14,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:29:14,678 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:29:14,679 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:29:14,683 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:29:14,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14 WrapperNode [2023-09-01 14:29:14,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:29:14,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:29:14,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:29:14,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:29:14,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,727 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2023-09-01 14:29:14,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:29:14,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:29:14,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:29:14,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:29:14,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:29:14,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:29:14,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:29:14,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:29:14,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14" (1/1) ... [2023-09-01 14:29:14,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:29:14,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:29:14,789 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) [2023-09-01 14:29:14,809 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 [2023-09-01 14:29:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:29:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:29:14,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:29:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:29:14,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:29:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 14:29:14,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 14:29:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 14:29:14,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 14:29:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:29:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:29:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:29:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:29:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:29:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:29:14,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:29:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:29:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:29:14,831 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:29:14,901 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:29:14,903 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:29:15,152 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:29:15,201 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:29:15,201 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 14:29:15,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:29:15 BoogieIcfgContainer [2023-09-01 14:29:15,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:29:15,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:29:15,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:29:15,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:29:15,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:29:14" (1/3) ... [2023-09-01 14:29:15,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cfb4bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:29:15, skipping insertion in model container [2023-09-01 14:29:15,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:14" (2/3) ... [2023-09-01 14:29:15,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cfb4bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:29:15, skipping insertion in model container [2023-09-01 14:29:15,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:29:15" (3/3) ... [2023-09-01 14:29:15,209 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-09-01 14:29:15,213 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:29:15,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:29:15,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:29:15,221 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:29:15,270 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 14:29:15,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 128 transitions, 288 flow [2023-09-01 14:29:15,330 INFO L130 PetriNetUnfolder]: 10/124 cut-off events. [2023-09-01 14:29:15,330 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 14:29:15,333 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 45 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-09-01 14:29:15,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 128 transitions, 288 flow [2023-09-01 14:29:15,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 112 transitions, 248 flow [2023-09-01 14:29:15,338 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:29:15,343 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 112 transitions, 248 flow [2023-09-01 14:29:15,345 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 112 transitions, 248 flow [2023-09-01 14:29:15,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 112 transitions, 248 flow [2023-09-01 14:29:15,384 INFO L130 PetriNetUnfolder]: 10/112 cut-off events. [2023-09-01 14:29:15,384 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 14:29:15,385 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 46 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-09-01 14:29:15,386 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224 [2023-09-01 14:29:18,463 INFO L134 LiptonReduction]: Checked pairs total: 1470 [2023-09-01 14:29:18,464 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-09-01 14:29:18,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:29:18,488 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;@23250387, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:29:18,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-09-01 14:29:18,500 INFO L130 PetriNetUnfolder]: 4/24 cut-off events. [2023-09-01 14:29:18,500 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 14:29:18,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:29:18,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:29:18,501 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)] === [2023-09-01 14:29:18,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:29:18,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1331677596, now seen corresponding path program 1 times [2023-09-01 14:29:18,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:29:18,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585887986] [2023-09-01 14:29:18,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:18,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:29:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:29:18,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:29:18,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585887986] [2023-09-01 14:29:18,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585887986] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:29:18,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:29:18,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 14:29:18,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298928721] [2023-09-01 14:29:18,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:29:18,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:29:18,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:29:18,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:29:18,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:29:18,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 228 [2023-09-01 14:29:18,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 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) [2023-09-01 14:29:18,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:29:18,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 228 [2023-09-01 14:29:18,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:29:18,959 INFO L130 PetriNetUnfolder]: 431/611 cut-off events. [2023-09-01 14:29:18,960 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-09-01 14:29:18,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 611 events. 431/611 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1720 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 928. Up to 405 conditions per place. [2023-09-01 14:29:18,963 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 39 selfloop transitions, 3 changer transitions 3/45 dead transitions. [2023-09-01 14:29:18,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 225 flow [2023-09-01 14:29:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:29:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:29:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-09-01 14:29:18,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2023-09-01 14:29:18,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-09-01 14:29:18,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-09-01 14:29:18,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:29:18,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-09-01 14:29:18,978 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) [2023-09-01 14:29:18,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 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) [2023-09-01 14:29:18,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 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) [2023-09-01 14:29:18,982 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 372 transitions. [2023-09-01 14:29:18,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 225 flow [2023-09-01 14:29:18,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 45 transitions, 195 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 14:29:18,985 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 81 flow [2023-09-01 14:29:18,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2023-09-01 14:29:18,989 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2023-09-01 14:29:18,989 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 81 flow [2023-09-01 14:29:18,989 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) [2023-09-01 14:29:18,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:29:18,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:29:18,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:29:18,990 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)] === [2023-09-01 14:29:18,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:29:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1009097346, now seen corresponding path program 1 times [2023-09-01 14:29:18,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:29:18,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79057698] [2023-09-01 14:29:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:18,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:29:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:29:19,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:29:19,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79057698] [2023-09-01 14:29:19,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79057698] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:29:19,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:29:19,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:29:19,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230049149] [2023-09-01 14:29:19,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:29:19,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:29:19,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:29:19,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:29:19,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:29:19,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2023-09-01 14:29:19,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:19,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:29:19,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2023-09-01 14:29:19,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:29:19,382 INFO L130 PetriNetUnfolder]: 395/575 cut-off events. [2023-09-01 14:29:19,382 INFO L131 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2023-09-01 14:29:19,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 575 events. 395/575 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1711 event pairs, 45 based on Foata normal form. 36/611 useless extension candidates. Maximal degree in co-relation 474. Up to 369 conditions per place. [2023-09-01 14:29:19,386 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 33 selfloop transitions, 3 changer transitions 20/56 dead transitions. [2023-09-01 14:29:19,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 56 transitions, 261 flow [2023-09-01 14:29:19,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:29:19,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:29:19,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 450 transitions. [2023-09-01 14:29:19,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934210526315789 [2023-09-01 14:29:19,391 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 450 transitions. [2023-09-01 14:29:19,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 450 transitions. [2023-09-01 14:29:19,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:29:19,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 450 transitions. [2023-09-01 14:29:19,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:19,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:19,397 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:19,397 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 81 flow. Second operand 4 states and 450 transitions. [2023-09-01 14:29:19,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 56 transitions, 261 flow [2023-09-01 14:29:19,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 56 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:29:19,399 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 91 flow [2023-09-01 14:29:19,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-09-01 14:29:19,399 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-09-01 14:29:19,400 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 91 flow [2023-09-01 14:29:19,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:19,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:29:19,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:29:19,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:29:19,401 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)] === [2023-09-01 14:29:19,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:29:19,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1082201917, now seen corresponding path program 1 times [2023-09-01 14:29:19,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:29:19,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244248923] [2023-09-01 14:29:19,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:19,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:29:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:29:19,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:29:19,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244248923] [2023-09-01 14:29:19,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244248923] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:29:19,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919643035] [2023-09-01 14:29:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:19,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:19,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:29:19,618 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) [2023-09-01 14:29:19,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:29:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:19,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:29:19,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:29:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:29:19,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:29:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:29:19,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919643035] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:29:19,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:29:19,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 9 [2023-09-01 14:29:19,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403983727] [2023-09-01 14:29:19,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:29:19,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:29:19,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:29:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:29:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-09-01 14:29:19,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 228 [2023-09-01 14:29:19,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:19,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:29:19,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 228 [2023-09-01 14:29:19,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:29:20,082 INFO L130 PetriNetUnfolder]: 523/722 cut-off events. [2023-09-01 14:29:20,082 INFO L131 PetriNetUnfolder]: For 284/284 co-relation queries the response was YES. [2023-09-01 14:29:20,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1949 conditions, 722 events. 523/722 cut-off events. For 284/284 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2001 event pairs, 67 based on Foata normal form. 36/758 useless extension candidates. Maximal degree in co-relation 664. Up to 355 conditions per place. [2023-09-01 14:29:20,086 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 56 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-09-01 14:29:20,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 62 transitions, 315 flow [2023-09-01 14:29:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:29:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:29:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 458 transitions. [2023-09-01 14:29:20,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021929824561403 [2023-09-01 14:29:20,087 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 458 transitions. [2023-09-01 14:29:20,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 458 transitions. [2023-09-01 14:29:20,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:29:20,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 458 transitions. [2023-09-01 14:29:20,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:20,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:20,091 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:20,091 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 91 flow. Second operand 4 states and 458 transitions. [2023-09-01 14:29:20,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 62 transitions, 315 flow [2023-09-01 14:29:20,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 62 transitions, 305 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 14:29:20,093 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 120 flow [2023-09-01 14:29:20,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-09-01 14:29:20,093 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-09-01 14:29:20,094 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 120 flow [2023-09-01 14:29:20,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:20,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:29:20,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:29:20,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 14:29:20,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:20,300 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)] === [2023-09-01 14:29:20,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:29:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1640393862, now seen corresponding path program 2 times [2023-09-01 14:29:20,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:29:20,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372606005] [2023-09-01 14:29:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:20,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:29:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:29:20,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:29:20,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372606005] [2023-09-01 14:29:20,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372606005] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:29:20,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278356075] [2023-09-01 14:29:20,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:29:20,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:20,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:29:20,465 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) [2023-09-01 14:29:20,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:29:20,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:29:20,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:29:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:29:20,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:29:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:29:20,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:29:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:29:20,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278356075] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:29:20,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:29:20,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2023-09-01 14:29:20,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617311759] [2023-09-01 14:29:20,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:29:20,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:29:20,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:29:20,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:29:20,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:29:20,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 228 [2023-09-01 14:29:20,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:20,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:29:20,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 228 [2023-09-01 14:29:20,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:29:20,821 INFO L130 PetriNetUnfolder]: 683/948 cut-off events. [2023-09-01 14:29:20,822 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2023-09-01 14:29:20,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2839 conditions, 948 events. 683/948 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2865 event pairs, 99 based on Foata normal form. 24/972 useless extension candidates. Maximal degree in co-relation 1006. Up to 589 conditions per place. [2023-09-01 14:29:20,826 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 55 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-09-01 14:29:20,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 61 transitions, 337 flow [2023-09-01 14:29:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:29:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:29:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2023-09-01 14:29:20,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49780701754385964 [2023-09-01 14:29:20,828 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2023-09-01 14:29:20,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2023-09-01 14:29:20,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:29:20,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2023-09-01 14:29:20,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:20,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:20,831 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:20,831 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 120 flow. Second operand 4 states and 454 transitions. [2023-09-01 14:29:20,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 61 transitions, 337 flow [2023-09-01 14:29:20,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 61 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 14:29:20,835 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 159 flow [2023-09-01 14:29:20,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-09-01 14:29:20,836 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-09-01 14:29:20,837 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 159 flow [2023-09-01 14:29:20,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:20,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:29:20,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:29:20,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 14:29:21,042 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,SelfDestructingSolverStorable3 [2023-09-01 14:29:21,043 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)] === [2023-09-01 14:29:21,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:29:21,043 INFO L85 PathProgramCache]: Analyzing trace with hash -144285389, now seen corresponding path program 1 times [2023-09-01 14:29:21,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:29:21,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880773527] [2023-09-01 14:29:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:21,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:29:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:29:21,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:29:21,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880773527] [2023-09-01 14:29:21,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880773527] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:29:21,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129947919] [2023-09-01 14:29:21,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:21,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:21,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:29:21,211 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) [2023-09-01 14:29:21,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:29:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:21,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:29:21,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:29:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:29:21,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:29:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:29:21,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129947919] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:29:21,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:29:21,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 9 [2023-09-01 14:29:21,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556361664] [2023-09-01 14:29:21,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:29:21,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:29:21,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:29:21,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:29:21,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-09-01 14:29:21,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 228 [2023-09-01 14:29:21,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:21,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:29:21,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 228 [2023-09-01 14:29:21,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:29:21,621 INFO L130 PetriNetUnfolder]: 1401/1990 cut-off events. [2023-09-01 14:29:21,621 INFO L131 PetriNetUnfolder]: For 2927/2927 co-relation queries the response was YES. [2023-09-01 14:29:21,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6439 conditions, 1990 events. 1401/1990 cut-off events. For 2927/2927 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7418 event pairs, 239 based on Foata normal form. 82/2072 useless extension candidates. Maximal degree in co-relation 3337. Up to 875 conditions per place. [2023-09-01 14:29:21,629 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 71 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2023-09-01 14:29:21,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 78 transitions, 500 flow [2023-09-01 14:29:21,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:29:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:29:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2023-09-01 14:29:21,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043859649122807 [2023-09-01 14:29:21,631 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2023-09-01 14:29:21,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2023-09-01 14:29:21,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:29:21,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2023-09-01 14:29:21,632 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) [2023-09-01 14:29:21,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:21,634 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:21,634 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 159 flow. Second operand 4 states and 460 transitions. [2023-09-01 14:29:21,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 78 transitions, 500 flow [2023-09-01 14:29:21,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 78 transitions, 492 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-09-01 14:29:21,637 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 222 flow [2023-09-01 14:29:21,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-09-01 14:29:21,637 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2023-09-01 14:29:21,637 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 222 flow [2023-09-01 14:29:21,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:21,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:29:21,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:29:21,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 14:29:21,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:21,842 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)] === [2023-09-01 14:29:21,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:29:21,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1646860855, now seen corresponding path program 2 times [2023-09-01 14:29:21,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:29:21,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095135865] [2023-09-01 14:29:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:21,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:29:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:29:21,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:29:21,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095135865] [2023-09-01 14:29:21,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095135865] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:29:21,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:29:21,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:29:21,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606202155] [2023-09-01 14:29:21,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:29:21,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:29:21,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:29:21,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:29:21,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:29:21,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2023-09-01 14:29:21,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:21,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:29:21,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2023-09-01 14:29:21,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:29:22,178 INFO L130 PetriNetUnfolder]: 1509/2138 cut-off events. [2023-09-01 14:29:22,178 INFO L131 PetriNetUnfolder]: For 5068/5068 co-relation queries the response was YES. [2023-09-01 14:29:22,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7652 conditions, 2138 events. 1509/2138 cut-off events. For 5068/5068 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8000 event pairs, 525 based on Foata normal form. 28/2166 useless extension candidates. Maximal degree in co-relation 3621. Up to 1983 conditions per place. [2023-09-01 14:29:22,187 INFO L137 encePairwiseOnDemand]: 224/228 looper letters, 48 selfloop transitions, 5 changer transitions 12/65 dead transitions. [2023-09-01 14:29:22,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 476 flow [2023-09-01 14:29:22,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:29:22,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:29:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 441 transitions. [2023-09-01 14:29:22,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48355263157894735 [2023-09-01 14:29:22,189 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 441 transitions. [2023-09-01 14:29:22,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 441 transitions. [2023-09-01 14:29:22,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:29:22,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 441 transitions. [2023-09-01 14:29:22,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:22,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:22,191 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:22,191 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 222 flow. Second operand 4 states and 441 transitions. [2023-09-01 14:29:22,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 476 flow [2023-09-01 14:29:22,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 14:29:22,195 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 271 flow [2023-09-01 14:29:22,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-09-01 14:29:22,195 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 16 predicate places. [2023-09-01 14:29:22,195 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 271 flow [2023-09-01 14:29:22,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:22,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:29:22,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:29:22,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 14:29:22,196 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)] === [2023-09-01 14:29:22,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:29:22,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2073240921, now seen corresponding path program 3 times [2023-09-01 14:29:22,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:29:22,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247654344] [2023-09-01 14:29:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:22,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:29:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:29:22,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:29:22,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247654344] [2023-09-01 14:29:22,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247654344] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:29:22,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:29:22,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:29:22,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183250769] [2023-09-01 14:29:22,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:29:22,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:29:22,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:29:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:29:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:29:22,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2023-09-01 14:29:22,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:22,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:29:22,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2023-09-01 14:29:22,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:29:22,469 INFO L130 PetriNetUnfolder]: 1295/1808 cut-off events. [2023-09-01 14:29:22,469 INFO L131 PetriNetUnfolder]: For 5078/5078 co-relation queries the response was YES. [2023-09-01 14:29:22,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7044 conditions, 1808 events. 1295/1808 cut-off events. For 5078/5078 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6162 event pairs, 484 based on Foata normal form. 14/1822 useless extension candidates. Maximal degree in co-relation 6790. Up to 1683 conditions per place. [2023-09-01 14:29:22,478 INFO L137 encePairwiseOnDemand]: 224/228 looper letters, 49 selfloop transitions, 5 changer transitions 8/62 dead transitions. [2023-09-01 14:29:22,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 62 transitions, 495 flow [2023-09-01 14:29:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:29:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:29:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 437 transitions. [2023-09-01 14:29:22,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-09-01 14:29:22,480 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 437 transitions. [2023-09-01 14:29:22,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 437 transitions. [2023-09-01 14:29:22,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:29:22,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 437 transitions. [2023-09-01 14:29:22,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:22,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:22,482 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:22,483 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 271 flow. Second operand 4 states and 437 transitions. [2023-09-01 14:29:22,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 62 transitions, 495 flow [2023-09-01 14:29:22,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 484 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 14:29:22,486 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 289 flow [2023-09-01 14:29:22,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=289, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2023-09-01 14:29:22,487 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-09-01 14:29:22,487 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 289 flow [2023-09-01 14:29:22,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:22,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:29:22,487 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] [2023-09-01 14:29:22,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 14:29:22,488 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)] === [2023-09-01 14:29:22,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:29:22,488 INFO L85 PathProgramCache]: Analyzing trace with hash -469343912, now seen corresponding path program 1 times [2023-09-01 14:29:22,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:29:22,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734848621] [2023-09-01 14:29:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:22,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:29:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:29:22,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:29:22,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734848621] [2023-09-01 14:29:22,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734848621] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:29:22,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584084202] [2023-09-01 14:29:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:22,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:22,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:29:22,601 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) [2023-09-01 14:29:22,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:29:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:22,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:29:22,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:29:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:29:22,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:29:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:29:22,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584084202] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:29:22,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:29:22,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2023-09-01 14:29:22,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452132164] [2023-09-01 14:29:22,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:29:22,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:29:22,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:29:22,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:29:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:29:22,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 228 [2023-09-01 14:29:22,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 289 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:22,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:29:22,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 228 [2023-09-01 14:29:22,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:29:23,052 INFO L130 PetriNetUnfolder]: 2542/3579 cut-off events. [2023-09-01 14:29:23,052 INFO L131 PetriNetUnfolder]: For 10236/10236 co-relation queries the response was YES. [2023-09-01 14:29:23,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14195 conditions, 3579 events. 2542/3579 cut-off events. For 10236/10236 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15162 event pairs, 368 based on Foata normal form. 168/3747 useless extension candidates. Maximal degree in co-relation 7263. Up to 1913 conditions per place. [2023-09-01 14:29:23,077 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 80 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2023-09-01 14:29:23,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 91 transitions, 733 flow [2023-09-01 14:29:23,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:29:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:29:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 458 transitions. [2023-09-01 14:29:23,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021929824561403 [2023-09-01 14:29:23,079 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 458 transitions. [2023-09-01 14:29:23,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 458 transitions. [2023-09-01 14:29:23,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:29:23,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 458 transitions. [2023-09-01 14:29:23,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:23,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:23,081 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:23,081 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 289 flow. Second operand 4 states and 458 transitions. [2023-09-01 14:29:23,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 91 transitions, 733 flow [2023-09-01 14:29:23,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 91 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:29:23,087 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 384 flow [2023-09-01 14:29:23,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=384, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-09-01 14:29:23,089 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-09-01 14:29:23,090 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 384 flow [2023-09-01 14:29:23,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:23,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:29:23,090 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] [2023-09-01 14:29:23,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:29:23,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:23,295 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)] === [2023-09-01 14:29:23,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:29:23,295 INFO L85 PathProgramCache]: Analyzing trace with hash 326712243, now seen corresponding path program 1 times [2023-09-01 14:29:23,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:29:23,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975910073] [2023-09-01 14:29:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:23,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:29:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:29:23,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:29:23,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975910073] [2023-09-01 14:29:23,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975910073] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:29:23,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877047089] [2023-09-01 14:29:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:23,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:23,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:29:23,405 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) [2023-09-01 14:29:23,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:29:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:23,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 14:29:23,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:29:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:29:23,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:29:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:29:23,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877047089] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:29:23,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:29:23,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-09-01 14:29:23,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570523881] [2023-09-01 14:29:23,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:29:23,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:29:23,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:29:23,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:29:23,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:29:23,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 228 [2023-09-01 14:29:23,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 384 flow. Second operand has 5 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:23,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:29:23,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 228 [2023-09-01 14:29:23,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:29:24,414 INFO L130 PetriNetUnfolder]: 7768/11212 cut-off events. [2023-09-01 14:29:24,415 INFO L131 PetriNetUnfolder]: For 43561/43561 co-relation queries the response was YES. [2023-09-01 14:29:24,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47530 conditions, 11212 events. 7768/11212 cut-off events. For 43561/43561 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 60764 event pairs, 1722 based on Foata normal form. 857/12069 useless extension candidates. Maximal degree in co-relation 25968. Up to 4773 conditions per place. [2023-09-01 14:29:24,469 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 119 selfloop transitions, 45 changer transitions 3/167 dead transitions. [2023-09-01 14:29:24,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 167 transitions, 1571 flow [2023-09-01 14:29:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:29:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:29:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 634 transitions. [2023-09-01 14:29:24,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561403508771929 [2023-09-01 14:29:24,471 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 634 transitions. [2023-09-01 14:29:24,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 634 transitions. [2023-09-01 14:29:24,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:29:24,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 634 transitions. [2023-09-01 14:29:24,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:24,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:24,474 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:24,474 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 384 flow. Second operand 5 states and 634 transitions. [2023-09-01 14:29:24,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 167 transitions, 1571 flow [2023-09-01 14:29:24,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 167 transitions, 1565 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-09-01 14:29:24,490 INFO L231 Difference]: Finished difference. Result has 59 places, 90 transitions, 910 flow [2023-09-01 14:29:24,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=910, PETRI_PLACES=59, PETRI_TRANSITIONS=90} [2023-09-01 14:29:24,491 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 25 predicate places. [2023-09-01 14:29:24,491 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 90 transitions, 910 flow [2023-09-01 14:29:24,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:24,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:29:24,491 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] [2023-09-01 14:29:24,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 14:29:24,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:24,696 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)] === [2023-09-01 14:29:24,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:29:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1317515386, now seen corresponding path program 2 times [2023-09-01 14:29:24,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:29:24,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051633925] [2023-09-01 14:29:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:24,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:29:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:29:24,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:29:24,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051633925] [2023-09-01 14:29:24,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051633925] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:29:24,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170022336] [2023-09-01 14:29:24,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:29:24,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:24,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:29:24,858 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) [2023-09-01 14:29:24,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:29:24,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:29:24,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:29:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 14:29:24,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:29:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:29:25,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:29:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:29:25,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170022336] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:29:25,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:29:25,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-09-01 14:29:25,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15502692] [2023-09-01 14:29:25,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:29:25,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 14:29:25,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:29:25,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 14:29:25,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-09-01 14:29:25,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-09-01 14:29:25,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 90 transitions, 910 flow. Second operand has 15 states, 15 states have (on average 96.33333333333333) internal successors, (1445), 15 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:25,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:29:25,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-09-01 14:29:25,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:29:28,551 INFO L130 PetriNetUnfolder]: 24571/35096 cut-off events. [2023-09-01 14:29:28,551 INFO L131 PetriNetUnfolder]: For 166298/166298 co-relation queries the response was YES. [2023-09-01 14:29:28,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167227 conditions, 35096 events. 24571/35096 cut-off events. For 166298/166298 co-relation queries the response was YES. Maximal size of possible extension queue 1428. Compared 221645 event pairs, 2602 based on Foata normal form. 5500/40596 useless extension candidates. Maximal degree in co-relation 82340. Up to 16813 conditions per place. [2023-09-01 14:29:28,785 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 746 selfloop transitions, 316 changer transitions 0/1062 dead transitions. [2023-09-01 14:29:28,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 1062 transitions, 10861 flow [2023-09-01 14:29:28,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 14:29:28,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 14:29:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3693 transitions. [2023-09-01 14:29:28,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46278195488721807 [2023-09-01 14:29:28,794 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3693 transitions. [2023-09-01 14:29:28,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3693 transitions. [2023-09-01 14:29:28,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:29:28,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3693 transitions. [2023-09-01 14:29:28,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 105.51428571428572) internal successors, (3693), 35 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:28,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 228.0) internal successors, (8208), 36 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:28,813 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 228.0) internal successors, (8208), 36 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:28,814 INFO L175 Difference]: Start difference. First operand has 59 places, 90 transitions, 910 flow. Second operand 35 states and 3693 transitions. [2023-09-01 14:29:28,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 1062 transitions, 10861 flow [2023-09-01 14:29:29,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 1062 transitions, 9625 flow, removed 618 selfloop flow, removed 0 redundant places. [2023-09-01 14:29:29,136 INFO L231 Difference]: Finished difference. Result has 122 places, 389 transitions, 4934 flow [2023-09-01 14:29:29,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4934, PETRI_PLACES=122, PETRI_TRANSITIONS=389} [2023-09-01 14:29:29,136 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 88 predicate places. [2023-09-01 14:29:29,139 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 389 transitions, 4934 flow [2023-09-01 14:29:29,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 96.33333333333333) internal successors, (1445), 15 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:29,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:29:29,140 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] [2023-09-01 14:29:29,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 14:29:29,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:29,345 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)] === [2023-09-01 14:29:29,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:29:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1179486957, now seen corresponding path program 3 times [2023-09-01 14:29:29,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:29:29,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076210762] [2023-09-01 14:29:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:29,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:29:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:29:29,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:29:29,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076210762] [2023-09-01 14:29:29,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076210762] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:29:29,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119968386] [2023-09-01 14:29:29,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:29:29,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:29,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:29:29,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:29:29,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:29:29,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:29:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:29:29,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 14:29:29,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:29:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:29:29,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:29:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:29:29,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119968386] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:29:29,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:29:29,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-09-01 14:29:29,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430400489] [2023-09-01 14:29:29,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:29:29,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 14:29:29,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:29:29,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 14:29:29,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-09-01 14:29:29,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 228 [2023-09-01 14:29:29,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 389 transitions, 4934 flow. Second operand has 13 states, 13 states have (on average 99.84615384615384) internal successors, (1298), 13 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:29,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:29:29,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 228 [2023-09-01 14:29:29,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:29:35,950 INFO L130 PetriNetUnfolder]: 32911/46963 cut-off events. [2023-09-01 14:29:35,950 INFO L131 PetriNetUnfolder]: For 1425468/1425468 co-relation queries the response was YES. [2023-09-01 14:29:36,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371594 conditions, 46963 events. 32911/46963 cut-off events. For 1425468/1425468 co-relation queries the response was YES. Maximal size of possible extension queue 1950. Compared 305920 event pairs, 6160 based on Foata normal form. 1192/48155 useless extension candidates. Maximal degree in co-relation 306181. Up to 18872 conditions per place. [2023-09-01 14:29:36,463 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 659 selfloop transitions, 142 changer transitions 45/846 dead transitions. [2023-09-01 14:29:36,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 846 transitions, 12293 flow [2023-09-01 14:29:36,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 14:29:36,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 14:29:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1717 transitions. [2023-09-01 14:29:36,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706688596491228 [2023-09-01 14:29:36,466 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1717 transitions. [2023-09-01 14:29:36,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1717 transitions. [2023-09-01 14:29:36,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:29:36,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1717 transitions. [2023-09-01 14:29:36,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 107.3125) internal successors, (1717), 16 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:36,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 228.0) internal successors, (3876), 17 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:36,474 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 228.0) internal successors, (3876), 17 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:36,474 INFO L175 Difference]: Start difference. First operand has 122 places, 389 transitions, 4934 flow. Second operand 16 states and 1717 transitions. [2023-09-01 14:29:36,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 846 transitions, 12293 flow [2023-09-01 14:29:40,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 846 transitions, 11201 flow, removed 487 selfloop flow, removed 3 redundant places. [2023-09-01 14:29:40,071 INFO L231 Difference]: Finished difference. Result has 140 places, 495 transitions, 6778 flow [2023-09-01 14:29:40,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=4199, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6778, PETRI_PLACES=140, PETRI_TRANSITIONS=495} [2023-09-01 14:29:40,072 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 106 predicate places. [2023-09-01 14:29:40,072 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 495 transitions, 6778 flow [2023-09-01 14:29:40,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 99.84615384615384) internal successors, (1298), 13 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:40,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:29:40,072 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] [2023-09-01 14:29:40,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 14:29:40,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:40,273 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)] === [2023-09-01 14:29:40,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:29:40,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2010129489, now seen corresponding path program 4 times [2023-09-01 14:29:40,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:29:40,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532466794] [2023-09-01 14:29:40,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:29:40,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:29:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:29:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:29:40,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:29:40,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532466794] [2023-09-01 14:29:40,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532466794] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:29:40,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291083112] [2023-09-01 14:29:40,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:29:40,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:29:40,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:29:40,589 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:29:40,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:29:40,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:29:40,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:29:40,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 14:29:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:29:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:29:40,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:29:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:29:40,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291083112] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:29:40,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:29:40,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-09-01 14:29:40,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424011939] [2023-09-01 14:29:40,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:29:40,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 14:29:40,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:29:40,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 14:29:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-09-01 14:29:41,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-09-01 14:29:41,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 495 transitions, 6778 flow. Second operand has 18 states, 18 states have (on average 95.38888888888889) internal successors, (1717), 18 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:41,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:29:41,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-09-01 14:29:41,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:29:52,661 INFO L130 PetriNetUnfolder]: 49792/69719 cut-off events. [2023-09-01 14:29:52,661 INFO L131 PetriNetUnfolder]: For 2415001/2415001 co-relation queries the response was YES. [2023-09-01 14:29:53,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599805 conditions, 69719 events. 49792/69719 cut-off events. For 2415001/2415001 co-relation queries the response was YES. Maximal size of possible extension queue 2716. Compared 458008 event pairs, 3954 based on Foata normal form. 1354/71073 useless extension candidates. Maximal degree in co-relation 544874. Up to 23207 conditions per place. [2023-09-01 14:29:53,500 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 1059 selfloop transitions, 579 changer transitions 44/1682 dead transitions. [2023-09-01 14:29:53,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 1682 transitions, 27131 flow [2023-09-01 14:29:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 14:29:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 14:29:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3336 transitions. [2023-09-01 14:29:53,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45723684210526316 [2023-09-01 14:29:53,519 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3336 transitions. [2023-09-01 14:29:53,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3336 transitions. [2023-09-01 14:29:53,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:29:53,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3336 transitions. [2023-09-01 14:29:53,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 104.25) internal successors, (3336), 32 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:53,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 228.0) internal successors, (7524), 33 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:53,532 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 228.0) internal successors, (7524), 33 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:29:53,532 INFO L175 Difference]: Start difference. First operand has 140 places, 495 transitions, 6778 flow. Second operand 32 states and 3336 transitions. [2023-09-01 14:29:53,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 1682 transitions, 27131 flow [2023-09-01 14:30:01,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 1682 transitions, 25141 flow, removed 891 selfloop flow, removed 6 redundant places. [2023-09-01 14:30:01,170 INFO L231 Difference]: Finished difference. Result has 184 places, 954 transitions, 16579 flow [2023-09-01 14:30:01,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=6022, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=16579, PETRI_PLACES=184, PETRI_TRANSITIONS=954} [2023-09-01 14:30:01,171 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 150 predicate places. [2023-09-01 14:30:01,171 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 954 transitions, 16579 flow [2023-09-01 14:30:01,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 95.38888888888889) internal successors, (1717), 18 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:01,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:01,172 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] [2023-09-01 14:30:01,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:01,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 14:30:01,376 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)] === [2023-09-01 14:30:01,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:01,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1258277956, now seen corresponding path program 5 times [2023-09-01 14:30:01,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:01,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243587539] [2023-09-01 14:30:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:01,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:30:01,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:01,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243587539] [2023-09-01 14:30:01,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243587539] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:01,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853693217] [2023-09-01 14:30:01,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:30:01,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:01,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:01,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:30:01,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:30:01,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:30:01,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:01,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 14:30:01,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:30:01,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:30:01,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853693217] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:01,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:01,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-09-01 14:30:01,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966119152] [2023-09-01 14:30:01,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:01,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 14:30:01,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 14:30:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-09-01 14:30:01,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-09-01 14:30:01,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 954 transitions, 16579 flow. Second operand has 16 states, 16 states have (on average 96.0625) internal successors, (1537), 16 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:01,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:01,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-09-01 14:30:01,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:24,115 INFO L130 PetriNetUnfolder]: 71081/98866 cut-off events. [2023-09-01 14:30:24,116 INFO L131 PetriNetUnfolder]: For 4113218/4113218 co-relation queries the response was YES. [2023-09-01 14:30:25,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923757 conditions, 98866 events. 71081/98866 cut-off events. For 4113218/4113218 co-relation queries the response was YES. Maximal size of possible extension queue 3948. Compared 666810 event pairs, 5286 based on Foata normal form. 5814/104680 useless extension candidates. Maximal degree in co-relation 902438. Up to 37754 conditions per place. [2023-09-01 14:30:26,066 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 1550 selfloop transitions, 941 changer transitions 69/2560 dead transitions. [2023-09-01 14:30:26,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 2560 transitions, 45616 flow [2023-09-01 14:30:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 14:30:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 14:30:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3588 transitions. [2023-09-01 14:30:26,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496240601503759 [2023-09-01 14:30:26,070 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3588 transitions. [2023-09-01 14:30:26,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3588 transitions. [2023-09-01 14:30:26,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:26,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3588 transitions. [2023-09-01 14:30:26,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 102.51428571428572) internal successors, (3588), 35 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:26,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 228.0) internal successors, (8208), 36 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:26,090 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 228.0) internal successors, (8208), 36 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:26,090 INFO L175 Difference]: Start difference. First operand has 184 places, 954 transitions, 16579 flow. Second operand 35 states and 3588 transitions. [2023-09-01 14:30:26,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 2560 transitions, 45616 flow [2023-09-01 14:31:05,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 2560 transitions, 42900 flow, removed 1308 selfloop flow, removed 3 redundant places. [2023-09-01 14:31:05,274 INFO L231 Difference]: Finished difference. Result has 237 places, 1524 transitions, 28336 flow [2023-09-01 14:31:05,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=14875, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=28336, PETRI_PLACES=237, PETRI_TRANSITIONS=1524} [2023-09-01 14:31:05,275 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 203 predicate places. [2023-09-01 14:31:05,275 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 1524 transitions, 28336 flow [2023-09-01 14:31:05,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 96.0625) internal successors, (1537), 16 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:05,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:31:05,276 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] [2023-09-01 14:31:05,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-09-01 14:31:05,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 14:31:05,481 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)] === [2023-09-01 14:31:05,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:31:05,481 INFO L85 PathProgramCache]: Analyzing trace with hash 32477611, now seen corresponding path program 6 times [2023-09-01 14:31:05,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:31:05,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346666463] [2023-09-01 14:31:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:31:05,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:31:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:31:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:31:05,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:31:05,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346666463] [2023-09-01 14:31:05,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346666463] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:31:05,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909968690] [2023-09-01 14:31:05,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:31:05,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:31:05,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:31:05,599 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:31:05,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 14:31:05,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:31:05,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:31:05,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 14:31:05,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:31:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:31:05,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:31:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:31:05,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909968690] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:31:05,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:31:05,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-09-01 14:31:05,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996858335] [2023-09-01 14:31:05,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:31:05,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 14:31:05,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:31:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 14:31:05,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-09-01 14:31:05,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 228 [2023-09-01 14:31:05,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 1524 transitions, 28336 flow. Second operand has 15 states, 15 states have (on average 98.6) internal successors, (1479), 15 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:05,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:31:05,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 228 [2023-09-01 14:31:05,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:31:40,422 INFO L130 PetriNetUnfolder]: 79095/110427 cut-off events. [2023-09-01 14:31:40,423 INFO L131 PetriNetUnfolder]: For 6087808/6087808 co-relation queries the response was YES. [2023-09-01 14:31:42,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194751 conditions, 110427 events. 79095/110427 cut-off events. For 6087808/6087808 co-relation queries the response was YES. Maximal size of possible extension queue 4457. Compared 759956 event pairs, 4816 based on Foata normal form. 3678/114105 useless extension candidates. Maximal degree in co-relation 1192728. Up to 37627 conditions per place. [2023-09-01 14:31:43,055 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 1756 selfloop transitions, 924 changer transitions 69/2749 dead transitions. [2023-09-01 14:31:43,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 2749 transitions, 55133 flow [2023-09-01 14:31:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 14:31:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 14:31:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4679 transitions. [2023-09-01 14:31:43,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560428849902534 [2023-09-01 14:31:43,062 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4679 transitions. [2023-09-01 14:31:43,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4679 transitions. [2023-09-01 14:31:43,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:31:43,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4679 transitions. [2023-09-01 14:31:43,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 103.97777777777777) internal successors, (4679), 45 states have internal predecessors, (4679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:43,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 228.0) internal successors, (10488), 46 states have internal predecessors, (10488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:43,076 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 228.0) internal successors, (10488), 46 states have internal predecessors, (10488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:43,076 INFO L175 Difference]: Start difference. First operand has 237 places, 1524 transitions, 28336 flow. Second operand 45 states and 4679 transitions. [2023-09-01 14:31:43,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 2749 transitions, 55133 flow [2023-09-01 14:34:29,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 2749 transitions, 50643 flow, removed 1594 selfloop flow, removed 10 redundant places. [2023-09-01 14:34:29,353 INFO L231 Difference]: Finished difference. Result has 285 places, 1800 transitions, 33151 flow [2023-09-01 14:34:29,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=24319, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=846, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=33151, PETRI_PLACES=285, PETRI_TRANSITIONS=1800} [2023-09-01 14:34:29,354 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 251 predicate places. [2023-09-01 14:34:29,354 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1800 transitions, 33151 flow [2023-09-01 14:34:29,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 98.6) internal successors, (1479), 15 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:29,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:34:29,354 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] [2023-09-01 14:34:29,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 14:34:29,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 14:34:29,557 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)] === [2023-09-01 14:34:29,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:34:29,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1518250674, now seen corresponding path program 7 times [2023-09-01 14:34:29,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:34:29,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982630739] [2023-09-01 14:34:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:34:29,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:34:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:34:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:34:29,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:34:29,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982630739] [2023-09-01 14:34:29,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982630739] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:34:29,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077379950] [2023-09-01 14:34:29,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:34:29,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:29,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:34:29,705 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:34:29,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 14:34:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:34:29,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 14:34:29,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:34:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:34:29,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:34:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:34:30,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077379950] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:34:30,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:34:30,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-09-01 14:34:30,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577634754] [2023-09-01 14:34:30,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:34:30,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 14:34:30,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:34:30,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 14:34:30,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-09-01 14:34:30,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-09-01 14:34:30,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1800 transitions, 33151 flow. Second operand has 15 states, 15 states have (on average 95.93333333333334) internal successors, (1439), 15 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:30,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:34:30,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-09-01 14:34:30,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:20,959 INFO L130 PetriNetUnfolder]: 95335/133066 cut-off events. [2023-09-01 14:35:20,960 INFO L131 PetriNetUnfolder]: For 9623872/9623872 co-relation queries the response was YES. [2023-09-01 14:35:23,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1609635 conditions, 133066 events. 95335/133066 cut-off events. For 9623872/9623872 co-relation queries the response was YES. Maximal size of possible extension queue 5500. Compared 937328 event pairs, 10962 based on Foata normal form. 2966/136032 useless extension candidates. Maximal degree in co-relation 1596343. Up to 46129 conditions per place. [2023-09-01 14:35:24,506 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 2951 selfloop transitions, 1229 changer transitions 161/4341 dead transitions. [2023-09-01 14:35:24,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 4341 transitions, 98097 flow [2023-09-01 14:35:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 14:35:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 14:35:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4042 transitions. [2023-09-01 14:35:24,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454565901934323 [2023-09-01 14:35:24,510 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4042 transitions. [2023-09-01 14:35:24,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4042 transitions. [2023-09-01 14:35:24,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:35:24,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4042 transitions. [2023-09-01 14:35:24,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 103.64102564102564) internal successors, (4042), 39 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:24,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 228.0) internal successors, (9120), 40 states have internal predecessors, (9120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:24,545 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 228.0) internal successors, (9120), 40 states have internal predecessors, (9120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:24,545 INFO L175 Difference]: Start difference. First operand has 285 places, 1800 transitions, 33151 flow. Second operand 39 states and 4042 transitions. [2023-09-01 14:35:24,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 4341 transitions, 98097 flow [2023-09-01 14:41:24,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 4341 transitions, 93912 flow, removed 1600 selfloop flow, removed 17 redundant places. [2023-09-01 14:41:24,537 INFO L231 Difference]: Finished difference. Result has 321 places, 2312 transitions, 46088 flow [2023-09-01 14:41:24,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=31097, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=755, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=894, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=46088, PETRI_PLACES=321, PETRI_TRANSITIONS=2312} [2023-09-01 14:41:24,538 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 287 predicate places. [2023-09-01 14:41:24,538 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 2312 transitions, 46088 flow [2023-09-01 14:41:24,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 95.93333333333334) internal successors, (1439), 15 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:41:24,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:41:24,539 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] [2023-09-01 14:41:24,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 14:41:24,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:41:24,746 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)] === [2023-09-01 14:41:24,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:41:24,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1979918782, now seen corresponding path program 8 times [2023-09-01 14:41:24,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:41:24,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543604876] [2023-09-01 14:41:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:41:24,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:41:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:41:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:41:24,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:41:24,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543604876] [2023-09-01 14:41:24,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543604876] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:41:24,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603240399] [2023-09-01 14:41:24,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:41:24,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:41:24,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:41:24,851 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:41:24,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 14:41:24,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:41:24,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:41:24,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 14:41:24,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:41:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:41:25,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:41:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:41:25,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603240399] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:41:25,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:41:25,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2023-09-01 14:41:25,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808628035] [2023-09-01 14:41:25,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:41:25,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 14:41:25,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:41:25,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 14:41:25,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-09-01 14:41:25,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 228 [2023-09-01 14:41:25,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 2312 transitions, 46088 flow. Second operand has 14 states, 14 states have (on average 99.07142857142857) internal successors, (1387), 14 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:41:25,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:41:25,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 228 [2023-09-01 14:41:25,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:42:34,313 INFO L130 PetriNetUnfolder]: 115546/161227 cut-off events. [2023-09-01 14:42:34,313 INFO L131 PetriNetUnfolder]: For 11646482/11646482 co-relation queries the response was YES. [2023-09-01 14:42:38,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2030627 conditions, 161227 events. 115546/161227 cut-off events. For 11646482/11646482 co-relation queries the response was YES. Maximal size of possible extension queue 6625. Compared 1161935 event pairs, 12674 based on Foata normal form. 890/162117 useless extension candidates. Maximal degree in co-relation 2004844. Up to 69078 conditions per place. [2023-09-01 14:42:39,816 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 3489 selfloop transitions, 1115 changer transitions 167/4771 dead transitions. [2023-09-01 14:42:39,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 4771 transitions, 111739 flow [2023-09-01 14:42:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 14:42:39,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 14:42:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1722 transitions. [2023-09-01 14:42:39,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720394736842105 [2023-09-01 14:42:39,818 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1722 transitions. [2023-09-01 14:42:39,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1722 transitions. [2023-09-01 14:42:39,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:42:39,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1722 transitions. [2023-09-01 14:42:39,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 107.625) internal successors, (1722), 16 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:39,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 228.0) internal successors, (3876), 17 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:39,823 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 228.0) internal successors, (3876), 17 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:39,823 INFO L175 Difference]: Start difference. First operand has 321 places, 2312 transitions, 46088 flow. Second operand 16 states and 1722 transitions. [2023-09-01 14:42:39,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 4771 transitions, 111739 flow Killed by 15