./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.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 b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 19:39:19,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:39:19,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:39:19,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:39:19,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:39:19,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:39:19,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:39:19,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:39:19,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:39:19,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:39:19,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:39:19,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:39:19,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:39:19,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:39:19,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:39:19,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:39:19,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:39:19,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:39:19,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:39:19,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:39:19,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:39:19,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:39:19,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:39:19,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:39:19,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:39:19,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:39:19,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:39:19,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:39:19,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:39:19,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:39:19,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:39:19,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:39:19,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:39:19,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:39:19,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:39:19,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:39:19,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:39:19,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:39:19,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:39:19,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:39:19,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:39:19,820 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:39:19,858 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:39:19,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:39:19,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:39:19,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:39:19,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:39:19,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:39:19,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:39:19,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:39:19,861 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:39:19,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:39:19,862 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:39:19,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:39:19,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:39:19,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:39:19,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:39:19,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:39:19,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:39:19,864 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:39:19,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:39:19,864 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:39:19,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:39:19,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:39:19,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:39:19,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:39:19,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:39:19,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:39:19,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:39:19,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:39:19,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:39:19,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:39:19,866 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:39:19,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:39:19,867 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:39:19,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:39:19,867 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:39:19,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:39:20,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:39:20,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:39:20,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:39:20,177 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:39:20,177 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:39:20,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2023-08-30 19:39:21,378 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:39:21,597 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:39:21,597 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2023-08-30 19:39:21,603 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/040a88bb6/7ed6aefa8d424ea797e5a0bc6306ee89/FLAGa7b4234ec [2023-08-30 19:39:21,615 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/040a88bb6/7ed6aefa8d424ea797e5a0bc6306ee89 [2023-08-30 19:39:21,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:39:21,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:39:21,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:39:21,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:39:21,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:39:21,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:21,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@316fa224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21, skipping insertion in model container [2023-08-30 19:39:21,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:21,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:39:21,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:39:21,817 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2023-08-30 19:39:21,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:39:21,839 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:39:21,880 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2023-08-30 19:39:21,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:39:21,890 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:39:21,896 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:39:21,901 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:39:21,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21 WrapperNode [2023-08-30 19:39:21,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:39:21,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:39:21,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:39:21,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:39:21,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:21,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:21,946 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-08-30 19:39:21,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:39:21,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:39:21,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:39:21,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:39:21,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:21,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:21,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:21,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:21,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:21,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:21,987 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:21,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:21,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:39:21,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:39:21,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:39:21,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:39:22,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21" (1/1) ... [2023-08-30 19:39:22,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:39:22,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:22,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 19:39:22,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 19:39:22,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:39:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:39:22,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:39:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:39:22,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:39:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:39:22,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:39:22,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:39:22,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:39:22,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:39:22,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 19:39:22,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 19:39:22,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:39:22,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:39:22,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:39:22,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:39:22,062 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 19:39:22,182 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:39:22,183 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:39:22,370 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:39:22,391 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:39:22,391 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 19:39:22,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:39:22 BoogieIcfgContainer [2023-08-30 19:39:22,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:39:22,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:39:22,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:39:22,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:39:22,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:39:21" (1/3) ... [2023-08-30 19:39:22,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5477fc92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:39:22, skipping insertion in model container [2023-08-30 19:39:22,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:21" (2/3) ... [2023-08-30 19:39:22,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5477fc92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:39:22, skipping insertion in model container [2023-08-30 19:39:22,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:39:22" (3/3) ... [2023-08-30 19:39:22,400 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2023-08-30 19:39:22,406 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:39:22,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:39:22,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:39:22,414 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:39:22,522 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 19:39:22,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 127 transitions, 278 flow [2023-08-30 19:39:22,626 INFO L130 PetriNetUnfolder]: 16/124 cut-off events. [2023-08-30 19:39:22,627 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:39:22,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 124 events. 16/124 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2023-08-30 19:39:22,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 127 transitions, 278 flow [2023-08-30 19:39:22,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 114 transitions, 246 flow [2023-08-30 19:39:22,640 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:39:22,647 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 114 transitions, 246 flow [2023-08-30 19:39:22,649 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 114 transitions, 246 flow [2023-08-30 19:39:22,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 246 flow [2023-08-30 19:39:22,706 INFO L130 PetriNetUnfolder]: 16/114 cut-off events. [2023-08-30 19:39:22,707 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:39:22,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 114 events. 16/114 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 144 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2023-08-30 19:39:22,712 INFO L119 LiptonReduction]: Number of co-enabled transitions 3240 [2023-08-30 19:39:26,254 INFO L134 LiptonReduction]: Checked pairs total: 3005 [2023-08-30 19:39:26,254 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-08-30 19:39:26,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:39:26,272 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;@31309d88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:39:26,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 19:39:26,278 INFO L130 PetriNetUnfolder]: 3/18 cut-off events. [2023-08-30 19:39:26,278 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:39:26,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:26,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:26,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:26,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:26,284 INFO L85 PathProgramCache]: Analyzing trace with hash -135806213, now seen corresponding path program 1 times [2023-08-30 19:39:26,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:26,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490945594] [2023-08-30 19:39:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:26,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:26,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:26,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490945594] [2023-08-30 19:39:26,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490945594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:26,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:26,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 19:39:26,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383096489] [2023-08-30 19:39:26,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:26,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:39:26,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:26,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:39:26,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:39:26,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 240 [2023-08-30 19:39:26,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:26,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:26,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 240 [2023-08-30 19:39:26,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:26,757 INFO L130 PetriNetUnfolder]: 111/168 cut-off events. [2023-08-30 19:39:26,758 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 19:39:26,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 168 events. 111/168 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 334 event pairs, 17 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 244. Up to 105 conditions per place. [2023-08-30 19:39:26,762 INFO L137 encePairwiseOnDemand]: 237/240 looper letters, 27 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-30 19:39:26,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 140 flow [2023-08-30 19:39:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:39:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:39:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-30 19:39:26,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 19:39:26,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-30 19:39:26,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-30 19:39:26,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:26,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-30 19:39:26,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:26,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:26,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:26,802 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 56 flow. Second operand 3 states and 360 transitions. [2023-08-30 19:39:26,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 140 flow [2023-08-30 19:39:26,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 29 transitions, 124 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 19:39:26,806 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 56 flow [2023-08-30 19:39:26,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2023-08-30 19:39:26,811 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-08-30 19:39:26,811 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 56 flow [2023-08-30 19:39:26,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:26,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:26,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:26,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:39:26,812 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:26,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:26,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1305020753, now seen corresponding path program 1 times [2023-08-30 19:39:26,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:26,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132429251] [2023-08-30 19:39:26,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:26,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:26,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:26,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132429251] [2023-08-30 19:39:26,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132429251] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:26,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:26,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 19:39:26,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990216702] [2023-08-30 19:39:26,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:26,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:39:26,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:39:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:39:26,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 240 [2023-08-30 19:39:26,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:26,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:26,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 240 [2023-08-30 19:39:26,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:27,012 INFO L130 PetriNetUnfolder]: 151/226 cut-off events. [2023-08-30 19:39:27,012 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-30 19:39:27,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 226 events. 151/226 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 549 event pairs, 11 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 188. Up to 185 conditions per place. [2023-08-30 19:39:27,014 INFO L137 encePairwiseOnDemand]: 237/240 looper letters, 29 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-30 19:39:27,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 149 flow [2023-08-30 19:39:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:39:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:39:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-30 19:39:27,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 19:39:27,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-30 19:39:27,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-30 19:39:27,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:27,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-30 19:39:27,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:27,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:27,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:27,021 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 56 flow. Second operand 3 states and 360 transitions. [2023-08-30 19:39:27,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 149 flow [2023-08-30 19:39:27,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:39:27,022 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 66 flow [2023-08-30 19:39:27,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-08-30 19:39:27,023 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-08-30 19:39:27,023 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 66 flow [2023-08-30 19:39:27,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:27,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:27,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:27,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:39:27,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:27,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:27,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1756026437, now seen corresponding path program 1 times [2023-08-30 19:39:27,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:27,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058579656] [2023-08-30 19:39:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:27,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:39:27,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:27,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058579656] [2023-08-30 19:39:27,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058579656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:27,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:27,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 19:39:27,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493820961] [2023-08-30 19:39:27,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:27,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:39:27,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:27,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:39:27,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:39:27,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 240 [2023-08-30 19:39:27,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:27,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:27,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 240 [2023-08-30 19:39:27,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:27,288 INFO L130 PetriNetUnfolder]: 220/325 cut-off events. [2023-08-30 19:39:27,288 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2023-08-30 19:39:27,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 325 events. 220/325 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 867 event pairs, 28 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 596. Up to 243 conditions per place. [2023-08-30 19:39:27,293 INFO L137 encePairwiseOnDemand]: 237/240 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-30 19:39:27,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 171 flow [2023-08-30 19:39:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:39:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:39:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-30 19:39:27,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 19:39:27,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-30 19:39:27,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-30 19:39:27,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:27,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-30 19:39:27,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:27,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:27,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:27,299 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 66 flow. Second operand 3 states and 360 transitions. [2023-08-30 19:39:27,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 171 flow [2023-08-30 19:39:27,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:39:27,301 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 76 flow [2023-08-30 19:39:27,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-08-30 19:39:27,301 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-08-30 19:39:27,302 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 76 flow [2023-08-30 19:39:27,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:27,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:27,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:27,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:39:27,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:27,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:27,303 INFO L85 PathProgramCache]: Analyzing trace with hash -170860382, now seen corresponding path program 1 times [2023-08-30 19:39:27,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:27,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599683265] [2023-08-30 19:39:27,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:27,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:39:27,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:27,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599683265] [2023-08-30 19:39:27,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599683265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:27,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565894697] [2023-08-30 19:39:27,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:27,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:27,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:27,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:39:27,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 19:39:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:27,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 19:39:27,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:28,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:28,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565894697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:28,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:28,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 4] total 10 [2023-08-30 19:39:28,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803245418] [2023-08-30 19:39:28,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:28,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:39:28,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:28,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:39:28,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:39:28,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 240 [2023-08-30 19:39:28,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 76 flow. Second operand has 11 states, 11 states have (on average 91.45454545454545) internal successors, (1006), 11 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:28,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:28,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 240 [2023-08-30 19:39:28,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:29,094 INFO L130 PetriNetUnfolder]: 397/582 cut-off events. [2023-08-30 19:39:29,095 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2023-08-30 19:39:29,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 582 events. 397/582 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1756 event pairs, 0 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 489. Up to 177 conditions per place. [2023-08-30 19:39:29,099 INFO L137 encePairwiseOnDemand]: 234/240 looper letters, 116 selfloop transitions, 29 changer transitions 0/145 dead transitions. [2023-08-30 19:39:29,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 145 transitions, 772 flow [2023-08-30 19:39:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:39:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:39:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1621 transitions. [2023-08-30 19:39:29,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3973039215686274 [2023-08-30 19:39:29,104 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1621 transitions. [2023-08-30 19:39:29,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1621 transitions. [2023-08-30 19:39:29,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:29,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1621 transitions. [2023-08-30 19:39:29,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 95.3529411764706) internal successors, (1621), 17 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:29,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 240.0) internal successors, (4320), 18 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:29,118 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 240.0) internal successors, (4320), 18 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:29,118 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 76 flow. Second operand 17 states and 1621 transitions. [2023-08-30 19:39:29,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 145 transitions, 772 flow [2023-08-30 19:39:29,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 145 transitions, 766 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:39:29,123 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 319 flow [2023-08-30 19:39:29,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=319, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2023-08-30 19:39:29,125 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 24 predicate places. [2023-08-30 19:39:29,126 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 319 flow [2023-08-30 19:39:29,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 91.45454545454545) internal successors, (1006), 11 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:29,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:29,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:29,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:29,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:29,333 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:29,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:29,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1244112525, now seen corresponding path program 2 times [2023-08-30 19:39:29,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:29,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239628742] [2023-08-30 19:39:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:29,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:39:29,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239628742] [2023-08-30 19:39:29,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239628742] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045546890] [2023-08-30 19:39:29,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:39:29,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:29,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:29,616 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:39:29,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 19:39:29,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:39:29,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:29,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 19:39:29,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:39:29,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 19:39:30,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045546890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:30,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:30,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 8 [2023-08-30 19:39:30,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702275098] [2023-08-30 19:39:30,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:30,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:39:30,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:39:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:39:30,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 240 [2023-08-30 19:39:30,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 319 flow. Second operand has 9 states, 9 states have (on average 101.88888888888889) internal successors, (917), 9 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:30,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:30,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 240 [2023-08-30 19:39:30,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:30,390 INFO L130 PetriNetUnfolder]: 503/734 cut-off events. [2023-08-30 19:39:30,390 INFO L131 PetriNetUnfolder]: For 1625/1625 co-relation queries the response was YES. [2023-08-30 19:39:30,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 734 events. 503/734 cut-off events. For 1625/1625 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2366 event pairs, 9 based on Foata normal form. 0/630 useless extension candidates. Maximal degree in co-relation 2162. Up to 223 conditions per place. [2023-08-30 19:39:30,397 INFO L137 encePairwiseOnDemand]: 235/240 looper letters, 148 selfloop transitions, 30 changer transitions 0/178 dead transitions. [2023-08-30 19:39:30,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 178 transitions, 1451 flow [2023-08-30 19:39:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:39:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:39:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1048 transitions. [2023-08-30 19:39:30,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43666666666666665 [2023-08-30 19:39:30,401 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1048 transitions. [2023-08-30 19:39:30,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1048 transitions. [2023-08-30 19:39:30,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:30,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1048 transitions. [2023-08-30 19:39:30,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 104.8) internal successors, (1048), 10 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:30,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 240.0) internal successors, (2640), 11 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:30,407 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 240.0) internal successors, (2640), 11 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:30,408 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 319 flow. Second operand 10 states and 1048 transitions. [2023-08-30 19:39:30,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 178 transitions, 1451 flow [2023-08-30 19:39:30,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 178 transitions, 1116 flow, removed 143 selfloop flow, removed 3 redundant places. [2023-08-30 19:39:30,418 INFO L231 Difference]: Finished difference. Result has 61 places, 75 transitions, 511 flow [2023-08-30 19:39:30,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=511, PETRI_PLACES=61, PETRI_TRANSITIONS=75} [2023-08-30 19:39:30,419 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2023-08-30 19:39:30,419 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 75 transitions, 511 flow [2023-08-30 19:39:30,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 101.88888888888889) internal successors, (917), 9 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:30,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:30,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:30,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:30,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:30,627 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:30,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1158182375, now seen corresponding path program 3 times [2023-08-30 19:39:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:30,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264932249] [2023-08-30 19:39:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:30,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:31,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:31,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264932249] [2023-08-30 19:39:31,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264932249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:31,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260665785] [2023-08-30 19:39:31,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:39:31,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:31,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:31,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:39:31,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 19:39:31,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:39:31,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:31,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 19:39:31,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:32,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:33,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260665785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:33,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:33,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 20 [2023-08-30 19:39:33,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778850848] [2023-08-30 19:39:33,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:33,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 19:39:33,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:33,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 19:39:33,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2023-08-30 19:39:33,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 240 [2023-08-30 19:39:33,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 75 transitions, 511 flow. Second operand has 22 states, 22 states have (on average 77.81818181818181) internal successors, (1712), 22 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:33,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:33,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 240 [2023-08-30 19:39:33,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:36,399 INFO L130 PetriNetUnfolder]: 2467/3512 cut-off events. [2023-08-30 19:39:36,400 INFO L131 PetriNetUnfolder]: For 12642/12642 co-relation queries the response was YES. [2023-08-30 19:39:36,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13933 conditions, 3512 events. 2467/3512 cut-off events. For 12642/12642 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15114 event pairs, 18 based on Foata normal form. 32/3210 useless extension candidates. Maximal degree in co-relation 12410. Up to 801 conditions per place. [2023-08-30 19:39:36,425 INFO L137 encePairwiseOnDemand]: 232/240 looper letters, 224 selfloop transitions, 410 changer transitions 24/658 dead transitions. [2023-08-30 19:39:36,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 658 transitions, 5364 flow [2023-08-30 19:39:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 19:39:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 19:39:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3041 transitions. [2023-08-30 19:39:36,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519675925925926 [2023-08-30 19:39:36,440 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3041 transitions. [2023-08-30 19:39:36,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3041 transitions. [2023-08-30 19:39:36,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:36,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3041 transitions. [2023-08-30 19:39:36,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 84.47222222222223) internal successors, (3041), 36 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:36,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 240.0) internal successors, (8880), 37 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:36,465 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 240.0) internal successors, (8880), 37 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:36,465 INFO L175 Difference]: Start difference. First operand has 61 places, 75 transitions, 511 flow. Second operand 36 states and 3041 transitions. [2023-08-30 19:39:36,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 658 transitions, 5364 flow [2023-08-30 19:39:36,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 658 transitions, 4976 flow, removed 183 selfloop flow, removed 1 redundant places. [2023-08-30 19:39:36,559 INFO L231 Difference]: Finished difference. Result has 107 places, 472 transitions, 4389 flow [2023-08-30 19:39:36,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4389, PETRI_PLACES=107, PETRI_TRANSITIONS=472} [2023-08-30 19:39:36,560 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 81 predicate places. [2023-08-30 19:39:36,560 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 472 transitions, 4389 flow [2023-08-30 19:39:36,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 77.81818181818181) internal successors, (1712), 22 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:36,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:36,561 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:36,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:36,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:36,767 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:36,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1565513747, now seen corresponding path program 4 times [2023-08-30 19:39:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:36,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910216947] [2023-08-30 19:39:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:36,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:37,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:37,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910216947] [2023-08-30 19:39:37,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910216947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:37,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781524890] [2023-08-30 19:39:37,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:39:37,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:37,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:37,901 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:39:37,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 19:39:37,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:39:37,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:37,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 19:39:37,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:38,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:39:39,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781524890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:39,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:39,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-08-30 19:39:39,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309689465] [2023-08-30 19:39:39,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:39,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 19:39:39,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:39,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 19:39:39,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2023-08-30 19:39:39,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 240 [2023-08-30 19:39:39,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 472 transitions, 4389 flow. Second operand has 24 states, 24 states have (on average 76.58333333333333) internal successors, (1838), 24 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:39,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:39,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 240 [2023-08-30 19:39:39,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:43,759 INFO L130 PetriNetUnfolder]: 6206/8902 cut-off events. [2023-08-30 19:39:43,759 INFO L131 PetriNetUnfolder]: For 40470/40470 co-relation queries the response was YES. [2023-08-30 19:39:43,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42649 conditions, 8902 events. 6206/8902 cut-off events. For 40470/40470 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 46320 event pairs, 26 based on Foata normal form. 54/8540 useless extension candidates. Maximal degree in co-relation 41148. Up to 2127 conditions per place. [2023-08-30 19:39:43,835 INFO L137 encePairwiseOnDemand]: 232/240 looper letters, 500 selfloop transitions, 1094 changer transitions 63/1657 dead transitions. [2023-08-30 19:39:43,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 1657 transitions, 17162 flow [2023-08-30 19:39:43,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 19:39:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 19:39:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3928 transitions. [2023-08-30 19:39:43,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34822695035460993 [2023-08-30 19:39:43,847 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3928 transitions. [2023-08-30 19:39:43,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3928 transitions. [2023-08-30 19:39:43,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:43,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3928 transitions. [2023-08-30 19:39:43,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 83.57446808510639) internal successors, (3928), 47 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:43,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 240.0) internal successors, (11520), 48 states have internal predecessors, (11520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:43,874 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 240.0) internal successors, (11520), 48 states have internal predecessors, (11520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:43,874 INFO L175 Difference]: Start difference. First operand has 107 places, 472 transitions, 4389 flow. Second operand 47 states and 3928 transitions. [2023-08-30 19:39:43,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 1657 transitions, 17162 flow [2023-08-30 19:39:44,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 1657 transitions, 15778 flow, removed 690 selfloop flow, removed 1 redundant places. [2023-08-30 19:39:44,600 INFO L231 Difference]: Finished difference. Result has 172 places, 1354 transitions, 15630 flow [2023-08-30 19:39:44,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=3817, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=15630, PETRI_PLACES=172, PETRI_TRANSITIONS=1354} [2023-08-30 19:39:44,601 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 146 predicate places. [2023-08-30 19:39:44,601 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 1354 transitions, 15630 flow [2023-08-30 19:39:44,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 76.58333333333333) internal successors, (1838), 24 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:44,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:44,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:44,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:44,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:44,809 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:44,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1531481615, now seen corresponding path program 5 times [2023-08-30 19:39:44,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:44,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357050633] [2023-08-30 19:39:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:44,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:46,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:46,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357050633] [2023-08-30 19:39:46,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357050633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:46,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79960398] [2023-08-30 19:39:46,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:39:46,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:46,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:46,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:39:46,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 19:39:46,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:39:46,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:46,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 19:39:46,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:46,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:47,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79960398] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:47,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:47,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 24 [2023-08-30 19:39:47,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197946091] [2023-08-30 19:39:47,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:47,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 19:39:47,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:47,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 19:39:47,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:39:48,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 240 [2023-08-30 19:39:48,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 1354 transitions, 15630 flow. Second operand has 26 states, 26 states have (on average 73.26923076923077) internal successors, (1905), 26 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:48,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:48,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 240 [2023-08-30 19:39:48,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:59,177 INFO L130 PetriNetUnfolder]: 17734/24832 cut-off events. [2023-08-30 19:39:59,177 INFO L131 PetriNetUnfolder]: For 146156/146156 co-relation queries the response was YES. [2023-08-30 19:39:59,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148649 conditions, 24832 events. 17734/24832 cut-off events. For 146156/146156 co-relation queries the response was YES. Maximal size of possible extension queue 1176. Compared 143648 event pairs, 28 based on Foata normal form. 57/24713 useless extension candidates. Maximal degree in co-relation 145971. Up to 7423 conditions per place. [2023-08-30 19:39:59,420 INFO L137 encePairwiseOnDemand]: 232/240 looper letters, 1184 selfloop transitions, 3774 changer transitions 43/5001 dead transitions. [2023-08-30 19:39:59,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 5001 transitions, 66210 flow [2023-08-30 19:39:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-08-30 19:39:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2023-08-30 19:39:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 7112 transitions. [2023-08-30 19:39:59,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33295880149812734 [2023-08-30 19:39:59,432 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 7112 transitions. [2023-08-30 19:39:59,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 7112 transitions. [2023-08-30 19:39:59,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:59,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 7112 transitions. [2023-08-30 19:39:59,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 79.91011235955057) internal successors, (7112), 89 states have internal predecessors, (7112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:59,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 240.0) internal successors, (21600), 90 states have internal predecessors, (21600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:59,485 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 240.0) internal successors, (21600), 90 states have internal predecessors, (21600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:59,485 INFO L175 Difference]: Start difference. First operand has 172 places, 1354 transitions, 15630 flow. Second operand 89 states and 7112 transitions. [2023-08-30 19:39:59,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 5001 transitions, 66210 flow [2023-08-30 19:40:09,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 5001 transitions, 63967 flow, removed 1112 selfloop flow, removed 2 redundant places. [2023-08-30 19:40:09,383 INFO L231 Difference]: Finished difference. Result has 293 places, 4504 transitions, 66708 flow [2023-08-30 19:40:09,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=15061, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=66708, PETRI_PLACES=293, PETRI_TRANSITIONS=4504} [2023-08-30 19:40:09,386 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 267 predicate places. [2023-08-30 19:40:09,386 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 4504 transitions, 66708 flow [2023-08-30 19:40:09,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 73.26923076923077) internal successors, (1905), 26 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:09,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:09,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:09,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 19:40:09,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:09,594 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:40:09,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:09,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1711291265, now seen corresponding path program 6 times [2023-08-30 19:40:09,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:09,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192270237] [2023-08-30 19:40:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:09,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:10,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:10,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192270237] [2023-08-30 19:40:10,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192270237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:10,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228211733] [2023-08-30 19:40:10,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:40:10,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:10,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:10,760 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:40:10,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 19:40:10,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:40:10,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:10,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 19:40:10,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:11,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:40:11,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228211733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:11,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:11,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-08-30 19:40:11,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873452210] [2023-08-30 19:40:11,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:11,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:40:11,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:40:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:40:12,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 240 [2023-08-30 19:40:12,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 4504 transitions, 66708 flow. Second operand has 25 states, 25 states have (on average 75.16) internal successors, (1879), 25 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:12,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:12,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 240 [2023-08-30 19:40:12,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:42,457 INFO L130 PetriNetUnfolder]: 30522/43870 cut-off events. [2023-08-30 19:40:42,457 INFO L131 PetriNetUnfolder]: For 400834/400834 co-relation queries the response was YES. [2023-08-30 19:40:43,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313607 conditions, 43870 events. 30522/43870 cut-off events. For 400834/400834 co-relation queries the response was YES. Maximal size of possible extension queue 2154. Compared 290556 event pairs, 82 based on Foata normal form. 68/43938 useless extension candidates. Maximal degree in co-relation 312221. Up to 13621 conditions per place. [2023-08-30 19:40:43,336 INFO L137 encePairwiseOnDemand]: 232/240 looper letters, 2759 selfloop transitions, 6119 changer transitions 90/8968 dead transitions. [2023-08-30 19:40:43,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 8968 transitions, 147419 flow [2023-08-30 19:40:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-08-30 19:40:43,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-08-30 19:40:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 6789 transitions. [2023-08-30 19:40:43,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3408132530120482 [2023-08-30 19:40:43,347 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 6789 transitions. [2023-08-30 19:40:43,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 6789 transitions. [2023-08-30 19:40:43,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:43,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 6789 transitions. [2023-08-30 19:40:43,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 81.79518072289157) internal successors, (6789), 83 states have internal predecessors, (6789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:43,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 240.0) internal successors, (20160), 84 states have internal predecessors, (20160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:43,384 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 240.0) internal successors, (20160), 84 states have internal predecessors, (20160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:43,385 INFO L175 Difference]: Start difference. First operand has 293 places, 4504 transitions, 66708 flow. Second operand 83 states and 6789 transitions. [2023-08-30 19:40:43,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 8968 transitions, 147419 flow [2023-08-30 19:41:55,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 8968 transitions, 140951 flow, removed 3062 selfloop flow, removed 13 redundant places. [2023-08-30 19:41:55,475 INFO L231 Difference]: Finished difference. Result has 399 places, 7918 transitions, 138546 flow [2023-08-30 19:41:55,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=63804, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3098, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=138546, PETRI_PLACES=399, PETRI_TRANSITIONS=7918} [2023-08-30 19:41:55,479 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 373 predicate places. [2023-08-30 19:41:55,479 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 7918 transitions, 138546 flow [2023-08-30 19:41:55,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 75.16) internal successors, (1879), 25 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:55,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:41:55,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:41:55,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:41:55,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:55,681 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:41:55,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:41:55,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1401432863, now seen corresponding path program 7 times [2023-08-30 19:41:55,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:41:55,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974827452] [2023-08-30 19:41:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:41:55,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:41:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:56,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:41:56,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974827452] [2023-08-30 19:41:56,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974827452] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:41:56,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25369818] [2023-08-30 19:41:56,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:41:56,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:56,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:41:56,513 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:41:56,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 19:41:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:56,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 19:41:56,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:41:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:56,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:41:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:57,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25369818] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:41:57,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:41:57,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-30 19:41:57,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092294376] [2023-08-30 19:41:57,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:41:57,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 19:41:57,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:41:57,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 19:41:57,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-08-30 19:41:57,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 240 [2023-08-30 19:41:57,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 7918 transitions, 138546 flow. Second operand has 24 states, 24 states have (on average 76.16666666666667) internal successors, (1828), 24 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:57,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:41:57,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 240 [2023-08-30 19:41:57,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:43:36,198 INFO L130 PetriNetUnfolder]: 55768/80973 cut-off events. [2023-08-30 19:43:36,198 INFO L131 PetriNetUnfolder]: For 912151/912151 co-relation queries the response was YES. [2023-08-30 19:43:37,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660732 conditions, 80973 events. 55768/80973 cut-off events. For 912151/912151 co-relation queries the response was YES. Maximal size of possible extension queue 3859. Compared 591688 event pairs, 148 based on Foata normal form. 188/81161 useless extension candidates. Maximal degree in co-relation 658230. Up to 23873 conditions per place. [2023-08-30 19:43:38,374 INFO L137 encePairwiseOnDemand]: 232/240 looper letters, 4311 selfloop transitions, 11241 changer transitions 238/15790 dead transitions. [2023-08-30 19:43:38,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 15790 transitions, 304628 flow [2023-08-30 19:43:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-08-30 19:43:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-08-30 19:43:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 7067 transitions. [2023-08-30 19:43:38,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3423934108527132 [2023-08-30 19:43:38,383 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 7067 transitions. [2023-08-30 19:43:38,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 7067 transitions. [2023-08-30 19:43:38,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:43:38,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 7067 transitions. [2023-08-30 19:43:38,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 82.17441860465117) internal successors, (7067), 86 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:38,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 240.0) internal successors, (20880), 87 states have internal predecessors, (20880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:38,412 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 240.0) internal successors, (20880), 87 states have internal predecessors, (20880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:38,412 INFO L175 Difference]: Start difference. First operand has 399 places, 7918 transitions, 138546 flow. Second operand 86 states and 7067 transitions. [2023-08-30 19:43:38,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 15790 transitions, 304628 flow [2023-08-30 19:52:15,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 15790 transitions, 300255 flow, removed 2035 selfloop flow, removed 11 redundant places. [2023-08-30 19:52:16,174 INFO L231 Difference]: Finished difference. Result has 531 places, 14680 transitions, 302938 flow [2023-08-30 19:52:16,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=136732, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=302938, PETRI_PLACES=531, PETRI_TRANSITIONS=14680} [2023-08-30 19:52:16,182 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 505 predicate places. [2023-08-30 19:52:16,182 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 14680 transitions, 302938 flow [2023-08-30 19:52:16,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 76.16666666666667) internal successors, (1828), 24 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:52:16,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:52:16,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:52:16,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 19:52:16,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:52:16,388 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:52:16,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:52:16,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1908179027, now seen corresponding path program 8 times [2023-08-30 19:52:16,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:52:16,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956532523] [2023-08-30 19:52:16,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:16,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:52:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:52:17,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:52:17,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956532523] [2023-08-30 19:52:17,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956532523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:52:17,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419634472] [2023-08-30 19:52:17,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:52:17,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:52:17,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:52:17,453 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:52:17,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 19:52:17,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:52:17,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:52:17,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 19:52:17,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:52:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:52:17,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:52:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:52:18,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419634472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:52:18,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:52:18,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-08-30 19:52:18,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076284751] [2023-08-30 19:52:18,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:52:18,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 19:52:18,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:52:18,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 19:52:18,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-08-30 19:52:19,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 240 [2023-08-30 19:52:19,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 14680 transitions, 302938 flow. Second operand has 23 states, 23 states have (on average 77.69565217391305) internal successors, (1787), 23 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:52:19,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:52:19,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 240 [2023-08-30 19:52:19,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15